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CMP21 Spectrally Flat Class A Pyranometer with 10m Cable
  • CMP21 Spectrally Flat Class A Pyranometer with 10m Cable


Quick Overview

CMP 21 Spectrally Flat Class A Pyranometer. Two, 2mm thick, high quality concentric domes. Integrated levelling. Sun shield. Spectral range 285-2800nm, response time less than 5 sec (95%), Operating temperature -40 to +80°C. Thermopile detector: Sensitivity 7 to 14µV/Wm². Temperature Output: 10K Thermistor Output. Supplied with waterproof 4-pin plug connector with 10m of pre-wired yellow signal cable.


The CMP21 uses the same sensing element as the CMP10 but has individually optimized temperature compensation with a 10K thermistor (PT100 Option) sensor is fitted to monitor the housing temperature. The two high quality concentric domes, 2 mm thick, reduce directional error and improve thermal isolation; The radiometric leveling is more accurate with the integral bubble level raised to the top of the housing and viewable without removing the sun shield. Also the CMP21 has a screw-in drying cartridge that allows the desiccant to be replaced. The sensing element is coated with a highly stable carbon based non organic coating, which delivers excellent spectral absorption and long term stability characteristics.

The CMP21 Pyranometer is a spectrally flat class A pyranometer that is fully compliant with ISO 9060:2018 Spectrally Flat Class A specification. The CMP21 is the ideal choice for scientific use and in top level solar radiation monitoring networks such as the Baseline Surface Radiation Networks (BSRN) and Globabl Atmospheric Watch (GAW) of the World Meteorological Organisation (WMO). Units are supplied with a comprehensive, traceable calibration certificate, including its own temperature and directional (cosine) response Data and a 5 year warranty from Kipp & Zonen.

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 connector is a water proof socket fitted with the signature yellow signal cable and has gold-plated contacts allows for easy exchange and re-calibration. The signal cable is available in 10, 25 and 50m lengths.


CMP 21 Diagram


Classification to ISO 9060:2018: Spectrally Flat Class A
Sensitivity: 7 to 14µV/W/m²
Expected Output (0-1500W/m²): 0 to 21mV
Response Time (95%): <5 Seconds
Spectral Range (50% Points): 285 to 2800nm
Zero offsets (unventilated)
(a) thermal radiation (at 200W/m²):
(b) temperature change (5K/h):

< ±7 W/m²
< ±2 W/m²
Non-Stability (Change/Year): <±0.5%
Non-Linearity (100 to 1000W/m²): <±0.2%
Direction Response: <±10W/m²
Temperature Response: <±1% (-10 to +40°C)
Field of View: 180°
Detector Type: Thermopile
Operating Range: -40 to +80°C (0-100%RH)

Availability: Stock Item