Downward-Looking Thermopile Pyranometer (SP-610-SS)

Introduction to Sensor

The SP-610-SS Downward-looking Thermopile Pyranometer provides accurate shortwave solar radiation measurements with a high-precision thermopile detector and analog output (0–300 mV). Designed for agricultural, ecological, hydrological, and photovoltaic applications, it features a durable housing, flat glass dome, and an IP68 marine-grade stainless-steel connector for reliable outdoor performance and easy maintenance. It can also be paired with an upward-facing pyranometer to create a complete albedometer system.

Specifications

Specification	Value
Sensitivity	0.035 mV per W/mˉ² (typical, varies by sensor)
Calibration Factor	28.5 W/mˉ² per mV (typical, reciprocal of sensitivity)
Calibration Uncertainty (at 1000 W/mˉ²)	Less than 3%
Calibrated Output Range	0 to 70 mV
Measurement Range	0 to 2000 W/mˉ² (net shortwave irradiance)
Measurement Repeatability	Less than 1%
Long-term Drift	Less than 2% per year
Non-linearity	Less than 1%
Detector Response Time	0.5 seconds
Field of View	150°
Spectral Range (50% points)	370 to 2240 nm
Directional (Cosine) Response	Less than 20 W/mˉ² for angles between 0° and 60°
Temperature Response	Less than 5% from -15°C to 45°C
Zero Offset A	Less than 2 W/mˉ² (Less than 10 W/mˉ² when heated)
Zero Offset B	Less than 5 W/mˉ²
Uncertainty in Daily Total	Less than 5%
Operating Environment	-50°C to 80°C, 0–100% Relative Humidity
Heater	780 Ω, 15.4 mA current drain, 185 mW power requirement at 12 V DC
Dimensions	23.5 mm diameter × 27.5 mm height
Mass	100 g
Warranty	4 years against defects in materials and workmanship
Manufactured	Assembled in the USA