Features:
- Visibility measurement based on optical transmission principle
- Reliable measurement along a path of 10m parallel to the tunnel axis
- Parametrisation of the sensor via Modbus RTU (EIA-485)
- Max. external cable length of 1,000m to tunnel control system
- Signal output either via analogue and relay outputs or RS485 with MODBUS RTU protocol
- Visible LEDs show sensor status
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