Rod-Temperature Fire Detector

(P/N: 80232)

Rod-Temperature Fire Detector DAF94-...-..
Dimensions (h x w x d)265 mm x 135 mm x 81 mm
Housing materialaluminum
Material temp.sensing elementstainless steel
Weight1.2 kg
Protection typeIP 54
Ambient temperature-35 °C to 85 °C
Case finishRAL 7001
Max. contact load48 V DC / 0.5 A


The Rod-Temperature Fire Detector reacts to absolute temperature as well as to temperature rise and thus combines the positive performance characteristics of conventional heat sensitive detectors and differential detectors.

The Rod-Temperature Fire Detector operates according to so-called principle of differential expansion principle. It consists of a preformed concave or convex contact system with low coefficients of expansion housed inside a feeler tube whose coefficients of expansion are high . The contact system is anchored to the fronted of the feeler tube.

When heated, then yields a different linear expansion, which leads to the clamping of the contact system, and thus depending on the type for closing or opening of the contacts. The response level (60°C/ 71°C / 88°C / 107°C / 135°C / 162°C) is preset by the factory.

The alarm is the earlier, the faster the temperature rise.

Through a balanced design, the system is tuned so that through immediate, harmless temperature effects (e.g. as warm air when opening an oven door) no alarm is triggered.