The SL-510 is an upward-looking thermopile pyrgeometer. The sensor incorporates a filter, blackbody thermopile detector, and thermistor with a rugged, self-cleaning sensor housing design, and high-quality cable terminating in pre-tinned pigtail leads for easy connection to dataloggers and controllers. Typical applications include longwave radiation measurement in agricultural, ecological, and hydrological weather networks and renewable energy applications.Sensor includes IP68 marine-grade stainless-steel cable connector 30 cm from head to simplify sensor removal and replacement for maintenance and recalibration.
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Current Stock:
Sensitivity
0.12 mV per W mˉ² (variable from sensor to sensor, typical value listed)
Calibration Factor (Reciprocal of Sensitivity)
8.5 W mˉ² per mV (variable from sensor to sensor, typical value listed)
Calibration Uncertainty
± 5 %
Measurement Range
-200 to 200 W mˉ² (net longwave irradiance)
Measurement Repeatability
不到1%
Long-term Drift
Less than 2 % change in sensitivity per year
Non-linearity
不到1%
Detector Response Time
Less than 0.5 s
Field of View
180˚
Spectral Range
5 to 30 µm
Temperature Response
Less than 5 % from -15 to 45 C
Window Heating Offset
Less than 10 W mˉ²
Zero Offset B
Less than 5 W mˉ²
Tilt Error
Less than 0.5 %
Uncertainty in Daily Total
± 5 %
Temperature Sensor
30 kΩ thermistor, ± 1 C tolerance at 25 C
Output from Thermistor
0 to 2500 mV (typical, other voltages can be used)
Input Voltage Requirement for Thermistor
2500 mV excitation (typical, other voltages can be used)
Heater
780 Ω, 15.4 mA current draw and 185 mW power requirement at 12 V DC
Dimensions
37.5 mm height, 23.5 mm diameter
Mass
90 g
Warranty
4 years against defects in materials and workmanship
