{"title":"Portable and Personal Gas Detectors","description":"\u003ch2\u003eDo I need a pumped monitor or a diffusion monitor?\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIf you test a space before anybody enters it, you need a pump. If you are protecting a person while they work, you need diffusion. Most confined space programs need both.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA diffusion instrument has no pump. Gas reaches the sensors by moving into the instrument on its own, which means it reports the air it is sitting in and nothing else. That makes it the right tool clipped to a collar inside the breathing zone, and the wrong tool for a space nobody has entered yet, because using it there means putting it, and the person holding it, inside.\u003c\/p\u003e\n\u003cp\u003eA pumped instrument draws sample through a probe or a hose, so the atmosphere inside a tank, a vault or a manhole can be characterized from outside it. That is what 29 CFR 1910.146(d)(5)(i) requires when it says the space has to be tested before entry is authorized.\u003c\/p\u003e\n\u003cp\u003eThe usual arrangement is one pumped instrument per crew for the pre entry test, and a diffusion monitor on each entrant for the duration. The \u003ca href=\"\/products\/senko-sp-mgtp-pumped-multi-gas-detector\"\u003eSP-MGTP\u003c\/a\u003e is the pumped instrument. The \u003ca href=\"\/products\/senko-mgt-multi-gas-detector\"\u003eMGT\u003c\/a\u003e is the worn one.\u003c\/p\u003e\n\u003ch2\u003eSingle gas or multi gas?\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eSingle gas where the hazard is known, constant and one thing. Multi gas where the atmosphere is unknown or can change.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA single gas personal monitor is the right instrument for a worker at a sour wellsite whose hazard is hydrogen sulfide, or a technician around combustion equipment whose hazard is carbon monoxide. It is small, it is cheap enough to give everybody one, and it does the job it was bought for.\u003c\/p\u003e\n\u003cp\u003eIt is the wrong instrument for entering anything. A confined space can hold oxygen deficiency, combustibles and toxics in any combination, and a single gas monitor is silent about the other two. That is a four channel job at minimum.\u003c\/p\u003e\n\u003cp\u003eThe \u003ca href=\"\/products\/senko-sgt-single-gas-detector\"\u003eSGT\u003c\/a\u003e is the sealed two year single gas monitor and the \u003ca href=\"\/products\/senko-sgt-p-single-gas-detector\"\u003eSGT-P\u003c\/a\u003e is the serviceable version with a replaceable sensor and battery.\u003c\/p\u003e\n\u003ch2\u003eWhat does a standard four gas monitor miss?\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCarbon dioxide and most solvent vapor. Both are common, and both are invisible to the standard four channels.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe standard four are oxygen, combustibles as percent LEL, hydrogen sulfide and carbon monoxide. That combination covers most confined space fatalities and it is the right default. It also has two well known blind spots.\u003c\/p\u003e\n\u003cp\u003eCarbon dioxide is not combustible, so the LEL channel reads nothing, and because CO2 displaces air physically rather than consuming oxygen, the oxygen channel does not drop below 19.5 percent until carbon dioxide is above about 67,000 ppm. The permissible exposure limit is 5,000 ppm under 29 CFR 1910.1000 Table Z-1. The oxygen sensor is a very late alarm for this gas. If carbon dioxide is credible, add an infrared CO2 channel or carry the \u003ca href=\"\/products\/senko-igas-detector-co2\"\u003eiGas CO2\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eSolvent vapor is the other. An LEL sensor is built around the fire hazard and resolves in percent of the lower explosive limit, which for most solvents is thousands of ppm. An atmosphere well over a solvent exposure limit can read one percent LEL. That is what a photoionization detector is for, and it is covered under \u003ca href=\"\/pages\/voc-monitoring-pid-detectors\"\u003eVOC monitoring and PID detectors\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eHow should alarm setpoints be configured?\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eTo the exposure limits that apply where the crew is standing, which in California are roughly half the federal numbers for the two gases that matter most.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFederally, carbon monoxide is 50 ppm as an eight hour time weighted average under 29 CFR 1910.1000 Table Z-1, and hydrogen sulfide has a 20 ppm ceiling with a 50 ppm peak for a single ten minute period. In California, 8 CCR 5155 Table AC-1 sets carbon monoxide at 25 ppm with a 200 ppm ceiling, and hydrogen sulfide at a 10 ppm ceiling with a 15 ppm short term limit.