SR20-D2

Digital Class A Pyranometer
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SR20-D2

RetiredConfigurable

Digital Class A Pyranometer

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Model:
SR20-D2
Item Number:
34087
Warranty:
5 years
Lead time:
14 days

Overview

SR20-D2 Hukseflux Digital Secondary Standard Pyranometer (-40 to +80C)

The SR20-D2, manufactured by Hukseflux Thermal Sensors, is an ISO 9060:2018 spectrally flat Class A (secondary standard) digital pyranometer that measures solar short-wave radiation in a full hemisphere of the sky. It connects directly to a Campbell Scientific data logger and is designed for Modbus RTU applications that require high measurement accuracy in demanding applications such as scientific meteorological observation networks and utility scale solar-energy-power production sites.

Benefits

  • Low temperature dependence
  • Onboard digital temperature sensor
  • Ultra robust connector, desiccant holder, and sun screen
  • Temperature dependence characterized and supplied for each instrument
  • Directional response tested on each instrument
  • Digital output (Modbus RTU)

Specifications

Sensor
HIgh-quality blackened thermopile protected by two glass domes
Measurement Description
Monitors solar radiation for the full solar spectrum range
ISO Classification
Spectrally flat Class A (secondary standard) pyranometer

(ISO 9060:2018 )

WMO Performance Level
High-quality pyranometer
Response Time
4.5 s
Zero Offset A
5 W/m2 (unventilated), 2.5 W/m2 (ventilated)


(response to 200 W/m2 net thermal radiation)

Zero Offset B
≤ ± 2 W/m2

(response to 5 K/h change in ambient temperature)

Non-Stability
≤ ± 0.5% change per year
Non-Linearity
≤ ± 0.2%

(100 to 1000 W/m2)

Directional Response
< ± 10 W/m2
Spectral Selectivity
< ± 3%

(0.35 to 1.5 x 10-6 m)

Temperature Response
< ± 0.4%

(-30° to +50°C)

Tilt Response
< ± 0.2%

(0 to 90° at 1000 W/m2)

Heater
No heater available
Steady-state Zero Offset
< ± 0.5 W/m2

(at +20°C)

Steady-state Zero Offset
< ± 0.8 W/m2

(-40° to +80°C)

Calibration Uncertainty
< 1.2%

(k=2)

Level Accuracy
< 0.1°

(bubble entirely in ring)

Operating Temperature Range
-40° to +80°C
Field of View (FOV)
180°
Measurement Range
-400 to 4000 W/m2
Spectral Range
285 to 3000 x 10-9 m

(20% transmission points)

Sensitivity
Digital output
Output Definition
Running average over 4 measurements

(refreshed every 0.1 s)

Related Resources

Documents

Connect With Us

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Phone Numbers
General: (435) 227-9000
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Corporate Address
815 W 1800 N
Logan, UT 84321
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Email Address
sales@campbellsci.com

As a trusted leader in measurement systems for more than 50 years, our top priority at Campbell Scientific has always been to provide the most accurate, reliable data for research and industry.