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  • PoE•X Low Temperature Sensor
PoE•X Low Temperature Sensor

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The Power-over-Ethernet (PoE) Low-Temperature Sensor uses a glass-coated platinum RTD transducer to accurately measure temperatures from -200°C to +162°C (-328°F to 325°F). The Low-Temperature Sensor outputs the ambient temperature in degrees Celsius or Fahrenheit and alert the user when a temperature threshold has been crossed.

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.


  • Accurate to +/- 0.3°C @ 0°C.
  • RTD temperature range: -200°C to +162°C (-328°F to +325°F)
  • Good for extremely low temperature applications.

Data Snapshot

Monnit low temperature sensor data view in software

Low Temp - RTD / Thermistor Specifications

Sensing Element DIN 43760 Class B
Thermal Time Constant 15 sec max.
RTD Temperature Range -200°C to +162°C (-328°F to +325°F)
RTD Accuracy at 0°C +/- 3.3°C Standard (+/- 0.5°C Calibrated)
Weight 3.7 oz.

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)
Accuracy @ 25°C +/- 3.3° C Standard (+/- 0.5° C Calibrated)
Dissipation Constant @ 25°C 2mW/°C
Data Rate Auto configures to best rate for maximum range.
IEEE Standard Compliance 802.3AF-2003 / 802.3AT-2009 Class 1
Input Power Supplementary Power Requirement
Response Time 20 sec max
Lead Wire Length Stainless steel metal probe tip (5mm diameter, 30mm length) (0.197 in. diameter, 1.18 in. length)

Suggested Application Uses for This Sensor

  • Environmental monitoring
  • Smart machines and smart structures
  • Cadaver storage cooler temperature monitoring
  • HVAC system monitoring to detect failures or heating / cooling issues