
Somfy Cell Master Pro Bitech Photocell, Safety Sensors for Gates and Garage Doors
You add a photocell when you want the drive to stop or reverse if it detects an obstacle in the passage. You reduce impact risk during closing.
BUS, NO, NC wiring
24 V SELV, Class III
Outdoor rating IP44
Up to 10 m range
What this photocell does
Safety reaction
The photoelectric beam runs between TX and RX. When something breaks the beam, the drive stops or reverses, based on your control board logic.
- Protects people, cars, and property in the gate path.
- Supports sites that run auto close.
- Reduces service calls caused by impact events.
Where it fits
- Sliding gates for villas, compounds, warehouses.
- Swing gates for residential and business entrances.
- Garage doors where vehicles and pedestrians share the same lane.

Key specifications from the datasheet
| Spec | Value | What it means for your project |
|---|---|---|
| Safety function | Stops or reverses on obstacle detection | You reduce impact risk during closing, especially with auto close setups. |
| Power supply | 24 V SELV, Class III | You match standard low voltage gate control electronics. |
| Receiver wiring modes | BUS, NO default, NC | You connect it to different control boards without replacing the photocell set. |
| Operating range | Up to 10 m | You cover most residential and light commercial entrances. |
| Ingress protection | IP44 | You install it at outdoor entrances where splashes and dust occur. |
| Operating temperature | -20°C to +60°C | You keep stable operation across seasonal conditions. |
| Maintenance | Check every 6 months, clean with a dry cloth | You keep detection reliable and reduce false issues caused by dirt. |
For outdoor sealing, the manual recommends a silicone bead at the cable entry during installation.