\u003c\/p\u003e\n\u003cp\u003eOxygen alarms low at 19.5 percent and high at 23.5 percent, which are the figures 29 CFR 1910.146(b) uses to define deficient and enriched.\u003c\/p\u003e\n\u003cp\u003eCombustible gas is conventionally alarmed at 10 percent of the lower explosive limit, a factor of ten below the concentration at which the atmosphere would burn.\u003c\/p\u003e\n\u003cp\u003eInstruments do not arrive configured for California. If your crews work there, the alarms need setting before the instruments go out.\u003c\/p\u003e\n\u003ch2\u003eHow often does a portable monitor need bump testing and calibration?\u003c\/h2\u003e\n\u003cp\u003eA bump test is a functional check: apply gas, confirm the instrument responds and alarms. A calibration is an adjustment against a known concentration. They are not the same thing and one does not replace the other.\u003c\/p\u003e\n\u003cp\u003eThe practice this industry converged on, and what instrument manufacturers generally specify, is a bump test before each day of use and a full calibration on a defined interval. Follow the interval in the manual for the instrument you own, because that is the document an inspector will ask for and the one your warranty depends on.\u003c\/p\u003e\n\u003cp\u003eThe underlying reason is that sensors fail quietly. An electrochemical cell at the end of its life, a catalytic bead poisoned by silicone, or a blocked sensor filter all produce a clean, confident, wrong reading. Nothing about the display tells you. Applying gas is the only way to know the instrument still works, and a docking station makes it a thirty second step with a record attached rather than a task somebody skips.\u003c\/p\u003e\n\u003ch2\u003eWhich application pages should I read?\u003c\/h2\u003e\n\u003cp\u003e\u003ca href=\"\/pages\/confined-space-entry-gas-monitoring\"\u003eConfined space entry\u003c\/a\u003e, for the testing order, the pre entry requirement and the difference between the general industry and construction standards. \u003ca href=\"\/pages\/h2s-monitoring-oil-gas\"\u003eH2S in oil and gas\u003c\/a\u003e, for the ceiling limit and why smell is not a warning device.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"\/pages\/voc-monitoring-pid-detectors\"\u003eVOC monitoring and PID detectors\u003c\/a\u003e, for what a photoionization detector sees, what it does not, and why a total VOC reading is not a benzene measurement. \u003ca href=\"\/pages\/gas-monitoring-wastewater-sewer-utility\"\u003eWastewater, sewers and utility vaults\u003c\/a\u003e, for why a sewer needs continuous monitoring rather than a single pre entry test.\u003c\/p\u003e\n\u003ch2\u003ePrimary sources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.ecfr.gov\/current\/title-29\/subtitle-B\/chapter-XVII\/part-1910\/subpart-J\/section-1910.146\" rel=\"nofollow\"\u003e29 CFR 1910.146, permit required confined spaces\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.ecfr.gov\/current\/title-29\/subtitle-B\/chapter-XVII\/part-1926\/subpart-AA\" rel=\"nofollow\"\u003e29 CFR 1926 Subpart AA, confined spaces in construction\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.osha.gov\/annotated-pels\/table-z-1\" rel=\"nofollow\"\u003e29 CFR 1910.1000 Table Z-1, OSHA annotated permissible exposure limits\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.dir.ca.gov\/title8\/5155.html\" rel=\"nofollow\"\u003e8 CCR 5155, Cal\/OSHA airborne contaminants\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eM Squared Safety Solutions, Inc., 981 Calle Negocio Suite 200, San Clemente, CA 92673, 949-954-6581. Every code and regulatory statement on this page was read against the cited source on 18 September 2026. Model code section numbers are cited to the 2018 International Fire Code and International Mechanical Code. Jurisdictions adopt and amend these codes separately, so confirm the edition in force where the work is. This page describes what the regulations say. Whether a given provision is satisfied at a particular facility is a determination for that employer and the code official.\u003c\/em\u003e\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@graph\": [{\"@type\": \"FAQPage\", \"@id\": \"https:\/\/msquaredsafety.com\/collections\/portable-gas-detectors#faq\", \"url\": \"https:\/\/msquaredsafety.com\/collections\/portable-gas-detectors\", \"name\": \"Portable and Personal Gas Detectors\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Do I need a pumped monitor or a diffusion monitor?