Apogee Instruments is pleased to announce the release of our radiation frost detection sensor, the SF-110. The SF-110 is a combination of two temperature sensors (precision thermistors) in a single housing. One sensor is designed to mimic a plant leaf and the other a flower bud. The SF-110 provides close approximations to leaf and bud temperatures and can be used for prediction of frost on leaves and buds.
The temperature measurement range of the SF-110 is -40 to +70 °C with an accuracy of ± 0.1 °C from 0 to +70 °C. However, the sensor is intended for applications in cropped fields and orchards when temperatures will be near freezing, and where air temperature measurements are not a good predictor of frost formation (Figure 1). The SF-110 offers a simple and effective method of helping growers determine when to initiate expensive frost protection measures, thereby saving crops in addition to operating costs. For more information on the SF-110 please click here.
 “Frost/Freeze Protection for Horticulture Crops”, URL: http://www.ces.ncsu.edu/depts/hort/hil/hil-705.html
 Kala, J., T.J. Lyons, I.J. Foster, U.S. Nair, 2009. Validation of a simple steady-state forecast of minimum nocturnal temperatures. Journal of Applied Meteorology and Climatology 48:624-633.
 Lhomme, J.P. and L. Guilioni, 2004. A simple model for minimum crop temperature forecasting during nocturnal cooling. Agricultural and Forest Meteorology 123:55-68.
Customer Support and Technical Manager