DR01 FIRST CLASS PYRHELIOMETER The DR01 is a research grade normal incidence direct solar irradiance sensor (also known as a pyrheliometer). Suitable for tracker mounted operation, the DR01 is intended for short-wave direct solar irradiance measurement of the sun. The DR01 is a ‘First Class’ compliant pyrheliometer, as per the latest ISO and WMO standards. 1 10 2 3 4 5 6 3 8 9 Figure 1: DR01 pyrheliometer: (1) protection cap, (2) window with heater, (3) sight, (5) sensor, (7) humidity indicator, (10) cable for heater 375 ø38 50 10 233 Figure 2: DR01 dimensions 7 INTRODUCTION The DR01 foreoptic assembly features a precision ground and polished quartz window/lens, for true spectral solar transmission ranging from 0.2 - 4.0 μm. As per the latest ISO-9060 and WMO standards, the full opening view angle of the DR01 is collimated precisely to 5.0° degrees, making the sensor ideally suited for normal incidence direct solar irradiance measurement. Capable of measuring up to two suns, 2000 W/m2, the DR01 pyrheliometer can be deployed anywhere on earth. The instrument employs a passive thermopile-based sensing technology that generates a low level DC millivolt output signal proportional to the normal incident direct solar flux received at the detector surface. The DR01 also features a thermally isolated low power window/lens heater in the foreoptic; when cycled on/off prior to sunrise the heater effectively eliminates the formation of dew on the pyrheliometer window/lens, thus resulting in improved post sunrise early morning measurement accuracy. Determining direct solar irradiance with the DR01 requires connection to a data acquisition device with a measurement resolution of ten micro-volts or better, and an autonomous two-axis solar tracker platform. Typical DR01 measurement applications include scientific meteorological/climate observations, material testing research, solar collector/PV panel efficiency and solar renewable resource assessment. The signal cable of the DR01 can be easily replaced by the user onsite, thus minimizing down-time and expense otherwise associated with instrument re-cabling and/or cable connector replacement by the manufacturer. Each DR01 is calibrated upon manufacture and delivered standard with a WRR (World Radiometric Reference) traceable certificate of calibration. SUGGESTED USE • climatology / meteorology • material testing research • solar collector and PV panel efficiency validation • solar renewable resource assessment Version 0814 (page 1 of 2) Hukseflux reserve the right to alter specifications without prior notice HUKSEFLUX™ THERMAL SENSORS . WWW.HUKSEFLUX.COM . [email protected]

MORE INFORMATION / OPTIONS Optional: extended cable, AC100 / AC420 amplifiers. Various tracking solutions can be offered by Hukseflux DR01 SPECIFICATIONS ISO classification: First Class Spectral range: 200 to 4000 nm Response time (95%): 18 s Full opening view angle: 5 degrees Slope angle: 1 degree Irradiance range : 0 to 2000 W/m2 Sensitivity (nominal): 10 μV/ W/m2 Temperature range: -40 to +80° C Temperature dependence: < 0.1%/°C Non stability (drift): < 1% per year Calibration traceability: WRR Cable length: 5 standard (longer lengths optional) Version 0814 (page 2 of 2) Hukseflux reserve...