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CGR4 Pyrgeometer

CGR4 Pyrgeometer

Quick Overview

The CGR4 is a pyrgeometer, designed for top level solar radiation monitoring networks such as the Baseline Surface Radiation Network (BSRN) of the World Meteorological Organisation for the meteorological measurements of downward atmospheric longwave radiation. The CGR4 uses a thermopile detectors and has a sensitivity of 5 to 15V/W/m in a spectral range of 4.5 to 42m. This pyrgeometer has a specially designed silicon meniscus dome with a hard-carbon coating for a smooth spectral response and provide extra surface protection. An internal thin film coating that absorb a large part of the short-wave radiation. The unique design of the CGR4 reduces the dome heating offset to a negligible level (particularly when ventilated), eliminating the need for dome temperature measurements or dome shading.
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Details

Radiation from the sun is mainly in the ‘short-wave’ range from 300 to 4000nm (4μm) that includes the visible and ultraviolet. A proportion of this radiation is absorbed by clouds, aerosols and molecules in the atmosphere, which warms up and radiates ‘long-wave’ radiation. This is far infrared thermal energy (FIR) at wavelengths from 4.5μm to beyond 40μm. Both the shortwave and long-wave radiation reach the Earth, where some is reflected and the remainder warms up the surface. The Earth radiates long-wave thermal energy back to the sky. The relationship of incoming and outgoing short-wave and long-wave radiation is the ‘Energy Balance’. Short-wave radiation is measured by a pyranometer and the long-wave radiation by a pyrgeometer.

The CGR 4 pyrgeometer has been specifically designed to provide voltage output that is proportional to the radiation exchange between the CGR 4 and the sky (or ground) in its field of view. This pyrgeometer has a specially designed meniscus dome providing a 180º field of view with negligible directional response error. A hard-carbon coating on the outside of the dome smoothes the spectral response and provides extra protection to the silicon surface. The excellent thermal stability of the dome construction and coupling to the instrument body eliminates the need for dome temperature measurements or dome shading. The CGR 4 can be fitted with the CVF4 ventilation unit to further improve its performance.

Advantages of CGR 4 Pyrgeometers

  • Custom designed Silicon Meniscus dome for wider field of view and lower thermal effect.
  • Reduced thermal affect removed the need for shading the sensor
  • Integral bubble level is raised to the top of the housing and can be viewed without removing the snap-on sun shield, which also covers the connector.
  • Screw-in drying cartridge is easy to remove and replenish desiccant.
  • Can be used with the CVF4 Ventilation unit to help maintain sensor body temperature and remove rain, dew, frost and snow.

 

Specification

Spectral range: 4500 to 42,000nm
Sensitivity: 5 to 15µV/W/m²:
Response time: <18 seconds
Window heating offset (with 1000W/m² solar radiation): <4W/m²
Temperature dependence of sensitivity (-20ºC to +50ºC): <1%
Operating temperature range: -40 to +80°C
Net irradiance: -250 to 250W/m²
Field of view: 180°

 

To improve the measurement accuracy of the CGR 4 Pyrgeometers the CVF4 ventilation unit can be used. It can be used outdoors under all weather conditions and includes a built in heater to keep the air just above ambient temperature which helps disperse precipitation and melt frost, or even melt snow and ice in cold climates. The CVF4 has a tacho output that can be used to check the proper operation of the CVF4. The output signal is 5V and nominal output should be at 146Hz. Higher frequency would suggest the filter needs replaced, whilst lower frequency could highlight an issue with the ventilator.

Availability: Stock Item

 

Components / Downloads

For further information, technical advice, or a quotation please call or email us. If you are not sure which product you need one of our technical sales advisors will be happy to discuss your application. We also accept company purchase orders by fax or post. Credit card orders can also be placed over the phone for any product.