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"If you test a space before anybody enters it, you need a pump. If you are protecting a person while they work, you need diffusion. Most confined space programs need both. A diffusion instrument has no pump. Gas reaches the sensors by moving into the instrument on its own, which means it reports the air it is sitting in and nothing else. That makes it the right tool clipped to a collar inside the breathing zone, and the wrong tool for a space nobody has entered yet, because using it there means putting it, and the person holding it, inside. A pumped instrument draws sample through a probe or a hose, so the atmosphere inside a tank, a vault or a manhole can be characterized from outside it. That is what 29 CFR 1910.146(d)(5)(i) requires when it says the space has to be tested before entry is authorized. The usual arrangement is one pumped instrument per crew for the pre entry test, and a diffusion monitor on each entrant for the duration. The SP-MGTP is the pumped instrument. The MGT is the worn one.\"}}, {\"@type\": \"Question\", \"name\": \"Single gas or multi gas?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Single gas where the hazard is known, constant and one thing. Multi gas where the atmosphere is unknown or can change. A single gas personal monitor is the right instrument for a worker at a sour wellsite whose hazard is hydrogen sulfide, or a technician around combustion equipment whose hazard is carbon monoxide. It is small, it is cheap enough to give everybody one, and it does the job it was bought for. It is the wrong instrument for entering anything. A confined space can hold oxygen deficiency, combustibles and toxics in any combination, and a single gas monitor is silent about the other two. That is a four channel job at minimum. The SGT is the sealed two year single gas monitor and the SGT-P is the serviceable version with a replaceable sensor and battery.\"}}, {\"@type\": \"Question\", \"name\": \"What does a standard four gas monitor miss?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Carbon dioxide and most solvent vapor. Both are common, and both are invisible to the standard four channels. The standard four are oxygen, combustibles as percent LEL, hydrogen sulfide and carbon monoxide. That combination covers most confined space fatalities and it is the right default. It also has two well known blind spots. Carbon dioxide is not combustible, so the LEL channel reads nothing, and because CO2 displaces air physically rather than consuming oxygen, the oxygen channel does not drop below 19.5 percent until carbon dioxide is above about 67,000 ppm. The permissible exposure limit is 5,000 ppm under 29 CFR 1910.1000 Table Z-1. The oxygen sensor is a very late alarm for this gas. If carbon dioxide is credible, add an infrared CO2 channel or carry the iGas CO2 . Solvent vapor is the other. An LEL sensor is built around the fire hazard and resolves in percent of the lower explosive limit, which for most solvents is thousands of ppm. An atmosphere well over a solvent exposure limit can read one percent LEL. That is what a photoionization detector is for, and it is covered under VOC monitoring and PID detectors .\"}}, {\"@type\": \"Question\", \"name\": \"How should alarm setpoints be configured?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"To the exposure limits that apply where the crew is standing, which in California are roughly half the federal numbers for the two gases that matter most. Federally, carbon monoxide is 50 ppm as an eight hour time weighted average under 29 CFR 1910.1000 Table Z-1, and hydrogen sulfide has a 20 ppm ceiling with a 50 ppm peak for a single ten minute period. In California, 8 CCR 5155 Table AC-1 sets carbon monoxide at 25 ppm with a 200 ppm ceiling, and hydrogen sulfide at a 10 ppm ceiling with a 15 ppm short term limit. Oxygen alarms low at 19.5 percent and high at 23.5 percent, which are the figures 29 CFR 1910.146(b) uses to define deficient and enriched. Combustible gas is conventionally alarmed at 10 percent of the lower explosive limit, a factor of ten below the concentration at which the atmosphere would burn. Instruments do not arrive configured for California. If your crews work there, the alarms need setting before the instruments go out.\"}}, {\"@type\": \"Question\", \"name\": \"How often does a portable monitor need bump testing and calibration?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"A bump test is a functional check: apply gas, confirm the instrument responds and alarms. A calibration is an adjustment against a known concentration. They are not the same thing and one does not replace the other. The practice this industry converged on, and what instrument manufacturers generally specify, is a bump test before each day of use and a full calibration on a defined interval. Follow the interval in the manual for the instrument you own, because that is the document an inspector will ask for and the one your warranty depends on. The underlying reason is that sensors fail quietly. An electrochemical cell at the end of its life, a catalytic bead poisoned by silicone, or a blocked sensor filter all produce a clean, confident, wrong reading. Nothing about the display tells you. Applying gas is the only way to know the instrument still works, and a docking station makes it a thirty second step with a record attached rather than a task somebody skips.