2251tem Photoelectric Smoke Sensor

The 2251TEM multi-criteria fire sensor incorporates an optical smoke sensing chamber and thermal sensing elements combined with microprocessor control and sophisticated processing to eliminate transient noise conditions thereby giving reliable fire detection whilst minimising unwanted alarms. It can respond either as a smoke detector, or a rate of rise heat detector or, using special algorithms combining both elements to provide improved reliability of detection.

This is an environmentally friendly replacement for an ionisation detector, providing rapid detection of fast, flaming fires without incurring the significant end-of-life disposal costs associated with products containing radioactive material.

The 2251TEM is approved to a number of sensitivity settings : Three Photo-Thermal and Two Auto Adjusting, which slowly adjust the detector's sensitivity to match short term changes in its environment, thus reducing the potential for nuisance alarms. In additions, it is possible to detect on alarm from heat only, for day/night operation for example.

Similarly to the 2251EM, the 2251TEM includes algorithms, which compensate for a slow build up of contamination, such as dust, within its optical sensing chamber. Once the detector has reached its maximum compensation level, a signal can be sent to the control panel to indicate at the need for maintenance.

Tested and approved to CEA 4021, EN54-7: 2000 and EN54-5: 2000 (Class A1R) by LPCB.

Height:45mm in B501 base