System Sensor 4wtr-b
ChatMRO

The System Sensor 4WTR-B is in our catalogue: Wiring 4-wire, Thermal Sensor 135 degree Fahrenheit (57.2 degree Celsius) fixed, Freeze Trouble 41 degree Fahrenheit (5 degree Celsius).

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In stock4-Wire Photoelectric Smoke Detector with Form C Relay and Fixed Temperature Thermal Sensor
System Sensor · 4WTR-B

4-Wire Photoelectric Smoke Detector with Form C Relay and Fixed Temperature Thermal Sensor

$ 119.65per unit · ex. VAT
The 4WTR-B is a 4-wire photoelectric smoke detector featuring a built-in fixed temperature thermal sensor rated at 135°F (57.2°C) and a Form C relay. It operates within a voltage range of 10–35 V and includes freeze trouble detection at 41°F (5°C). Designed for reliable fire detection, it supports standard back box mounting options and functions in environments with 0–95% non-condensing humidity.
Wiring
4-wire
Thermal Sensor
135 degree Fahrenheit (57.2 degree Celsius) fixed
Freeze Trouble
41 degree Fahrenheit (5 degree Celsius)
Operating Voltage
10 V to 35 V
Alarm Contact Ratings
0.5 A @ 30 V AC/DC
Wiring4-wire
Thermal Sensor135 degree Fahrenheit (57.2 degree Celsius) fixed
Freeze Trouble41 degree Fahrenheit (5 degree Celsius)
Operating Voltage10 V to 35 V
Alarm Contact Ratings0.5 A @ 30 V AC/DC
Form C Contact Ratings2 A @ 30 V AC/DC
Operating Humidity Range0 to 95 percent RH non-condensing
Diameter (including base)5.3 inch
Height (including base)2.0 inch
Operating Temperature Range32 to 100 degree Fahrenheit (0 to 37.8 degree Celsius)
Storage Temperature Range–4 to 158 degree Fahrenheit (–20 to 70 degree Celsius)
Max. Alarm Current35 mA