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  • PoE•X Dry Contact Sensor
PoE•X Dry Contact Sensor

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The Monnit Power-over-Ethernet (PoE) Dry Contact Sensor detects when there is contact between the two wired endpoints. It can easily be integrated into existing switches or contact plates. When the sensor detects contact between the two endpoints, it will immediately transmit the data to iMonnit, allowing the user to immediately receive an SMS text or email alert. The sensor can be configured to detect both closed and open loops alerting if contact is made or broken.

The Power-over-Ethernet (PoE) Sensor products measure various conditions (environmental, power, access). All devices come with flexible settings — including notifications, alerts, reports, and maps — can be customized in the iMonnit online sensor management interface.

No PoE infrastructure in your building? Plug the PoE•X Sensors into your Ethernet network and then power the sensors with the optional AC power supply.

Click here to view all Monnit Power over Ethernet Sensors.

  WARNING: Use caution when interfacing to Monnit and ALTA Dry Contact Sensors. Any external AC or DC Voltages WILL DAMAGE the electronics of the wireless sensor. Monnit is not responsible for troubleshooting, replacing or reimbursing damages incurred by disregarding this warning.


  • Senses immediate contact between wires.
  • Can also sense when contact is broken.
  • Variety of lead lengths available.

Data Snapshot

Dry contact sensor data view in software

Dry Contact Specifications

Lead Wire Length 3 ft. (36 in.)
Detection Wires High Impedance
Weight 5.06 oz. (143 g)

Variation Specifications

Hardware 10 / 100 Ethernet Controller
Operation Full- and Half-Duplex
Cross-Over Correction Automatic MDI / MDI-X
Protocols Supported DHCP, DNS, NTP, UDP, TCP, SNMP, Modbus TCP
Cable Connector RJ45
Device Memory Up to 50,000 sensor messages; varies based on sensor type. (Sensor messages will be stored in the event of Internet outage and transferred when connection is restored.)
Operating Temperature -20 to +60°C (-4 to 140°F)
Storage Temperature: -40 to +85°C (-40 to 185°F)
Input Power Supplementary Power Requirement
IEEE Standard Compliance 802.3AF-2003 / 802.3AT-2009 Class 1
Specifications Image

Suggested Application Uses for This Sensor

  • Tamper Switches
  • Barn door access monitoring
  • Freezer / cooler door access
  • Freezer / cooler doors (to determine if they are not closed all the way)
  • Convenience store cooler doors (to determine if they are not closed all the way)
  • Forklift seat switches