\"}}, {\"@type\": \"Question\", \"name\": \"Which application pages should I read?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Confined space entry , for the testing order, the pre entry requirement and the difference between the general industry and construction standards. H2S in oil and gas , for the ceiling limit and why smell is not a warning device. VOC monitoring and PID detectors , for what a photoionization detector sees, what it does not, and why a total VOC reading is not a benzene measurement. Wastewater, sewers and utility vaults , for why a sewer needs continuous monitoring rather than a single pre entry test.\"}}], \"publisher\": {\"@type\": \"Organization\", \"name\": \"M Squared Safety Solutions, Inc.\", \"address\": {\"@type\": \"PostalAddress\", \"streetAddress\": \"981 Calle Negocio Suite 200\", \"addressLocality\": \"San Clemente\", \"addressRegion\": \"CA\", \"postalCode\": \"92673\", \"addressCountry\": \"US\"}, \"telephone\": \"+1-949-954-6581\", \"url\": \"https:\/\/msquaredsafety.com\"}}]}\u003c\/script\u003e","products":[{"product_id":"senko-sp-mgtp-pumped-multi-gas-detector","title":"Senko SP-MGTP Pumped Multi Gas Detector","description":"\u003cp\u003eThe SP-MGTP is the pumped instrument in the Senko portable range. The internal pump draws sample through a probe or a length of tubing, so the atmosphere inside a tank, a vault or a manhole can be characterized from outside it, before anyone commits to the space.\u003c\/p\u003e\n\n\u003ch2\u003eWhy the pump matters\u003c\/h2\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.ecfr.gov\/current\/title-29\/subtitle-B\/chapter-XVII\/part-1910\/subpart-J\/section-1910.146\" rel=\"nofollow\"\u003e29 CFR 1910.146(d)(5)(i)\u003c\/a\u003e requires the permit space to be tested to determine whether acceptable entry conditions exist before entry is authorized. A diffusion monitor can only report the air it is sitting in, so satisfying that requirement without entering the space needs a pump and a probe that reaches the space from outside.\u003c\/p\u003e\n\u003cp\u003eThe same section sets the order of the test at \u003ca href=\"https:\/\/www.ecfr.gov\/current\/title-29\/subtitle-B\/chapter-XVII\/part-1910\/subpart-J\/section-1910.146\" rel=\"nofollow\"\u003e1910.146(d)(5)(iii)\u003c\/a\u003e: \"When testing for atmospheric hazards, test first for oxygen, then for combustible gases and vapors, and then for toxic gases and vapors.\" The reason is given in Appendix B to the standard. Most combustible gas sensors need oxygen to work, so a combustible reading taken in an oxygen deficient atmosphere cannot be trusted.\u003c\/p\u003e\n\n\u003ch2\u003eChannels\u003c\/h2\u003e\n\u003cp\u003eConfigurations run to six channels. Beyond the standard four, the two that change what the instrument can do are:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePID, for volatile organic compounds.\u003c\/strong\u003e A photoionization detector sees solvent and fuel vapors that a catalytic LEL sensor reads as almost nothing at low concentration. If your hazard is residual product in a tank, a PID channel is the difference between a useful number and a flat zero.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInfrared carbon dioxide.\u003c\/strong\u003e Carbon dioxide is not combustible and does not show on an LEL sensor. It is heavier than air and it collects in low spaces. If you work in vaults, cellars, pits or anywhere near bulk CO2, this is the channel that sees it.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhat a PID will not tell you\u003c\/h2\u003e\n\u003cp\u003eA PID reports a total VOC number, not a compound. It cannot tell benzene from toluene. Where benzene specifically is the regulated exposure, under \u003ca href=\"https:\/\/www.ecfr.gov\/current\/title-29\/subtitle-B\/chapter-XVII\/part-1910\/subpart-Z\/section-1910.1028\" rel=\"nofollow\"\u003e29 CFR 1910.1028\u003c\/a\u003e, a total VOC reading is not a benzene measurement and should not be recorded as one. Benzene specific measurement uses a pre filter tube ahead of the PID.\u003c\/p\u003e\n\n\u003ch2\u003eOrdering\u003c\/h2\u003e\n\u003cp\u003eSelect the configuration from the list. The SKU shown is the Senko part number. Probes, tubing, calibration gas and docking stations are ordered separately.