SL-510-SS: Pyrgeometer Upward-Looking

The SL-510 is an upward-looking thermopile pyrgeometer.

  • Product Name: Pyrgeometer Upward-Looking
  • Item No.:SL-510-SS
  • Manufacturers:Apogee
  • Country of Origin:USA

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. Typical applications include longwave radiation measurement in agricultural, ecological, and hydrological weather networks and renewable energy applications. Sensor includes IP67 marine-grade stainless-steel cable connector 30 cm from head to simplify sensor removal and replacement for maintenance and recalibration.

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    Less than 1 %

Long-term Drift    Less than 2 % change in sensitivity per year

Non-linearity    Less than 1 %

Detector Response Time    Less than 0.5 s

Field of View    150˚

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