Humidity Sensor, High Accuracy External Sensor, Compact – Wireless Sensor Network (WSN)

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See the detailed product description below.  

This sensor has a high accuracy humidity sensor ideal for measuring relative humidity in open or enclosed locations.

We specialize in custom sensors.  If this isn’t exactly what you need, please contact us.

More Humidity Sensors

WSN System Videos

Watch Video Demonstration on Phase IV’s WSN Humidity Sensor

SKU: WSN-H1T1-0201-10 Category:


We specialize in custom sensors.  If this isn’t exactly what you need, please contact us.

  • Sensor can “transmit now” using power switch.
  • Metal Enclosure with plastic end caps.*
  • Battery Life:  Appropriately 2 to 4 years when transmitting once per hour.*
  • See industrial sensor version for 10 year battery life.
  • Humidity probe accuracy: +/- 1.8%* (10% to 90% RH)*.
  • Relative humidity operating range 0 – 100% RH*.
  • Relative humidity response time 8 sec (tau 63%)
  • Dew point is also reported but alerts cannot be set on the dew point.
  • Electronics Operating Temperature:  -40° to 85°C (-40° to 185°F)*
  • Chemical vapors at high concentration in combination with long exposure times may offset the sensor reading.
  • Radio range:  Up to 300 feet in open air.  Repeaters are available to extend range.
  • FCC, IC certified.
  • 915 MHz radio (North America).  Will not interfere with 2.4 GHz WiFi networks.  Contact us if outside North America.
  • Battery:  Standard Tadiran TL-5276/W battery.
  • Sensor Size (in inches):  1.76 wide x 2.1 high x 1.0 deep.  Wire antenna: 3.6 inches long.
  • Optional mounting tabs extend another 0.5 inches from both the top and bottom of the sensor.
  • Sensor is not sealed.  See industrial version for an IP65- water and dust protected enclosure.

*See more detailed accuracy and use specifications below (copied from the SHT25 humidity sensor data sheet).



Standard version of web-based software supports fast and easy configuration of:

  • Transmission intervals from 10 minutes to days.
  • Text and email alerts.
  • Custom sensor names.
  • Data graphing with user select-able time frames.  Graphs highlight data points outside alert limits.  Zoom-in function.
  • Download data to spreadsheets.
  • Special “Aware State” function sends sensor readings at a faster rate in critical (user defined) ranges.
  • Give it a test drive on our live demonstration Wireless Sensor Network (WSN)… go to     User Name:  demo1234    Password:  demo1234

See our Starter Kits to get a major discount in setting-up your first Wireless Sensor Network.  Our Starter Kit product page will walk you though assembling all the parts you need to get started.

For more general information about our Wireless Sensor Network, see the Practical and Off-the-Shelf Wireless Sensor Networks information page.  Also see the Getting Started with our Wireless Sensor Network page.

*See industrial version for sealed enclosure and battery life of up to 10 years.  Battery life is reduced at temperatures outside the range of +10°C to +50°C (+50°F to +122°F).

This wireless sensor is ideal for monitoring:

  • Warehouse humidity.
  • Greenhouses humidity.
  • Butterfly pavilion.
  • Saunas and humidors.
  • Art gallery and museums.
  • Mold, mildew and dust mites control.
  • Agricultural environment monitoring.
  • Home humidity level
  • Manufacturing humidity.

This sensor is not certified or intended for food or chemicals contact .