Specifications:

Height: 2.2˝ (55 mm) installed in Base
Diameter: 4.0˝ (103 mm)
Weight: 5.5 oz. (155 g)
Installation Temperatures: 14°F to 122°F (-10°C to50°C)
Operating Humidity Range: 10% to 93% Relative Humidity Non-condensing
Operating Voltage Range: 9 to 28VDC Volts Non-polarized
Standby Current: 40µA @ 24 VDC
Maximum Alarm Current (LED on): ≤30mA @ 24 VDC
Fixed Temperature Rating: 135°F (57°C)