Real-time Warning on Radiation Frost Events

In stock (can be backordered)



The Real-time Warning on Radiation Frost Events solution includes:

This is all you need to accurately monitor in real-time radiation frost events and to transmit sensor data to your portal or application.

Radiation Frost Events

Know when a radiation frost events occurs – get and alert on potential frost damages to your crops.

At night time if the sky is colder than the ground, there is a continuous flux of radiation to the cold night sky. Surface can get very cold. It is underappreciated how cold surfaces can actually get at night when the sky is clear and there is no wind. Under these conditions, plant leaves and buds surface temperature drops. Radiation frost occurs when leaf and buds surface freezes although air temperature never got below zero °C.

Set Your Crops Up for Success

Monitoring leaf and bud surface temperature is a critical factor that every farmer should consider in order to take appropriate action (turn on fans) to protect cropped fields, orchards, vineyards and flowers.

Contact us to inquire not just about sensors and work management bud also pest control, disease models and irrigation.

Typical Applications

  • Agriculture

Radiation Frost – Principles of Environmental Measurement Lecture 6

Dr. Bruce Bugbee discusses radiation frost, how it is related to net radiation, and Apogee’s radiation frost detector. This is part 6 of 9 in a series of ICT International and Apogee Instruments lectures that took place at the Hawkesbury Institute for the Environment campus of the Western Sydney University –

Additional information

Zone / Region

RC1 – Europe, Oman, Iran, South Africa, RC2 – USA, Mexico, Brazil, RC3 – Japan, RC4 – Australia, New Zealand, Singapore, Taiwan, Hong Kong, Argentina, Chile, Colombia, Costa Rica, Ecuador, El Salvador, Malaysia, Panama, Taiwan

Measurement Range

-50 to 70 °C

Measurement Uncertainty

0.1 °C (from 0 to 70 °C), 0.2 °C (from -25 to 0 °C), 0.4 (from -50 to -25 °C)

Measurement Repeatability

Less than 0.05 °C

Long-term Drift (Non-stability)

Less than 0.02 °C per year (when used in non-condensing environments where the annual average temperature is less than 30 °C, continuously high temperatures or continuously humid environments increase drift rate)

Equilibration Time

10 s


Less than 0.01 °C (typical, assuming pulsed excitation of 2.5 V DC), 0.08 °C at 5 °C (maximum, assuming continuous input excitation of 2.5 V DC)

Operating Environment

-50 to 70 °C : 0 to 100 % relative humidity

Sensor Dimensions

175 mm length, 22 mm pipe diameter, 60 mm disk diameter

Sensor Mass

75 g

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