\u003c\/p\u003e","brand":"Senko","offers":[{"title":"O2 \/ 0010","offer_id":56205385204034,"sku":"AAA104002","price":750.5,"currency_code":"USD","in_stock":true},{"title":"CH4(Catalytic) \/ P0000","offer_id":56205385236802,"sku":"AAA104006","price":750.5,"currency_code":"USD","in_stock":true},{"title":"CO\/H2S \/ 0001","offer_id":56205385269570,"sku":"AAA104257","price":750.5,"currency_code":"USD","in_stock":true},{"title":"O2, CO\/H2S, CH4(Catalytic) \/ P0011","offer_id":56205385302338,"sku":"AAA104056","price":807.5,"currency_code":"USD","in_stock":true},{"title":"O2, CO\/H2S, CH4(Catalytic), PID \/ P0111","offer_id":56205385335106,"sku":"AAA104142","price":1995.0,"currency_code":"USD","in_stock":true},{"title":"O2, CO\/H2S, CH4(Catalytic), SO2 \/ P0211","offer_id":56205385367874,"sku":"AAA104153","price":1140.0,"currency_code":"USD","in_stock":true},{"title":"O2, CO\/H2S, CH4(Catalytic), CL2 \/ P0811","offer_id":56205385400642,"sku":"AAA104160","price":1140.0,"currency_code":"USD","in_stock":true},{"title":"O2, CO\/H2S, CH4(Catalytic), NH3 \/ P0311","offer_id":56205385433410,"sku":"AAA104152","price":1140.0,"currency_code":"USD","in_stock":true},{"title":"O2, CO\/H2S, CH4(Catalytic), H2 \/ P0411","offer_id":56205385466178,"sku":"AAA104173","price":1140.0,"currency_code":"USD","in_stock":true},{"title":"O2, CO\/H2S, CH4(Catalytic), NO2 \/ P0511","offer_id":56205385498946,"sku":"AAA104210","price":1140.0,"currency_code":"USD","in_stock":true},{"title":"O2, CO\/H2S, CH4(Catalytic), NO \/ P0611","offer_id":56205385531714,"sku":"AAA104274","price":1140.0,"currency_code":"USD","in_stock":true},{"title":"O2, CO\/H2S, CH4(Catalytic), H2O2(0 to 100ppm) \/ P0D11","offer_id":56205385564482,"sku":"AAA104506","price":1282.5,"currency_code":"USD","in_stock":true},{"title":"O2, CO\/H2S, CH4(Catalytic), HCN(50ppm) \/ P0B11","offer_id":56205385597250,"sku":"AAA104624","price":1306.25,"currency_code":"USD","in_stock":true},{"title":"O2, CO\/H2S, CH4(Catalytic), PH3 \/ P0E11","offer_id":56205385630018,"sku":"AAA104622","price":1282.5,"currency_code":"USD","in_stock":true},{"title":"O2, CO\/H2S, CH4(Catalytic), CLO2 \/ P0A11","offer_id":56205385662786,"sku":"AAA104629","price":1306.25,"currency_code":"USD","in_stock":true},{"title":"O2, CO\/H2S, CH4(Catalytic), HCL (0 to 20ppm) \/ P0C11","offer_id":56205385695554,"sku":"AAA104626","price":1282.5,"currency_code":"USD","in_stock":true},{"title":"O2, CO, H2S, CH4(IR) \/ N0011","offer_id":56205385728322,"sku":"AAA104057","price":1260.65,"currency_code":"USD","in_stock":true},{"title":"O2, CO\/H2S, CH4(IR), PID \/ N0111","offer_id":56205385761090,"sku":"AAA104144","price":2566.9,"currency_code":"USD","in_stock":true},{"title":"O2, CO\/H2S, CH4(IR), SO2 \/ N0211","offer_id":56205385793858,"sku":"AAA104172","price":1626.4,"currency_code":"USD","in_stock":true},{"title":"O2, CO\/H2S, CH4(IR), CL2 \/ N0811","offer_id":56205385826626,"sku":"AAA104170","price":1626.4,"currency_code":"USD","in_stock":true},{"title":"O2, CO\/H2S, CH4(IR), NH3 \/ N0311","offer_id":56205385859394,"sku":"AAA104171","price":1626.4,"currency_code":"USD","in_stock":true},{"title":"O2, CO\/H2S, CH4(IR), H2 \/ N0411","offer_id":56205385892162,"sku":"AAA104623","price":1626.4,"currency_code":"USD","in_stock":true},{"title":"O2, CO\/H2S, CH4(IR), NO2 \/ N0511","offer_id":56205385924930,"sku":"AAA104625","price":1626.4,"currency_code":"USD","in_stock":true},{"title":"O2, CO\/H2S, CH4(IR), NO \/ N0611","offer_id":56205385957698,"sku":"AAA104275","price":1626.4,"currency_code":"USD","in_stock":true},{"title":"O2, CO\/H2S, CH4(IR), H2O2(0 to 100ppm) \/ N0D11","offer_id":56205385990466,"sku":"AAA104507","price":1783.15,"currency_code":"USD","in_stock":true},{"title":"O2, CO\/H2S, CH4(IR), HCN(50ppm) \/ N0B11","offer_id":56205386023234,"sku":"AAA104283","price":1808.8,"currency_code":"USD","in_stock":true},{"title":"O2, CO\/H2S, CH4(IR), PH3 \/ N0E11","offer_id":56205386056002,"sku":"AAA104284","price":1783.15,"currency_code":"USD","in_stock":true},{"title":"O2, CO\/H2S, CH4(IR), CLO2 \/ N0A11","offer_id":56205386088770,"sku":"AAA104630","price":1808.8,"currency_code":"USD","in_stock":true},{"title":"O2, CO\/H2S, CH4(IR), HCL(0 to 20ppm) \/ N0C11","offer_id":56205386121538,"sku":"AAA104627","price":1783.15,"currency_code":"USD","in_stock":true},{"title":"O2, CO\/H2S, CH4\/CO2(IR) \/ N2011","offer_id":56205386154306,"sku":"AAA104168","price":1678.65,"currency_code":"USD","in_stock":true},{"title":"O2, CO\/H2S, CH4\/CO2(IR), PID \/ N2111","offer_id":56205386187074,"sku":"AAA104146","price":2984.9,"currency_code":"USD","in_stock":true},{"title":"O2, CO\/H2S, CH4\/CO2(IR), SO2 \/ N2211","offer_id":56205386219842,"sku":"AAA104179","price":2044.4,"currency_code":"USD","in_stock":true},{"title":"O2, CO\/H2S, CH4\/CO2(IR), CL2 \/ N2811","offer_id":56205386252610,"sku":"AAA104184","price":2044.4,"currency_code":"USD","in_stock":true},{"title":"O2, CO\/H2S, CH4\/CO2(IR), NH3 \/ N2311","offer_id":56205386285378,"sku":"AAA104183","price":2044.4,"currency_code":"USD","in_stock":true},{"title":"O2, CO\/H2S, CH4\/CO2(IR), H2 \/ N2411","offer_id":56205386318146,"sku":"AAA104216","price":2044.4,"currency_code":"USD","in_stock":true},{"title":"O2, CO\/H2S, CH4\/CO2(IR), NO2 \/ N2511","offer_id":56205386350914,"sku":"AAA104156","price":2044.4,"currency_code":"USD","in_stock":true},{"title":"O2, CO\/H2S, CH4\/CO2(IR), NO \/ N2611","offer_id":56205386383682,"sku":"AAA104276","price":2044.4,"currency_code":"USD","in_stock":true},{"title":"O2, CO\/H2S, CH4\/CO2(IR), H2O2(0 to 100ppm) \/ N2D11","offer_id":56205386416450,"sku":"AAA104508","price":2201.15,"currency_code":"USD","in_stock":true},{"title":"O2, CO\/H2S, CH4\/CO2(IR), HCN(50ppm) \/ N2B11","offer_id":56205386449218,"sku":"AAA104286","price":2201.15,"currency_code":"USD","in_stock":true},{"title":"O2, CO\/H2S, CH4\/CO2(IR), PH3 \/ N2E11","offer_id":56205386481986,"sku":"AAA104287","price":2226.8,"currency_code":"USD","in_stock":true},{"title":"O2, CO\/H2S, CH4\/CO2(IR), CLO2 \/ N2A11","offer_id":56205386514754,"sku":"AAA104631","price":2201.15,"currency_code":"USD","in_stock":true},{"title":"O2, CO\/H2S, CH4\/CO2(IR), HCL( 0 to 20ppm) \/ N2C11","offer_id":56205386547522,"sku":"AAA104185","price":2226.8,"currency_code":"USD","in_stock":true}]},{"product_id":"senko-igas-detector-co2","title":"Senko iGas Detector CO2","description":"\u003cp\u003eA compact portable carbon dioxide monitor, for the spaces where CO2 collects and nothing else will see it.\u003c\/p\u003e\n\n\u003ch2\u003eWhy carbon dioxide needs its own instrument\u003c\/h2\u003e\n\u003cp\u003eCarbon dioxide is invisible to the two sensors people assume will cover them. It is not combustible, so an LEL channel reads nothing. And because it displaces air rather than consuming oxygen chemically, an oxygen sensor only begins to react once the CO2 concentration is already very high. By the time a four gas monitor drops below 19.5 percent oxygen, the carbon dioxide concentration in that space is far above the OSHA permissible exposure limit of 5,000 ppm as an eight hour time weighted average under \u003ca href=\"https:\/\/www.osha.gov\/annotated-pels\/table-z-1\" rel=\"nofollow\"\u003e29 CFR 1910.1000 Table Z-1\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eThat is the whole argument for a dedicated CO2 instrument. If your hazard is carbon dioxide, an oxygen sensor is a late alarm.\u003c\/p\u003e\n\n\u003ch2\u003eWhere it gets used\u003c\/h2\u003e\n\u003cp\u003eBreweries and wineries, where fermentation produces CO2 continuously. Beverage dispensing and bulk CO2 rooms. Walk in coolers and cellars. Cold storage. Anywhere a bulk or cylinder CO2 supply sits in a room people walk into. CO2 is heavier than air, so it pools at floor level and in pits, which is exactly where somebody bending down to work is putting their head.\u003c\/p\u003e\n\u003cp\u003eFor permanently mounted detection in these spaces, and for the fire code requirements that come with a bulk CO2 system, see \u003ca href=\"\/pages\/co2-monitoring-breweries-beverage\"\u003ecarbon dioxide monitoring for breweries and beverage systems\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eOrdering\u003c\/h2\u003e\n\u003cp\u003eThe SKU shown is the Senko part number. Calibration gas is ordered separately.\u003c\/p\u003e","brand":"Senko","offers":[{"title":"iGAS DETECTOR CO2(IR, 0 to 5%vol)","offer_id":56205665796418,"sku":"AAA077025","price":427.5,"currency_code":"USD","in_stock":true}]},{"product_id":"senko-sgt-single-gas-detector","title":"Senko SGT Single Gas Detector","description":"\u003cp\u003eThe SGT is a personal single gas monitor built for people who need a reliable alarm on one gas and nothing else to think about. It arrives switched on, it runs for two years, and there is no sensor to replace and no battery to charge.\u003c\/p\u003e\n\n\u003ch2\u003eWho this is for\u003c\/h2\u003e\n\u003cp\u003eSingle gas personal monitors do one job well. They are worn on the collar or lapel, inside the breathing zone, by workers whose hazard is known and constant. The classic cases are hydrogen sulfide at a sour wellsite or a wastewater plant, and carbon monoxide around engine exhaust or combustion equipment.\u003c\/p\u003e\n\u003cp\u003eIf you need to characterize an unknown atmosphere, or you need to test a space before anybody enters it, a single gas diffusion monitor is the wrong tool. That job needs a pumped multi gas instrument. See the \u003ca href=\"\/collections\/portable-gas-detectors\"\u003efull portable range\u003c\/a\u003e or the guidance on \u003ca href=\"\/pages\/confined-space-entry-gas-monitoring\"\u003econfined space entry monitoring\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eWhat you get\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eTwo year continuous runtime, sealed, with no battery replacement and no sensor replacement\u003c\/li\u003e\n\u003cli\u003eAudible, visual and vibrating alarm\u003c\/li\u003e\n\u003cli\u003eEvent and alarm logging\u003c\/li\u003e\n\u003cli\u003eBump test and calibration through the Senko docking station\u003c\/li\u003e\n\u003cli\u003eGas selected at the time of order. The part number determines the gas and the range.