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  • PoE•X High Temperature Sensor
PoE•X High Temperature Sensor

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The Power-over-Ethernet (PoE) High Temperature Sensor uses a glass coated platinum RTD transducer to accurately measure temperatures from -50°C to +370°C (-58°F to +700°F). The High Temperature Sensor outputs the ambient temperature in degrees Celsius or Fahrenheit and alerts the user when a temperature threshold is 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: -50°C to +370°C. (-58°F to 700°F)
  • Good for high temperature applications.

Data Snapshot

High temperature sensor data view in software

High Temp - RTD / Thermistor Specifications

Lead Wire Length Stainless steel metal probe tip (5mm diameter, 30mm length) (0.197 in. diameter, 1.18 in. length)
RTD Temperature Range -50°C to +370°C ( -58°F to +700°F )
RTD Accuracy at 0°C +/- 3.3°C Standard (+/- 0.5°C Calibrated **)
Thermal Time Constant 15 sec. max.
Weight 6.38 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 +/- 3.3°C Standard (+/- 0.5° C Calibrated)
Dissipation Constant @ 25°C 2mW/°C
IEEE Standard Compliance 802.3AF-2003 / 802.3AT-2009 Class 1
Input Power Supplementary Power Requirement
Response Time 20 sec max
Specifications Image

Suggested Application Uses for This Sensor

  • Boiler temperature monitoring to detect boiler failures
  • Heater temperature monitoring
  • Ovens and cooking device monitoring
  • Smart machines and smart structures
  • HVAC system monitoring to detect failures or heating / Cooling issues