System Sensor D4S is a 4-wire photoelectric sensor. The power board of the D4240 may be used to monitor a second sensor, D4S, simultaneously.
| Make | System Sensor |
|---|---|
| Manufacturer | System Sensor |
| Model code | D4S |
| Type | Smoke |
| Additional info |
System Sensor D4S is a 4-wire photoelectric sensor. The power board of the D4240 may be used to monitor a second sensor, D4S, simultaneously. |