CMP21 Pyranometer

  • ISO 9060 spectrally flat Class A 
  • Verified cosine response 
  • Verified temperature dependence
  • Low dome IR offset error
  • Excellent linearity
  • Fast response time
  • 5 year warranty

 

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CMP21 Pyranometer

The CMP21 is a high performance research grade pyranometer, and is fully compliant with ISO 9060:2018 spectrally flat Class A specifications.

The CMP21 pyranometer is designed to measure the irradiance (measured in W/m²) on a plane surface, which results from the direct solar radiation and the diffuse radiation incident from the hemisphere above.

The CMP21 has the same detector as the CMP10 and individually optimized temperature compensation. A standard thermistor sensor is fitted to monitor the housing temperature. Each instrument is supplied with its own temperature and directional (cosine response) test data.

It is the choice for scientific use and in top level solar radiation monitoring networks such as the BSRN (Baseline Surface Radiation Network) of the WMO (World Meteorological Organization).

A waterproof socket is integrated for our signature Kipp & Zonen yellow signal cable, which is available in a range of lengths pre-wired to the waterproof plug. The integral bubble level is raised to the top of the housing and can be viewed without removing the redesigned snap-on sun shield, which also covers the connector. The screw-in drying cartridge is easy to remove and the replacement desiccant is supplied in convenient refill packets.

The CMP21 pyranometer does not require a dedicated power supply. It generates a low voltage output in the estimated range of 0 to 21 mV relative to an irradiance measurement range of 0 to 1500 W/m². When a higher voltage level or a 4 to 20 mA signal is required, the AMPBOX is the perfect solution.

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Specifications

Spectral range (50% points) 285 to 2800 nm
Sensitivity 7 to 14 µV/W/m²
Response time (95%) < 5 s
Zero offset A < ±7 W/m²
Zero offset B < ±2 W/m²
Directional response (up to 80° with 1000 W/m² beam) < ±10 W/m²
Temperature response (-20 to +50°C) < ±1 %
Operational temperature range -40 °C to +80 °C
Maximum solar irradiance 4000 W/m²
Field of view 180 °

FAQ

Accessories

Accessory Description
CMF Mounting Fixtures CMF Mounting Fixtures
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CMF1 and CMF4 mounting fixtures for all series pyranometers Add To Basket
Glare Screen Kit Glare Screen Kit
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Sun protection screen for downward facing radiometers mounted on an albedo/net radiation mounting plate Add To Basket
CM121B/C Shadow Ring CM121B/C Shadow Ring
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To be used with Kipp & Zonen pyranometers, smart pyranometers, pyrgeometers and UV radiometers to shield the instrument from direct radiation. Add To Basket
METEON Data Logger METEON Data Logger
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METEON is a hand-held device for use with Kipp & Zonen passive radiometers to display real-time irradiation values and has an integrated data logging function to store up to 3500 samples. METEON will operate for up to 7 weeks on 2 x AA batteries. Add To Basket
AMPBOX Amplifier AMPBOX Amplifier
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AMPBOX is a current loop amplifier for the complete range of solar radiometers. Add To Basket
Adjustable Tilt Radiometer Mounting Kit Adjustable Tilt Radiometer Mounting Kit
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Mount a radiometer at a desired solar zenith angle between 0° and 90° to measure tilted global or diffuse radiation. Add To Basket
CVF4 Ventilation Unit CVF4 Ventilation Unit
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Ventilating solar radiation instruments improves the reliability and accuracy of measurements and reduces maintenance. CVF4 is a high quality waterproof ventilation unit designed to be used with Kipp & Zonen pyranometers, pyrgeometers, and ultraviolet radiometers. Add To Basket
LOGBOX SE Data Logger LOGBOX SE Data Logger
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LOGBOX SE is a weatherproof field data logger with 4G LTE cellular communication. Designed for use with all Kipp & Zonen solar radiation instruments, both analog and Modbus®, including RT1. It is also compatible with DustIQ and Lufft all-in-one weather stations. LOGBOX SE can operate from internal batteries, external DC power or a solar panel. Add To Basket
Fixed Feet For Tilted CMP/SMP6-22 Mounting Fixed Feet For Tilted CMP/SMP6-22 Mounting
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Kit with two fixed feet for easy installation of POA pyranometers. Add To Basket