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSGT or SGT-P\u003c\/h2\u003e\n\u003cp\u003eThe SGT is sealed and disposable. At the end of its service life you replace the instrument. The \u003ca href=\"\/products\/senko-sgt-p-single-gas-detector\"\u003eSGT-P\u003c\/a\u003e is the serviceable version of the same instrument: the sensor and the battery can be replaced, so the body keeps working past the life of the first sensor. If you are buying a handful of monitors for a known two year program, the SGT is usually the lower total cost. If you are standardizing a fleet you intend to keep, price the SGT-P.\u003c\/p\u003e\n\n\u003ch2\u003eOrdering\u003c\/h2\u003e\n\u003cp\u003eSelect the gas from the list. The SKU shown is the Senko part number, which is the number your order is placed against. Calibration gas and docking stations are ordered separately.\u003c\/p\u003e","brand":"Senko","offers":[{"title":"O2 (0 to 30%vol)","offer_id":56205664813378,"sku":"AAA002002","price":156.75,"currency_code":"USD","in_stock":true},{"title":"CO (0 to 500ppm)","offer_id":56205664846146,"sku":"AAA002004","price":154.85,"currency_code":"USD","in_stock":true},{"title":"H2S (0 to 100ppm)","offer_id":56205664878914,"sku":"AAA002012","price":154.85,"currency_code":"USD","in_stock":true},{"title":"H2 (0 to 1,000ppm)","offer_id":56205664911682,"sku":"AAA002016","price":347.7,"currency_code":"USD","in_stock":true},{"title":"SO2 (0 to 50ppm)","offer_id":56205664944450,"sku":"AAA002301","price":347.7,"currency_code":"USD","in_stock":true},{"title":"NH3 (0 to 100ppm)","offer_id":56205664977218,"sku":"AAA002018","price":391.4,"currency_code":"USD","in_stock":true},{"title":"NO2 (0 to 20ppm)","offer_id":56205665009986,"sku":"AAA002027","price":391.4,"currency_code":"USD","in_stock":true}]},{"product_id":"senko-sgt-p-single-gas-detector","title":"Senko SGT-P Single Gas Detector","description":"\u003cp\u003eThe SGT-P is the serviceable version of the Senko single gas personal monitor. The sensor and the battery are replaceable, so the instrument outlives its first sensor and the cost of ownership is spread across the life of the body rather than absorbed every two years.\u003c\/p\u003e\n\n\u003ch2\u003eWho this is for\u003c\/h2\u003e\n\u003cp\u003eFleets. If you are buying one or two monitors for a specific job, the sealed \u003ca href=\"\/products\/senko-sgt-single-gas-detector\"\u003eSGT\u003c\/a\u003e is simpler. If you are standardizing a department on a single gas monitor and you expect to keep the instruments, the SGT-P is the version that makes sense, because the recurring cost becomes a sensor rather than an instrument.\u003c\/p\u003e\n\n\u003ch2\u003eWhat you get\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eField replaceable sensor and field replaceable battery\u003c\/li\u003e\n\u003cli\u003eAudible, visual and vibrating alarm\u003c\/li\u003e\n\u003cli\u003eEvent and alarm logging\u003c\/li\u003e\n\u003cli\u003eBump test and calibration through the Senko docking station\u003c\/li\u003e\n\u003cli\u003eA wider gas list than the sealed SGT, including hydrogen chloride and chlorine dioxide\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eA note on gas selection\u003c\/h2\u003e\n\u003cp\u003eThe part number determines both the gas and the measuring range. A monitor ordered for one gas cannot be converted to another by swapping the sensor alone. If you are not certain which range you need, the range matters most where the exposure limit is low: chlorine dioxide and hydrogen chloride are measured in single digit parts per million, and a wide range instrument will not give you useful resolution near the limit.\u003c\/p\u003e\n\n\u003ch2\u003eOrdering\u003c\/h2\u003e\n\u003cp\u003eSelect the gas from the list. The SKU shown is the Senko part number. Calibration gas, sensors and docking stations are ordered separately.