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Product Model

Liebert SN-3C Sensor

The Liebert SN-3C modular sensor is a three dry contact input monitor sensor with a two connection points to allow for a custom string design. Liebert SN sensors are designed to assist in monitoring conditions within a rack and can be placed in any area to read door status.

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Best Suited For:
  • Banking, Financial and Insurance
  • Data Center/Colocation/Hosting
  • Education
  • Government
  • Healthcare
  • Manufacturing
  • Telecom
Warranty: One Year Limited Warranty Against Defects in Material and Workmanship.


Highly flexible configurations
Fast installation and operation
Can be connected in a string that includes a combination of modular and integrated sensors


Can be connected in a string that includes a combination of modular and integrated sensors
Compatible with the Liebert MPX and Liebert MPH rack PDUs, Liebert RDU-S monitoring devices and Liebert IS-UNITY DP Communications Card
Available as integrated sensors that can be placed in any area, including within a rack, to monitor temperature and humidity levels
Available as modular sensors with separate probes and cables to monitor temperature, humidity, door switches, smoke and water detection.
Integrated configurations (cable and sensor integrated):
- SN-Z01 - Integrated cable with a single temperature probe
- SN-Z02 - Integrated cable with three temperature probes
- SN-Z03 - Integrated cable with three temperature probes and a single humidity probe
Modular configurations (cables and sensors separate):
- SN-T – Single temperature sensor with 1 probe
- SN-TH – Single temperature and humidity sensor with 2 probes
- SN-2D – Door switch, with 1 probe
- SN-3C – Digital input, with 3 inputs
- Liebert SN-L - Leak detection, with 20’ long detection cable compatible with the Liebert IS-UNITY-DP communications card.

Liebert SN-3C Sensor
Technical Specifications
Product Line
Supplied bracket or cable tie
Power Input
Through communications cable
Operating Environment
41 to 131 degree F
Environmental Sensors
Three Dry Contact Modular Temperature
Direct Integration
Unity and RPC2
0.25 lb
0.11 kg
1.625 in
41 mm
2 in
51 mm
0.75 in
19 mm

*To see model-specific downloads, you will need to go to the model-specific product page by selecting the model name in the specifications chart above.

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Products Support Contacts

Showing contacts for Virginia, 20149, USA Change
Geist Support - Americas (Rack PDU and Watchdog)
+1 888 630 4445
1777 Yolande Avenue Lincoln Nebraska USA
Product areas of focus: Power Distribution, Monitoring
Vertiv (Customer Service for Albér Products)
+1 954 377 7101
7775 West Oakland Park Blvd Sunrise Florida 33351 USA
Product areas of focus: Monitoring
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