Senko SI-200I and SI-200IS Single Channel Controller

Two closely related products. The SI-200I is a single channel controller with a large display and an integral beacon. The SI-200IS is the same controller with the gas detector built into it, so the sensing and the alarm happen in one wall mounted box.

Which one

Use the SI-200IS where the gas and the people are in the same room and one unit can do both jobs. Use the SI-200I where the detector has to sit somewhere else, at the gas, and the alarm has to be where somebody will see it. That is the usual case in a mechanical room or a pit.

Both carry a built in lithium ion battery, so the alarm survives the power failure that may well be the reason the ventilation stopped in the first place.

Ordering

The controller versions are ordered by signal type: oxygen, toxic in percent by volume, toxic in ppm, or LEL. The integrated versions are ordered by gas. The SKU shown is the Senko part number.