SR11

First Class Pyranometer
According to Matt Perry, we have permission from Hukseflux to use their images of the SR11.

SR11

RetiredConfigurable

First Class Pyranometer

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Model:
SR11
Item Number:
33111
Warranty:
4 years
Lead time:
14 days

Overview

SR11 Hukseflux First Class Pyranometer

The SR11, manufactured by Hukseflux Thermal Sensors and cabled by Campbell Scientific, is an ISO-first-class pyranometer that monitors solar radiation for the full solar spectrum range. It produces a millivolt signal that is measured directly by a Campbell Scientific data logger. The SR11 can provide solar radiation measurements for a variety of meteorological applications.

Key Advantages

High-Quality Solar Radiation Sensor
Double glass dome

Technical Description

The SR11 measures solar radiation with a high-quality blackened thermopile protected by two glass domes. The blackened thermopile provides a flat spectral response for the full solar spectrum range, which allows the SR11 to be used under plant canopies or lamps, when the sky is cloudy, and for reflected radiation measurements.

The SR11 includes a bubble level, three adjusting screws, and a cable gland. The bubble level and adjusting screws allow the sensor to be leveled without using a leveling base. The gland facilitates cable replacement. Two SR11 pyranometers can be mounted back-to-back to make a low-cost albedometer.

Because the SR11 is a first-class pyranometer, it is acceptable for providing the solar radiation data used in stability estimations (EPA Meteorological Monitoring Guidance for Regulatory Modeling Applications, pages 2-10).

Mounting

The SR11 should be mounted away from all obstructions and reflective surfaces that might adversely affect the measurement. It typically mounts to a mast, crossarm, or pole (2.54 to 5.33 cm [1.0 to 2.1 in.] OD) via the CM255 or CM255LS mounting stand. The CM265 mounting kit is also available if mounting the pyranometer near the end cap of the NexTracker Torque Tube.

Benefits

  • Compatible with most Campbell Scientific data loggers
  • Measures reflected solar radiation when inverted
  • Provides measurements in direct sunlight, under plant canopies, when the sky is cloudy, and in artificial light
  • Desiccant-filled drying cartridge prevents dew from forming on the inner sides of the domes
  • Includes bubble level and leveling screws, eliminating the need for a separate leveling base and simplifying installation
  • Acceptable for providing the solar radiation data used in stability estimations
  • Double glass dome

Specifications

Sensor
High-quality blackened thermopile protected by two glass domes
Measurement Description
Monitors solar radiation for the full solar spectrum range
ISO Classification
Class B (first class)
Spectral Range
285 to 3000 nm
Sensitivity
15 μV/W/m2

(nominal)

Temperature Response
< ±2%

(-10° to +40°C)

Response Time
18 s

(for 95% response)

Zero Offset
5 W m-2 unventilated

(response to 200 W m-2 net thermal radiation)

Non-Stability
< ±1% change per year
Directional Error
±20 W m-2

(response for beam radiation)

Tilt Error
< ±2%

(0 to 90° at 1000 W m-2)

Level Accuracy
< 1 %
Impedance
40 to 60 Ω
Operating Temperature Range
-40° to +80°C
Dome Diameter
5 cm

(2.0 in.)

Dome Thickness
2 and 4 mm

(0.08 and 0.16 in.)

Width
13.6 cm

(5.4 in.)

Height
9 cm

(3.5 in.)

Weight
0.75 kg

(1.65 lb) with 4.57 m (15 ft) cable

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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.