1-Wire UNI Light Probe

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A 1-Wire UNI Light Probe for indoor use with ARES and Poseidon2 monitoring devices to generate an alarm over SNMP, MODBUS/TCP or SMS when the light within a server room or cabinet changes.


  • Illuminance: 0-100%, +/- 10%
  • Operating Environment: minus 30 to 85degC / 0 -100%RH


Poseidon2 Light Sensor Diagram

The device is a simple light intensity sensor for indoor use. Each sensor has a unique serial number, and several can be connected in parallel to a single RJ11 bus. The sensors are typically used to detect lights on/off in a server room indicating whether staff are present or not, or a server rack door being opened.