The ATJ-EA incorporates a highly linear thermistor circuit. The specially designed cover protects the thermistor while
allowing maximum air flow. The thermistor circuit produces a voltage proportional to the temperature; this information
is transmitted to the control panel as a digital value. When the ambient temperature exceeds a pre-programmed
threshold (fixed temp or rate of rise), the sensor transmits an interrupt to the control panel indicating a fire alarm. The
fire alarm control panel can adjust the sensor's fixed temperature threshold for different installation
requirements.
Up to 127 devices may be installed on each SLC loop. The sensor address may be set by a hand-held programming
unit. The sensor mounts to an electronics-free base and incorporates a locking mechanism for security. The base
provides mounting slots, terminals for field wiring and a third terminal for a remote indicator/LED. The sensor has
dual LEDs for easy viewing of the sensor status.