Bosch FCH-T320 Conventional Differential and Maximum Heat Detector, 820 Ohm

A conventional heat detector that evaluates the rate of temperature rise and also alarms at a fixed temperature threshold, and operates with 820 Ohm resistance. Since the detector electronics interpret the measurement internally, there is no need to add an additional evaluation unit to the zone circuit. Volumes containing steam, dust, or exhaust gas are typical application areas for this type. A dust-repellent cap and labyrinth structure reduce the frequency of maintenance calls in dirty environments.