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Bức xạ kế hồng ngoại Campbell Scientific SI-111
The SI-111, manufactured by Apogee, is a precision infrared radiometer that determines the surface temperature of an object without physical contact. It measures both the subject's surface temperature and the sensor-body temperature. A Campbell Scientific datalogger uses these measurements to calculate the correct temperature of the subject.
Compatible with most Campbell Scientific dataloggers
Measures surface temperature continuously in the field
Provides road surface, plant canopy, soil surface, snow surface, and water surface temperature measurements
Avoids influencing the temperature providing more accurate measurements
Ideal for providing spatial averages
Rugged construction—two temperature probes housed in an aluminum body with a germanium window
The SI-111 consists of a thermopile, which measures surface temperature, and a thermistor, which measures sensor body temperature. The two temperature sensors are housed in a rugged aluminum body that contains a germanium window.
Both the thermopile and the thermistor output a millivolt signal that most of our dataloggers can measure. The datalogger uses the Stefan-Boltzman equation to correct for the effect of sensor body temperature on the target temperature. The corrected readings yield an absolute accuracy of ±0.2°C from -10° to 65°C.
|Input Power||2.5 V excitation (for thermistor)|
|Response Time||< 1 s (to changes in target temperature)|
|Target Temperature Output Signal||60 μV per °C difference from sensor body|
|Body Temperature Output Signal||0 to 2500 mV|
|Wavelength Range||8 to 14 μm (corresponds to atmospheric window)|
|Field of View (FOV)||22° half angle|
|Operating Temperature Range||-55° to +80°C|
|Operating Relative Humidity Range||0 to 100% RH|
|Cable Description||4.5 m (14.76 ft) twisted, shielded 4-conductor wire with Santoprene casing, ending in pigtails|
|Diameter||2.3 cm (0.9 in.)|
|Length||6 cm (2.4 in.)|
|Weight||190 g (6.7 oz)|