The SIF-100 series are fast response infrared radiometers with a 0.2 second response time. The analogue sensor is un-amplified and has a voltage output. Typical applications include plant canopy temperature measurement for use in plant water status estimation, road surface temperature measurement of determination of icing conditions, and terrestrial surface (soil, vegetation, water, snow) temperature measurement in energy balance studies.
Three different models with different fields of view are available:
SI-111 – 22° half-angle field of view.
SI-121 – 18° half-angle field of view.
SI-1H1 – 13° half-angle field of view in the vertical direction.
|Approximate Sensitivity||15 µV per °C|
|Output from Thermopile||Approximately -0.825 to 0.825 mV for a temperature difference from -55 to 55°C|
|Input Voltage Requirement||2500 mV excitation (typical, other voltages can be used)|
|Output from Thermistor||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||0.2s, time for detector signal to reach 95% following a step change|
|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. Additional cable available in multiples of 5 m. Santoprene rubber jacket (high water resistance, high UV stability, flexibility in cold conditions). Pigtail lead wires.|
|Warranty||4 years against defects in materials and workmanship|