Cảm biến đo nhiệt độ bề mặt Campbell Scientific SI-111SS
The SI-111SS, 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 data logger uses these measurements to calculate the correct temperature of the subject.
This radiometer features an IP67-rated, marine-grade 316L connector that allows the user to easily swap sensors for recalibration or to replace damaged cables.
Benefits and Features
- Compatible with most Campbell Scientific data loggers
- 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-111SS 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 data loggers can measure. The data logger 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.
Field of View (FOV)
The SI-111SS has a 22-degree half-angle field-of-view (FOV). The FOV is reported as the half-angle of the apex of the cone formed by the target (cone base) and the detector (cone apex). The target is a circle from which 98% of the radiation viewed by the detector is being emitted.
|Sensor||Thermopile and thermistor|
|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)|