Esser 802177.IN IQ8Quad FM Isolated Fixed Temperature Heat Detector, Class B (+65 °C)

This device, which is the high temperature version of the 802171.IN model using the same detection scheme, is certified within EN 54-5 Class B. It does not produce false alarms at locations such as drying sections, boiler surroundings, and roof cavities where ambient temperature naturally approaches +65 °C. It is approved for VdS and FM. Thanks to the integrated isolator, a single line fault does not disable the entire loop.