Infrared radiometers in a range of models for measuring the temperature of vegetation or other surfaces
Measurement of surface temperature is a crucial component of energy transfer. Accurate measurement of the leaf-to-air temperature gradient is essential to the determination of the transpiration rate and stomatal conductance in both single leaves and plant canopies. This gradient is often less than 1oC, which means that leaf temperature should be measured to within 0.2oC.
To achieve this accuracy, the Apogee Instruments precision Infrared Radiometers measure two temperatures. The primary thermocouple is used to measure the sensor body temperature. The output follows fundamental physics of the Stefan-Boltzmann Law allowing for a version of the S-B equation to correct for the effect of sensor body temperature.
Most accurate infrared radiometer on the market
Measures surface temperature rapidly
Uncertainty of 0.2°C (95% confidence)
8-14 m germanium atmospheric window
Radiation shield included
Multiple field of view (FOV) options
Calibrated target temperature range from -30 to 65°C
Rugged and lightweight
Four year warranty
Output - Models with analogue or digital (SDI-12) output
Water resistant, designed for continuous outdoor use
SI-111: Field of view 22° half angle, analogue output
SI-121: Field of view 18° half angle, analogue output
SI-131: Field of view 14° half angle, analogue output
SI-1H1: Field of view 32° horizontal, 13° vertical, analogue output
SI-411: Field of view 22° half angle, SDI-12 output
SI-421: Field of view 18° half angle, SDI-12 output
SI-431: Field of view 14° half angle, SDI-12 output
SI-4H1: Field of view 32° horizontal, 13° vertical, SDI-12 output
About the manufacturer
Apogee manufacture a specialised range of sensors for biophysical studies including light sensors, oxygen and surface temperature (IR) sensors.
All Apogee products are covered by an industry-leading four-year warranty against failure due to defects in materials and workmanship.