- UL listed to standard 521
- NFPA Style 4, 6, and 7 applicable for signal line circuit
- Low profile appearance
- Low current design
- Wide range input voltage
- Status LED
The FDL25U is an analog heat detector which employs thermistor having such a characteristic that its resistance decreases with temperature, as heat sensing element. The detector converts a detected temperature to an analog signal of the corresponding level, and sends it to FACR
The detector has drift compensation functionality by which the detector is able to self-adjust its sensitivity in a pre-determined range when the sensitivity is drifted by some reason.
The analog detector equips with a red LED that flashes under normal monitoring condition and turns on under alarm condition.