The Hukseflux DR20 and DR15 direct pyrheliometers are high‑precision solar radiation sensors with ISO 9060 A/B class, window heating and low‑power analog…
The DR20 (Class A) and DR15 (Class B) direct pyrheliometers feature a precision‑grinded quartz window, a compact collimating tube and a black‑coated thermopile sensor. Both models include a 1 W heater (12 VDC) that suppresses dew and frost, providing high data availability with very low power consumption.
These sensors are intended for solar energy surveys, resource assessments, meteorological networks and sites prone to dew or frost. They deliver a millivolt‑range analog output and meet ISO 9060:2018 specifications, offering excellent accuracy and temperature response for vertical solar irradiance measurements.
| ISO class (DR20) | Class A |
|---|---|
| ISO class (DR15) | Class B |
| Heater power | 1 W at 12 VDC |
| Operating temperature range | -40 °C to +80 °C |
| Temperature response (DR20) | < ±0.5 % (-10 to +40 °C) |
| Temperature response (DR15) | < ±1 % (-10 to +40 °C) |
Both models use a 1 W heater powered at 12 VDC.
The DR20 is ISO 9060 Class A and the DR15 is ISO 9060 Class B.
They are rated for operation from –40 °C to +80 °C.