S4 Black Detectors
Gent S4BK-711 Dual Optical Heat Sensor, Black
- Max quantity per loop
- 200
- Operating voltage
- 35V - 48V
- Ambient operating temperature
- -10ºC to 50ºC
- Storage temperature
- -20ºC to 70ºC (CO is -20ºC to 50ºC)
- Relative humidity
- 95% non condensing (25 º C to 45 º C)
- Weight
- 110g (170g with base)
- Ingress protection
- Ingress Protection with standard base: IP30
Required to operate
Needed to install, power or certify this product.

Black Base - Common for all S-Quad Sensors
Mounts on the S4-700 / S4BK-700 Sensor base (White/Black)

Base - Common for all S-Quad Sensors
Mounts on the S4-700 / S4BK-700 Sensor base (White/Black)

Black IP21 base covers (pack 5)
Mounts on the IP 21 Sensor Base for S-Quad (S4-701 / S4-705 / S4BK-705)

IP21 base and base cover (pack of 1)
Mounts on the IP 21 Sensor Base for S-Quad (S4-701 / S4-705 / S4BK-705)

IP21 base covers (pack 5)
Mounts on the IP 21 Sensor Base for S-Quad (S4-701 / S4-705 / S4BK-705)
Overview
What it is and how it fits the system.
The Gent S4BK-711 is a Dual Angle Optical Heat Sensor in black from the S-Quad range, combining dual angle optical and heat detection in a single multi-sensor head. It operates on a 35V-48V loop across an ambient range of -10°C to 50°C and supports up to 200 devices per loop. The 117mm-diameter head weighs 110g, finished in black ABS HF380.
Technical overview
S4BK-711 is the Dual Angle Optical Heat Sensor (Black) from the Gent by Honeywell S-Quad range. It combines dual angle optical and heat detection in a single multi-sensor head, operating on a 35V-48V loop across an ambient temperature range of -10°C to 50°C and supporting up to 200 devices per loop. The 117mm-diameter head weighs 110g and is finished in black ABS HF380.
This sensor features an O2H symbol and is designed for use with S4-700 or S4BK-700 sensor bases in white or black, as well as IP21 sensor bases (S4-701, S4-705, S4BK-705) for enhanced ingress protection. It forms part of the Gent by Honeywell Vigilon S-Quad sensor range, offering backward compatibility through appropriate system upgrades. Physical wiring and terminal connections are detailed in the installation manual.
Specifications
Full technical data for this part.
| Description | Dual Angle Optical Heat Sensor (Black) |
|---|---|
| Symbol | O2H |
| Max quantity per loop | 200 |
| Operating voltage | 35V - 48V |
| Ambient operating temperature | -10ºC to 50ºC |
| Storage temperature | -20ºC to 70ºC (CO is -20ºC to 50ºC) |
| Relative humidity | 95% non condensing (25 º C to 45 º C) |
| Weight | 110g (170g with base) |
| Dimensions | Diameter=117mm: height=49.6mm (height increases to 63.8mm with base) |
| Colour | Black (RAL 9010 white / Black as material colour ABS HF380 Black) |
| Enclosure materials | ABS |
| Ingress protection | Ingress Protection with standard base: IP30 |
Specifications sourced from manufacturer documentation.
Specifications per manufacturer documentation, subject to change — E&OE. Spotted an inaccuracy? Let us know