S4 Self Test Detectors
Gent S4T-770-S Self-Test Optical Heat Sensor + Sounder
- Operating voltage
- 35V - 48V
- Ambient operating temperature
- -10 °C to +50 °C
- Storage temperature
- -20 °C to +65 °C
- Relative humidity
- 95 % non-condensing (+5 °C to +45 °C)
- Ingress protection
- IP21C
- Enclosure material
- Terluran GP-35 (ABS) for outer housing
- Quiescent current
- 2 mA average and 4.5 mA maximum in Turbo mode (Refer to Battery Standby and Loop Load Calculator Tool.)
Required to operate
Needed to install, power or certify this product.
Base - Common for all S-Quad Sensors
Mounting base common to all S-Quad Self-Test sensors
Overview
What it is and how it fits the system.
The Gent S4T-770-S is an S4 SELF-TEST Optical Heat Sensor and Sounder in the S-Quad Self-Test (S4T) series, combining an optical smoke sensor and heat sensor with an integrated sounder. It operates on a 35V-48V loop, drawing 2mA average (4.5mA in Turbo mode), and is rated IP21C. The ABS sensor head measures 117mm in diameter by 63mm high and weighs 152g.
Technical overview
The S4T-770-S from Gent by Honeywell is an S4 SELF-TEST Optical Heat Sensor and Sounder in the S-Quad Self-Test (S4T) series, combining optical and heat sensing with an integrated sounder. It operates on a 35V-48V loop, drawing 2mA average quiescent current and up to 4.5mA in Turbo mode. The device is rated IP21C for ingress protection and functions within an ambient operating temperature range of -10°C to +50°C, with storage limits from -20°C to +65°C and relative humidity tolerance of 95% non-condensing between +5°C and +45°C.
Constructed with a Terluran GP-35 (ABS) enclosure, the sensor head measures 117mm in diameter by 63mm in height, increasing to 70mm when mounted on the standard base. Weight is 152g for the sensor head alone, or 212g with the S4-700 base installed. Additional specifications include air velocity tolerance of 0 to 20m/s for fire detection and 0 to 1.5m/s around the device, a Bluetooth range of 10m, and a heat self-test temperature range of 0 to 40°C expected. The unit is available in white (RAL 9010) or black (RAL 9005) finishes and holds LPCB approval with CE and UKCA marking. Compatible accessories include the S4-700 mounting base, S4-705 IP21 base covers, S4-FLUSH semi-flush kit, and 13449-01 remote LED.
Specifications
Full technical data for this part.
| Operating voltage | 35V - 48V |
|---|---|
| Ambient operating temperature | -10 °C to +50 °C |
| Storage temperature | -20 °C to +65 °C |
| Relative humidity | 95 % non-condensing (+5 °C to +45 °C) |
| Ingress protection | IP21C |
| Colour | White : RAL 9010 Black : RAL 9005 |
| Enclosure material | Terluran GP-35 (ABS) for outer housing |
| Dimensions | Sensor head: 117 mm diameter by 63 mm height (with Base the height increases to 70 mm) |
| Weight | Sensor head only: 152 g (with Standard base - 212 g) |
| Quiescent current | 2 mA average and 4.5 mA maximum in Turbo mode (Refer to Battery Standby and Loop Load Calculator Tool.) |
| Air velocity for fire detection | 0 to 20 m/s |
| Air velocity around device | 0 to 1.5 m/s |
| Bluetooth range | 10m |
| Heat self test temperature range | 0 to 40 °C expected |
Specifications sourced from manufacturer documentation.
Specifications per manufacturer documentation, subject to change — E&OE. Spotted an inaccuracy? Let us know
Enhancements (optional)
Optional additions — this product works without them.
S-Quad Semi-Flush Mounting Kit
Semi-flush mounting kit for S-Quad Self-Test device
Remote LED (for use with common base S4-700)
External repeat LED driven by device I/O
Compare variants
Alternatives in the same range — pick the variant that fits your install.
S4 SELF TEST Dual Optical Heat Sensor + Sounder
