55000-122APO is a heat detector that monitors temperature by using a dual thermistor network which provides a voltage output proportional to the external air temperature.

• · Can be used for applications where smoke detectors are unsuitable
• · Ideal for environments that are dirty or smoky under natural conditions
• · Wide-operating voltage of 933 V DC
• · Flashing LED and magnet operated test switch option
• · Wide-operating and storage temperature of -20C to +60C
• · Electrically and mechanically compatible with Series 60