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SIL-111: Standard Field of View Commercial Infrared Radiometer Sensor

Updated:2025-03-13

Brand: Apogee
Model: SIL-11
Description: The SIL-111 is an unamplified analog sensor with a voltage output and high-quality cable terminating in pre-tinned pigtail leads for easy connection to dataloggers and controllers. The sensor has a 22
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Product Details

SIL-111: Standard Field of View Commercial Infrared Radiometer Sensor Functional Characteristic：

User's Manual Technical Drawing

The SIL-111 is an unamplified analog sensor with a voltage output and high-quality cable terminating in pre-tinned pigtail leads for easy connection to dataloggers and controllers. The sensor has a 22° 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.

SIL-111: Standard Field of View Commercial Infrared Radiometer Sensor Drawing：

SIL-111 Drawing

SIL-111: Standard Field of View Commercial Infrared Radiometer Sensor Specification：

Approximate Sensitivity	50 μV per C difference between target and detector temperature
Output from Thermopile	Approximately -3.3 to 3.3 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 (0 to 50 C), when target and detector temperature are within 20 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 a clean condition
Response Time	0.6 s, time for detector signal to reach 95 % following a step change
Field of View	22° 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 5m of lead wire)
Cable	5 m of six conductor, shielded, twisted-pair wire; TPR jacket (high water resistance, high UV stability, flexibility in cold conditions); pigtail lead wires
Warranty	4 years against defects in materials and workmanship