REF DESCRIPTION DOWNLOADS PRICE ORDER ITEM
 
CGR 4 Pyrgeometer with 10K Thermistor
0359900-010
0359900-010
CGR 4 Pyrgeometer with integrated 10K Thermistor temperature sensor. Silicon meniscus dome with hard carbon coating and infrared window materials to absorb short-wave radiation. Integrated leveling. Sun shield. Spectral range 4500-42,000nm, response time less than 18 sec (95%), temperature dependence of sensitivity less than 1% (-20 to +50°C). Operating temperature -40 to +80°C. Sensitivity 5 to 15µV/Wm². Supplied with no plug or cable.
View FileDatasheet
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£4,337.00
or call us for a quote
0359900-012
0359900-012
CGR 4 Pyrgeometer with integrated 10K Thermistor temperature sensor. Silicon meniscus dome with hard carbon coating and infrared window materials to absorb short-wave radiation. Integrated leveling. Sun shield. Spectral range 4500-42,000nm, response time less than 18 sec (95%), temperature dependence of sensitivity less than 1% (-20 to +50°C). Operating temperature -40 to +80°C. Sensitivity 5 to 15µV/Wm². Supplied with waterproof 4-pin plug connector with 10m of pre-wired yellow signal cable.
£4,421.00
or call us for a quote
 
CGR 4 Pyrgeometer with PT100
0359900-020
0359900-020
CGR 4 Pyrgeometer with integrated PT100 temperature sensor. Silicon meniscus dome with hard carbon coating and infrared window materials to absorb short-wave radiation. Integrated leveling. Sun shield. Spectral range 4500-42,000nm, response time less than 18 sec (95%), temperature dependence of sensitivity less than 1% (-20 to +50°C). Operating temperature -40 to +80°C. Sensitivity 5 to 15µV/Wm². Supplied with no plug or cable.
£4,458.00
or call us for a quote
0359900-022
0359900-022
CGR 4 Pyrgeometer with integrated PT100 temperature sensor. Silicon meniscus dome with hard carbon coating and infrared window materials to absorb short-wave radiation. Integrated leveling. Sun shield. Spectral range 4500-42,000nm, response time less than 18 sec (95%), temperature dependence of sensitivity less than 1% (-20 to +50°C). Operating temperature -40 to +80°C. Sensitivity 5 to 15µV/Wm². Supplied with waterproof 8-pin plug connector with 10m of pre-wired yellow signal cable.
£4,547.00
or call us for a quote
 
Connection Options for CMP Pyranometers, CGR3 (10K), CGR4 (10K), CVF4 & CNF4 Ventiliation units.
2523145
Waterproof 4-pin plug connector for the following Kipp & Zonen equipment. CMP Series pyranometers, CGR3 & CGR4 pyrgeometers and CVF4 & CNF4 ventilation units. Requires customers own cable wiring.
£20.00
or call us for a quote
0362611
Waterproof 4-pin plug connector with 10m of pre-wired high quality yellow signal cable with 4 wires and a shield covered with black sleeve. Suitable for the following Kipp & Zonen equipment. CMP Series pyranometers, CGR3 & CGR4 pyrgeometers and CVF4 & CNF4 ventilation units.
£84.00
or call us for a quote
0362613
Waterproof 4-pin plug connector with 25m of pre-wired high quality yellow signal cable with 4 wires and a shield covered with black sleeve. Suitable for the following Kipp & Zonen equipment. CMP Series pyranometers, CGR3 & CGR4 pyrgeometers and CVF4 & CNF4 ventilation units.
£179.00
or call us for a quote
0362614
Waterproof 4-pin plug connector with 50m of pre-wired high quality yellow signal cable with 4 wires and a shield covered with black sleeve. Suitable for the following Kipp & Zonen equipment. CMP Series pyranometers, CGR3 & CGR4 pyrgeometers and CVF4 & CNF4 ventilation units.
£336.00
or call us for a quote
0362615
Waterproof 4-pin plug connector with 100m of pre-wired high quality yellow signal cable with 4 wires and a shield covered with black sleeve for CMP Series Pyranometers and Pygeometers with 10K thermistor output.
£651.00
or call us for a quote
 
