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DR30-D1 Digital Pyrheliometer

Updated:2025-03-13

Brand: Hukseflux
Model：DR30-D1
Description: Welcome to the next level in solar radiation monitoring! DR30 is a high-accuracy digital direct (normal incidence) solar radiation sensor. The scientific name of this instrument is pyrheliometer. DR30
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Product Details

DR30-D1 Digital Pyrheliometer： User's Manual Datasheet

DR30 Next Level Digital First Class Pyrheliometer

The all-digital DR30-D1 pyrheliometer offers the highest accuracy and highest data availability, featuring window heating at low offsets. At the same heating power, the heating has been improved with a factor 4, at 4 times lower offsets! DR30 also offers on-board tilt and humidity sensors. It is applied in high accuracy measurement of the solar radiation received by a plane surface from a 5 ° full field of view angle. This quantity, expressed in W/m², is called “direct” solar radiation or DNI (direct normal irradiance). It is necessary to keep the instrument pointed at the sun by using a two-axis tracker.

Heated for High Data Availability

High data availability is attained by heating of the front window. This suppresses dew and frost deposition.

Low power consumption: DR30 needs only 2 W to keep its window free from dew and frost

Remote Sensor Diagnostics

In addition to solar irradiance, DR30 outputs sensor diagnostics such as:

Tilt angle

Internal humidity

Heater current

Remote diagnostics permits real-time status monitoring, reducing the need for (un)scheduled field inspections.

For communication between a PC and DR30, the Hukseflux Sensor Manager software is included.

It allows the user to plot and export data, and change the DR30 Modbus address and communication settings. Also, the digital outputs may be viewed for sensor diagnostics.

Suggested Use

Solar energy surveys

Solar resource assessments

Meteorological networks

Sites with dew and frost problems

Areas of Application

Solar energy / PV system performance monitoring

DR30-D1 Digital Pyrheliometer Specifications：

Measurand	Direct solar radiationsensor tilt angle
ISO classification	Spectrally flat Class A pyrheliometer
Calibration uncertainty	< 1.2 % (k = 2)
Tilt measurement uncertainty	± 1 ° (0 to 180 °)
Heating	Included
Response time (95 %)	4 s
Full field of view angle	5 °
Slope angle	1 °
– standard operating mode	2 W
– low power operating mode	0.1 W
Zero offset	< ± 1 W/m²
Calibration traceability	to WRR
Spectral range	200 to 4000 x 10⁻⁹ m
Rated operating temperature range	-40 to +80 °C
Temperature response	< ± 0.4 % (-30 to +50 °C)
Temperature response test of individual instrument	Report included
Tilt sensor test of individual instrument	Report included
Rated operating voltage	7 to 30 VDC
Standard cable length	5 m
Digital output	:
Output:	Irradiance in W/m² Instrument body temperature in °C, Tilt angle in ° Internal humidity in %, Heater current in mA
Communication protocol	Modbus / over 2-wire RS-485
Transmission mode	RTU
Options	• Longer cable; 10 and 20 metres • 20 metres extension cable with 2 connectors