The SIF-1H1 is a fast response model infrared radiometer with a 0.2 second response time. The analog sensor is un-amplified and has a voltage output. The unique geometry of the sensor gives a wide 32° half-angle field of view in the horizontal direction with a 13° half-angle field of view in the vertical direction. This enables the user to mount the sensor at shallower angles without seeing above the horizon while maximizing the area measured. Typical applications include plant canopy temperature measurement for use in plant water status estimation, phenotyping, phenomics, road surface temperature measurement of determination of icing conditions, and terrestrial surface (soil, vegetation, water, snow) temperature measurement in energy balance studies. Sensor includes IP67 marine-grade stainless-steel cable connector 30 cm from head to simplify sensor removal and replacement for maintenance and recalibration
Approximate Sensitivity 10 µV per C
Output from Thermopile Approximately -0.55 to 0.55 mV for a temperature difference from -55 to 55 C
Output from Thermistor 2500 mV excitation (typical, other voltages can be used)
Input Voltage Requirement 0 to 2500 mV (typical, depends on input voltage)
Measurement Range -60 to 110 C (uncertainty has been determined for the ranges below)
Calibration Uncertainty (-20 to 65 C) 0.2 C
Calibration Uncertainty (-40 to 80 C) 0.5 C
Measurement Repeatability Less than 0.05 C
Stability (Long-term Drift) Less than 2 % change in slope per year when germanium filter is maintained in clean condition
Response Time 0.2 s, time for detector signal to reach 95 % following a step change
Field of View 32˚ horizontal half-angle; 13˚ vertical half-angle
Spectral Range 8 to 14 µm; atmospheric window
Operating Environment -55 to 80 C; 0 to 100 % relative humidity (non-condensing)
Dimensions 23 mm diameter, 60 mm length
Mass 190 g (with 5 m of lead wire)
Cable 5 m of shielded, twisted-pair wire with TPR jacket (high water resistance, high UV stability, flexibility in cold conditions), additional cable available
Warranty 4 years against defects in materials and workmanship
