Instrument Expert
Original factory packaging
Service Hotline：
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Instrument Expert
Original factory packaging
Service Hotline：
(+86)010-52867771
Updated:2025-03-13
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User's Manual
The SP-212 is an amplified sensor with a 0 to 2.5 V output. The sensor incorporates a silicon-cell photodiode 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 shortwave radiation measurement in agricultural, ecological, and hydrological weather networks. Sensors are also used to optimize photovoltaic systems. Sensor includes IP68 marine-grade stainless-steel cable connector to simplify sensor removal and replacement for maintenance and recalibration.
Apogee Instruments SP series pyranometers consist of a cast acrylic diffuser (filter), photodiode, and signal processing circuitry mounted in an anodized aluminum housing, and a cable to connect the sensor to a measurement device. Sensors are potted solid with no internal air space and are designed for continuous total shortwave radiation measurement on a planar surface in outdoor environments. SP series sensors output an analog voltage that is directly proportional to total shortwave radiation from the sun. The voltage signal from the sensor is directly proportional to radiation incident on a planar surface (does not have to be horizontal), where the radiation emanates from all angles of a hemisphere.
| ISO 9060:2018 | Class C (fast response) |
| Power Supply | 5 to 24 V DC |
| Current Draw | 300 μA |
| Sensitivity | 1.25 mV per W mˉ2 |
| Calibration Factor | 0.8 W mˉ2 per mV (reciprocal of sensitivity) |
| Calibration Uncertainty at 1000 W mˉ2 | Less than 3 % |
| Calibrated Output Range | 0 to 2.5 V |
| Measurement Repeatability | Less than 1 % |
| Non-stability (Long-term Drift) | Less than 2 % per year |
| Non-linearity | Less than 1 % (up to 2000 W mˉ2, maximum radiation measurement is 2000 W mˉ2) |
| Response Time | Less than 1 ms |
| Field of View | 180° |
| Spectral Range | 360 to 1120 nm (wavelengths where response is 10 % of maximum) |
| Directional (Cosine) Response | ± 5 % at 75? zenith angle |
| Temperature Response | 0.04 ± 0.04 % per C |
| Operating Environment | -40 to 70 C; 0 to 100 % relative humidity; can be submerged in water up to depths of 30 m |
| Dimensions | 30.5 mm diameter, 37 mm height |
| Mass (with 5 m of cable) | 140 g |
| Warranty | 4 years against defects in materials and workmanship |
| Manufactured | Made in the USA |
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