| Detection principle | Measurement of heat by means of a thermistor. |
| Supply Wiring | Two wire supply, polarity insensitive |
| Supply voltage | 8.5 V dc to 33 V dc |
| Maximum polarity reversa | 200 ms |
| Power up time | < 20 seconds |
| Minimum ‘detector active’ voltage | 6 V |
| Power-up surge current at 24 V | 95 µA |
| Average quiescent current at 24 V | 95 µA |
| Alarm current | 12 V 20 mA 24 V 40 mA |
| Alarm load | 600 Ω |
| Holding voltage | 5 V - 33 V |
| Minimum holding current | 8 mA |
| Minimum voltage to light alarm LED | 5 V |
| Alarm reset voltage | < 1 V |
| Alarm reset time | One second |
| Alarm indicator | Integral indicator with 360º visibility |
| Remote output LED (-) characteristic | 1.2 kΩ connected to negative supply |
| Operating and storage temperature | -40ºC to +70ºC |
| Humidity (no condensation or icing) | 0% to 98% RH |
| Effect of atmospheric pressure on optical sensor | None |
| Effect of wind speed | None |
| Designed to IP Rating | IP23D |
| Standards & approvals | EN54-5, EN54-7, MED, LR, DNV-GL, BV, ABS, CCS, KRS and CRS |
| Dimensions | 97 mm diameter x 36 mm height 100 mm diameter x 51 mm height in base |
| Weight | 70 g detector 130 g detector with base |
| Materials | Housing: White flame-retardant polycarbonate |
| Terminals: | Nickel plated stainless steel |
TR