Edwards SIGA-PHCD — Signature Series multisensor detector combining optical smoke sensing, a heat sensor and an electrochemical carbon monoxide cell in one addressable head.
It analyses smoke and heat together and the CO cell independently of both, so one address can give the panel a fire alarm, a life-safety CO alarm, or both. Readings are compared against stored history to filter out patterns not typical of fire.
- Optical smoke sensing, 0.53 to 3.94 %/ft. obscuration range
- Heat sensor: rate of rise at 15°F/min plus a fixed rating of 135°F, alarm point 129 to 144°F
- CO cell life ten years from manufacture; end of life reported as a trouble at the panel
- CO alarm levels per UL 2034: 70 ppm in 60 to 240 min, 400 ppm in 4 to 15
- 15.20 to 19.95 VDC; 51 µA normal, 68 µA in alarm; 250 addresses per loop
- Heat-detector spacing 50 ft. max centers, wall mounting within 12 in. of the ceiling
The SIGA-PHD is the same head without the CO cell, the SIGA-COD is CO only and the SIGA-PD smoke only; SIGA-PHCD-CA is the Canadian version. Separate CO and fire tones need a SIGA-AB4GT base plus a SIGA-TCDR.