\u003c\/p\u003e","brand":"Senko","offers":[{"title":"O2 (0 to 30%vol)","offer_id":56205665042754,"sku":"AAA064002","price":168.15,"currency_code":"USD","in_stock":true},{"title":"CO (0 to 500ppm)","offer_id":56205665075522,"sku":"AAA064004","price":163.4,"currency_code":"USD","in_stock":true},{"title":"H2S (0 to 100ppm)","offer_id":56205665108290,"sku":"AAA064012","price":163.4,"currency_code":"USD","in_stock":true},{"title":"H2 (0 to 1,000ppm)","offer_id":56205665141058,"sku":"AAA064016","price":351.5,"currency_code":"USD","in_stock":true},{"title":"SO2 (0 to 50ppm)","offer_id":56205665173826,"sku":"AAA064301","price":351.5,"currency_code":"USD","in_stock":true},{"title":"NH3 (0 to 100ppm)","offer_id":56205665206594,"sku":"AAA064018","price":408.5,"currency_code":"USD","in_stock":true},{"title":"NO2 (0 to 20ppm)","offer_id":56205665239362,"sku":"AAA064027","price":408.5,"currency_code":"USD","in_stock":true},{"title":"CL2 (0 to 20ppm)","offer_id":56205665272130,"sku":"AAA064030","price":408.5,"currency_code":"USD","in_stock":true},{"title":"ClO2 (0 to 5ppm)","offer_id":56205665304898,"sku":"AAA064307","price":475.0,"currency_code":"USD","in_stock":true},{"title":"HCN (0 to 50ppm)","offer_id":56205665337666,"sku":"AAA064190","price":475.0,"currency_code":"USD","in_stock":true},{"title":"PH3 (0 to 5ppm)","offer_id":56205665370434,"sku":"AAA064072","price":475.0,"currency_code":"USD","in_stock":true},{"title":"HCl (0 to 20ppm)","offer_id":56205665403202,"sku":"AAA064272","price":475.0,"currency_code":"USD","in_stock":true}]},{"product_id":"senko-mgt-multi-gas-detector","title":"Senko MGT Multi Gas Detector","description":"\u003cp\u003eThe MGT is the compact diffusion multi gas monitor in the Senko range. It covers the four gases that account for most confined space fatalities: oxygen, combustibles as percent LEL, hydrogen sulfide and carbon monoxide.\u003c\/p\u003e\n\n\u003ch2\u003eDiffusion, and what that means for confined space work\u003c\/h2\u003e\n\u003cp\u003eThe MGT is a diffusion instrument. Gas reaches the sensors by moving into the instrument on its own, which means the MGT samples the air where the instrument is. That makes it the right tool to wear on the body during work inside a space, and the wrong tool to test a space you have not entered yet.\u003c\/p\u003e\n\u003cp\u003eUnder \u003ca href=\"https:\/\/www.ecfr.gov\/current\/title-29\/subtitle-B\/chapter-XVII\/part-1910\/subpart-J\/section-1910.146\" rel=\"nofollow\"\u003e29 CFR 1910.146(d)(5)(i)\u003c\/a\u003e the atmosphere has to be tested before entry is authorized, which means before anyone puts their head or body into the opening. Testing from outside needs a pump and a probe. The pumped instrument in this range is the \u003ca href=\"\/products\/senko-sp-mgtp-pumped-multi-gas-detector\"\u003eSP-MGTP\u003c\/a\u003e. A common and defensible setup is one pumped instrument per crew for the pre entry test, and a diffusion monitor worn by each entrant during the work.\u003c\/p\u003e\n\n\u003ch2\u003eWhat you get\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSimultaneous display of every installed channel\u003c\/li\u003e\n\u003cli\u003eAudible, visual and vibrating alarm\u003c\/li\u003e\n\u003cli\u003eDatalogging and event logging\u003c\/li\u003e\n\u003cli\u003eBump test and calibration through the Senko docking station\u003c\/li\u003e\n\u003cli\u003eChannel configuration set by part number at the time of order\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eOrdering\u003c\/h2\u003e\n\u003cp\u003eSelect the configuration from the list. The SKU shown is the Senko part number. Calibration gas, sensors and docking stations are ordered separately.\u003c\/p\u003e","brand":"Senko","offers":[{"title":"Catalytic - O2, CO, H2S, CH4 (4Gas)","offer_id":56205665435970,"sku":"AAA057056","price":559.55,"currency_code":"USD","in_stock":true},{"title":"Catalytic - O2, CO, H2S (3Gas)","offer_id":56205665468738,"sku":"AAA057131","price":542.45,"currency_code":"USD","in_stock":true},{"title":"Catalytic - CO, H2S, CH4 (3Gas)","offer_id":56205665501506,"sku":"AAA057259","price":524.4,"currency_code":"USD","in_stock":true},{"title":"Catalytic - O2, CH4 (2Gas)","offer_id":56205665534274,"sku":"AAA057048","price":488.3,"currency_code":"USD","in_stock":true},{"title":"Catalytic - CO, H2S (2Gas)","offer_id":56205665567042,"sku":"AAA057257","price":506.35,"currency_code":"USD","in_stock":true},{"title":"Catalytic - O2 (1Gas)","offer_id":56205665599810,"sku":"AAA057002","price":488.3,"currency_code":"USD","in_stock":true},{"title":"Catalytic - CH4 (1Gas)","offer_id":56205665632578,"sku":"AAA057006","price":488.3,"currency_code":"USD","in_stock":true},{"title":"NDIR - O2, CO, H2S, CH4 (4Gas)","offer_id":56205665665346,"sku":"AAA057057","price":698.25,"currency_code":"USD","in_stock":true},{"title":"NDIR - CO, H2S, CH4 (3Gas)","offer_id":56205665698114,"sku":"AAA057262","price":674.5,"currency_code":"USD","in_stock":true},{"title":"NDIR - O2, CH4 (2Gas)","offer_id":56205665730882,"sku":"AAA057049","price":650.75,"currency_code":"USD","in_stock":true},{"title":"NDIR - CH4 (1Gas)","offer_id":56205665763650,"sku":"AAA057007","price":627.0,"currency_code":"USD","in_stock":true}]}],"url":"https:\/\/msquaredsafety.com\/collections\/portable-gas-detectors.oembed","provider":"M Squared Safety","version":"1.0","type":"link"}