The SIL-4H1 has an SDI-12 digital output and high-quality cable terminating in pre-tinned pigtail leads for easy connection to dataloggers and controllers. The unique geometry of the sensor gives a wide 32° half-angle field of view in the horizontal/horizontal direction with a 13° half-angle field of view in the vertical/horizontal direction. This enables the user to mount the sensor at shallower angles without seeing above the horizon while maximizing the area measured. The sensor has a response time of 0.1 seconds. The SIL-4H1 is designed to be mounted with an Apogee AM-250 commercial-grade mounting bracket.
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.
The IR sensor can be removed from the shield and rotated to either a vertical or horizonal orientation.
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RESEARCH-GRADE VS COMMERCIAL-GRADE
| Research-Grade | Commercial-Grade | |
|---|---|---|
| Accuracy | ± 0.2 C from -30 to 65 C | ± 0.5 C from 0 to 50 C |
| Shield Material | Powder-coated aluminum with a polished interior | Rugged, polished, UV-resistant ASA plastic |
| Field of View | Three circular with two horizontal apertures | One circular and one horizontal aperture |
| Cost | More accurate with higher cost | Less accurate with lower cost |
| Cable Connector | IP68 stainless-steel cable connector to simplify sensor removal | No connector |
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