Connection Options for SMP's, CMP21 (PT100), CMP22 (PT100), CGR3 (PT100), CGR4 (PT100), CHP1, CNR4, UVS, CSD3
2523146
Waterproof 8-pin plug connector for the following Kipp & Zonen equipment. SMP Pyranometers, CMP Pyranometers with PT100 output, CGR3 and CGR4 with PT100 output, CHP1, CNR4, UVS Radiometers and CSD3 Sunshine Duration Sensors.
£25.00
or call us for a quote
0362621
Waterproof 8-pin plug connector with 10m of pre-wired high quality yellow signal cable with 8 wires and a shield covered with black sleeve. Suitable for: For SMP Smart Pyranometers, CMP21 (PT100), CMP22 (PT100), CGR3 (PT100), CGR4 (PT100), CHP1, CNR4, UVS, CSD3
£90.00
or call us for a quote
0362623
Waterproof 8-pin plug connector with 25m of pre-wired high quality yellow signal cable with 8 wires and a shield covered with black sleeve. For SMP Smart Pyranometers, CMP21 (PT100), CMP22 (PT100), CGR3 (PT100), CGR4 (PT100), CHP1, CNR4, UVS, CSD3
£184.00
or call us for a quote
0362624
Waterproof 8-pin plug connector with 50m of pre-wired high quality yellow signal cable with 8 wires and a shield covered with black sleeve. For SMP Smart Pyranometers, CMP21 (PT100), CMP22 (PT100), CGR3 (PT100), CGR4 (PT100), CHP1, CNR4, UVS, CSD3
£342.00
or call us for a quote
0362625
Waterproof 8-pin plug connector with 100m of pre-wired high quality yellow signal cable with 8 wires and a shield covered with black sleeve. For SMP Smart Pyranometers, CMP21 (PT100), CMP22 (PT100), CGR3 (PT100), CGR4 (PT100), CHP1, CNR4, UVS, CSD3
£657.00
or call us for a quote
 
CVF 4 Ventilation Unit
0378900-000
0378900-000
CVF 4 Ventilation unit designed to provide clean air-flow over the dome or window to minimise the formation of dew and reduce the frequency of dome cleaning. Replaceable fan inlet filter. Power Supply 8-13.5vDC (5W continuously at 12vDC, 5.5W with heater) Operating temperature range -40 to +70°C. Waterproof connector, supplied without plug or cable. Suitable for Kipp & Zonen CMP & SMP series pyranometers and CUV5 & UVS radiometers.
£909.00
or call us for a quote
0378900-002
0378900-002
CVF 4 Ventilation unit designed to provide clean air-flow over the dome or window to minimise the formation of dew and reduce the frequency of dome cleaning. Replaceable fan inlet filter. Power Supply 8-13.5vDC (5W continuously at 12vDC, 5.5W with heater) Operating temperature range -40 to +70°C. Supplied with waterproof 4-pin plug connector with 10m of pre-wired yellow signal cable. Suitable for Kipp & Zonen CMP & SMP series pyranometers and CUV5 & UVS radiometers.
£993.00
or call us for a quote
 
Mounting Options
0362700
CMF 1 Mounting fixture has a 88mm diameter round plate with a non-removable mounting rod of 16mm diameter and 350mm long. Can be mounted to a pole or wall with the CMB 1 mounting bracket.
£168.00
or call us for a quote
0362703
0362703
CMF 4 Mounting fixture has a 280mm diameter plate with a non-removable mounting rod of 20mm diameter and 350mm long. Can be mounted to a pole or wall with the CMB 1 mounting bracket. Suitable for ventilated radiometers.
£347.00
or call us for a quote
0369701
0369701
CMB 1 Mounting Bracket. This bracket is suitable for various mounting rod sizes, from 12mm to 20mm diameter, and can be secured via u-bolts to masts or poles from 22mm up to 60mm diameter. The bracket can also be secured directly to a wall, or other flat surface.
£216.00
or call us for a quote