The new SapIP-IRT wireless infrared (IR) temperature sensor is the latest development in IR leaf temperature sensing for use in irrigation scheduling and plant stress detection. This new system allows for up to (27) IRT sensors to be distributed throughout a field, and data to be collected with a single IRT Coordinator or gateway. Using the “Watcher” software, all data can be collected from the IRT Coordinator and stored on your computer. The data can easily be imported into a spreadsheet for analysis and graphing. Plant stress models are available and can be used to determine if, and when, your crops need irrigation, and flags are used when irrigation is required.

The SapIP-IRT sensors can be used as a stand-alone sensor with analogue output, or as part of a SapIP wireless network, whereby plant sap flow, sap velocity, soil moisture, weather, and leaf temperature, can all be monitored simultaneously in one wireless system. If SapIP nodes are used as data loggers for the IRT sensors, data can be uploaded to the AgriSensors. NET webpage. The SapIP nodes can also be “daisy-chained” several levels deep, thus allowing distances of 2-3 miles to be monitored.

The SapIP systems are versatile and flexible, and can be configured to meet your particular requirements. Also, the SapIPIRT IR temperature system can be used for other applications, and practically anywhere surface temperature readings are desired.


  • Very narrow 20 deg field of view
  • Excellent for Pivot or drip irrigation
  • Rechargeable batteries (solar- 2 W separate)
  • Up to 27 units per network on an IRT Coordinator
  • 10 sec to 60 min output timing
  • RF Zigbee output in API format
  • ±0.5º C accuracy over wide range of ambient (0-50º C)
  • 300 – 500 ft range based on antennas distance
  • Analog and SDI12 versions available