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Apogee Instruments SI-121 Narrow Field of View Infrared Radiometer Click here to enlarge
SI-121 Narrow Field of View Close Up Click here to enlarge
SI-121-SS: Research-Grade Narrow Field of View Infrared Radiometer Sensor Click here to enlarge
Apogee Instruments SI-121 Narrow Field of View Infrared Radiometer Click here to enlarge
SI-121-SS: Research-Grade Narrow Field of View Infrared Radiometer Sensor Click here to enlarge
Apogee Instruments SI-121 Narrow Field of View Infrared Radiometer Click here to enlarge
Apogee Instruments SI-121 Narrow Field of View Infrared Radiometer SI-121 Narrow Field of View Close Up SI-121-SS: Research-Grade Narrow Field of View Infrared Radiometer Sensor Apogee Instruments SI-121 Narrow Field of View Infrared Radiometer SI-121-SS: Research-Grade Narrow Field of View Infrared Radiometer Sensor Apogee Instruments SI-121 Narrow Field of View Infrared Radiometer

SI-121-SS: Research-Grade Narrow Field of View Infrared Radiometer Sensor

$689.00

The SI-121 is an unamplified analog sensor with a voltage outputand high-quality cable terminating in pre-tinned pigtail leads for easy connection to dataloggers and controllers. The sensor has a 18° half-angle field of view and a response time of 0.6 seconds. 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.Sensor includes IP68 marine-grade stainless-steel cable connector 30 cm from head to simplify sensor removal and replacement for maintenance and recalibration.

FOR MORE PRODUCT INFORMATION, CHECK OUT THESE LINKS

•ProductManual

•Specification Sheet

•Technical Drawing

MORE INFORMATION ON APOGEE INFRARED RADIOMETERS >>click here

Full Description
Where to Buy

The SI-121 is an unamplified analog sensor with a voltage outputand high-quality cable terminating in pre-tinned pigtail leads for easy connection to dataloggers and controllers. The sensor has a 18° half-angle field of view and a response time of 0.6 seconds. 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.Sensor includes IP68 marine-grade stainless-steel cable connector 30 cm from head to simplify sensor removal and replacement for maintenance and recalibration.

FOR MORE PRODUCT INFORMATION, CHECK OUT THESE LINKS

•ProductManual

•Specification Sheet

•Technical Drawing

MORE INFORMATION ON APOGEE INFRARED RADIOMETERS >>click here

Current Stock:
Approximate Sensitivity 40 µV per C Output from Thermopile Approximately -2.2 mV to 2.2 mV for a temperature difference from -55 to 55 C Output from Thermistor 0 to 2500 mV (typical, depends on input voltage) Input Voltage Requirement 2500 mV excitation (typical, other voltages can be used) Calibration Uncertainty (-30 to 65 C) 0.2 C, when target and detector temperature are within 20 C Calibration Uncertainty (-40 to 80 C) 0.5 C, when target and detector temperature are different by more than 20 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 a clean condition Response Time 0.6 s, time for detector signal to reach 95 % following a step change Field of View 18˚ half-angle Spectral Range 8 to 14 µm; atmospheric window Operating Environment -50 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 four conductor, 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

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