CMP21

Pyranometer
CMP21

CMP21

Retired

Pyranometer

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Model:
CMP21
Item Number:
27062
Warranty:
2 years
Lead time:
14 days

Overview

Kipp & Zonen Pyranometer, ISO Secondary Standard (-40 to +80C)

The CMP21, manufactured by Kipp & Zonen, is an ISO Class A (secondary-standard) pyranometer with an internal thermistor. It monitors solar radiation for the full solar spectrum range, and is well-suited for scientific use and in top-level solar-radiation monitoring networks. This pyranometer connects directly to a Campbell Scientific data logger.

Key Advantages

ISO Secondary Class A
Internal thermistor for optimized measurements

Technical Description

The CMP21 measures solar radiation with a high-quality blackened thermopile protected by two glass domes. An internal thermistor allows individually optimized temperature compensation of the measurements.

The CMP21 has flat spectral sensitivity, from 285 to 2800 nm, that makes it ideal for applications in natural sunlight, under plant canopies, in green houses or buildings, and inverted to measure reflected solar radiation.

A desiccant-filled drying cartridge prevents dew from forming on the inner sides of the CMP21's domes. Campbell Scientific also offers the CVF4 heater/ventilator that keeps its domes free from ice and dew.

The CMP21 includes a white snap-on sun shield that reduces the sensor's temperature. A bubble level and adjusting leveling screws enable the sensor to be leveled without using a leveling base.

 

Benefits

  • Includes thermistor for individually optimized temperature compensation
  • Compatible with most Campbell Scientific data loggers
  • Integrated bubble level is visible without removing sun shield
  • Desiccant-filled drying cartridge prevents dew from forming on the inner sides of the domes
  • Compatible with the CVF4 heater/ventilator that keeps the domes free from ice and dew
  • Measures reflected solar radiation when inverted
  • Provides measurements in direct sunlight, under plant canopies, when the sky is cloudy, and in artificial light

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 A (secondary standard)
Spectral Range
285 to 2800 nm
Sensitivity
7 to 14 µV/W/m2
Temperature Dependence of Sensitivity
< 1%

(-20° to +50°C)

Response Time
< 5 s

(95% of final value)

Zero Offset Due to Thermal Radiation
< 7 W/m2

(200 W/m2)

Non-Stability
< 0.5%

(change/year)

Non-Linearity
< 0.2%

(0 to 1000 W/m2)

Directional Error
< 10 W/m2

(up to 80° with 1000 W/m2 beam)

Tilt Error
< 0.2%
Level Accuracy
0.1°
Impedance
10 to 100 Ω
Operating Temperature Range
-40° to +80°C
Typical Signal Output
0 to 15 mV

(for atmospheric applications)

Maximum Irradiance
4000 W/m2
Expected Daily Uncertainty
< 2%
Dome Diameter
5 cm

(2 in.)

Width
15 cm

(5.9 in.) with shield

Height
9.25 cm

(3.64 in.)

Weight
0.9 kg

(2 lb) with 10.1 m (33 ft) cable

Related Resources

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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.