Detector – FG901
The FG901 DETECTOR series are advanced analogue addressable sensors designed for continuous, intelligent fire monitoring. Featuring a dust-resistant optical chamber, integrated short-circuit isolator, and sophisticated drift compensation technology, they deliver exceptional detection accuracy and long-term reliability with minimal maintenance.
Three Models for Complete Detection Coverage
- FG901SHD_AP — Combined optical and thermal detector (EN54-5, EN54-7, EN54-17)
- FG901SD1_AP — Optical smoke detector (EN54-5, EN54-17)
- FG901HD1_AP — Thermovelocimetric optical detector (EN54-7, EN54-17)
Intelligent Detection Technology
The optical models use a dual-transmitter, single-receiver chamber exploiting the Tyndall effect for reliable smoke detection. The multisensor FG901SHD_AP combines optical and thermal detection with a sophisticated algorithm that analyses smoke levels relative to temperature rise, programmable in AND or OR mode for maximum flexibility and false alarm immunity. Thermal detection supports both fixed-temperature and rate-of-rise modes.
Drift Compensation
An onboard drift compensation algorithm continuously adjusts for dust and contaminant accumulation in the optical chamber, maintaining the original detection threshold without the need for recalibration.
Continuous Diagnostics
Each detector communicates operating conditions, smoke darkening levels, dirt levels, and temperature data directly to the control panel. An onboard event log records the total number of fire alarms and the 5-minute period preceding each alarm — invaluable for post-incident analysis.
Simple Installation
Addressing via ONEPROGRAMMER or auto addressing — no DIP or rotary switches. Supports “T” connections. Bases include a short-circuit spring maintaining loop continuity when a sensor is removed, and sensors can be mechanically locked to the base to prevent unwanted removal.
Key Specifications (all models)
- Supply Voltage: 27V
- Standby Current: 90 µA | LED Current: 15 mA
- Operating Temperature: -30°C to +70°C
- Humidity: Up to 95% RH (non-condensing)
- Loop Capacity: Up to 240 devices over 2km cable
- Dimensions: Ø92mm × H48mm (with standard base) | Weight: 120g
- Construction: White ABS V0 / Black POM optical chamber
Certifications: Applus Certified (n°1922-CPR-1121/1122/1123) | EN54-5, EN54-7 & EN54-17 Compliant
Documents and Resources
- Description
- Size Guide
- Additional information
Description
The new series of analogue sensors of the FG901 DETECTOR range constantly monitor the f ire alarm condition. The advanced design of the optical chamber ensures excellent resistance to dust entry, which means that the sensor’s performance is not compromised. Each sensor is equipped with drift compensation, it communicates its parameters to the control unit such as operating conditions, smoke darkening levels, dirt levels and temperature levels. Each sensor can be addressed manually, by programmer or by fire detection control unit with protocol or with auto addressing by fire detection control unit with protocol.
Models:
- FG901SHD-AP
- FG901SDI-AP
- FG901HDI-AP
| size | chest(in.) | waist(in.) | hips(in.) |
|---|---|---|---|
| XS | 34-36 | 27-29 | 34.5-36.5 |
| S | 36-38 | 29-31 | 36.5-38.5 |
| M | 38-40 | 31-33 | 38.5-40.5 |
| L | 40-42 | 33-36 | 40.5-43.5 |
| XL | 42-45 | 36-40 | 43.5-47.5 |
| XXL | 45-48 | 40-44 | 47.5-51.5 |
Additional information
| Color | Black, Blue |
|---|---|
| Size | Extra Large, Large, Medium, Small |
