2 programmable alarm thresholds

The surveyor 4B is a single – channel controller designed to detect combustible gases in boiler plants, battery charging rooms, and more generally in small units that need one or two detectors. It has two different alarm thresholds and built-in relays. It can be easily mounted to a DIN rail.

Input: Wheatstone Bridge sensor

Outputs: 2 relays (1 common gas and fault, 1 gas)

Power supply: 11.5 to 14Vcc or 207 to 242 Vca

Indicators: Built in audible and visual alarms

Certifications: CE

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