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SGR4 Smart Pyrgeometer
  • SGR4 Smart Pyrgeometer

SGR4 Smart Pyrgeometer

Quick Overview

The SGR4 is a Smart Pyrgeometer, designed to provide meteorological measurements of downward atmospheric long wave radiation. The construction of SGR4 pyrgeometers is identical to the CGR4 pyrgeometers but it includes a Modbus interface and amplified analogue output. The SGR4 uses a thermopile detector 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 SGR4 reduces the dome heating offset to a negligible level (particularly when ventilated), eliminating the need for dome temperature measurements or dome shading. The SGR4's Modbus interface provide additional and amplified analogue outputs (4-20mA or 0-1V). The amplified and Modbus interface allows units to be easily swapped out without the need for any adjustments to associated monitoring equipment. A pair of SGR4's can be mounted back to back to form an albedometer to monitoring incoming and outgoing infrared radiation. A screw-in mounting rod and bracket are available for easy installation to a mast or wall. The small size and sealed construction make this instrument the ideal choice for meteorological and agriculture, especially were equipment needs regular calibration.
View Options

Details

The SGR 4 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 SGR 4 can be fitted with the CVF4 ventilation unit to further improve its performance.

To improve the measurement accuracy of the SGR 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.

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 SGR pyrgeometers differ from the CGR pyrgeometers by including a Modbus interface and amplified analogue output. This allows units to be easily exchanged, without the need for any changes to the associated monitoring equipment. The amplified 0-1V or 4-20mA outputs and Modbus address can be matched to existing units and this allows for units to be removed, sent for a re-calibration and then returned to the site until the next calibration date.

Advantages of SGR 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.
  • Configurable analogue output and RS485 Modbus allows units to be swapped out for calibrations without the need to change other equipment.
  • Can be used with the CVF4 Ventilation unit to help maintain sensor body temperature and remove rain, dew, frost and snow.

Diagram

SGR4 Prygeometer Diagram

Specification

  SGR4-V SGR4-A
Spectral Range: 4400 to 50,000nm
Analogue Output: 0-1V 4-20mA
Default Output Range: 0 to 1,000 W/m²
Modbus Interface: RS485 Modbus RTU
Response time:   <18 seconds
Window heating offset (with 1000W/m² solar radiation):   <4W/m²
Temperature dependence of sensitivity (-10ºC to +40ºC):   <1%
Power Supply: 5-30vDC
Power Consumption:


5vDC
12vDC
24vDC
50mW
55mW
60mW
77mW
83mW
100mW
Operating temperature range:  -40 to +80°C
Field of view:   180°


The SGR 4 does not require shading from direct short-wave solar radiation because the dome-heating effect, when suitably ventilated, is negligible due to the unique construction of the pyrgeometer.

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
 
SGR 4 Smart Pyrgeometer with 0-1V Output
0376900-100
SGR4-V Smart 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 4400-50,000nm, response time less than 18 sec (95%), temperature dependence of sensitivity less than 1% (-20 to +50°C). Operating temperature -40 to +80°C. 2-wire RS485 Modbus and 0-1V output. Analogue output range 0 to 1000Wm², Digital output range 0 to 1000Wm². Power Supply 5 to 30vDC @ 55mW. Supplied with no plug or cable.
£4,615.00
or call us for a quote
0376900-102
SGR4-V Smart 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 4400-50,000nm, response time less than 18 sec (95%), temperature dependence of sensitivity less than 1% (-20 to +50°C). Operating temperature -40 to +80°C. 2-wire RS485 Modbus and 0-1V output. Analogue output range 0 to 1000Wm², Digital output range 0 to 1000Wm². Power Supply 5 to 30vDC @ 55mW. Supplied with waterproof 8-pin plug connector with 10m of pre-wired yellow signal cable.
£4,708.00
or call us for a quote
 
SGR 4 Smart Pyrgeometer with 4-20mA Output
0376900-200
SGR4-A Smart 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 4400-50,000nm, response time less than 18 sec (95%), temperature dependence of sensitivity less than 1% (-20 to +50°C). Operating temperature -40 to +80°C. 2-wire RS485 Modbus and 4-20mA output. Analogue output range 0 to 1000Wm², Digital output range 0 to 1000Wm². Power Supply 5 to 30vDC @ 55mW. Supplied with no plug or cable.
£4,615.00
or call us for a quote
0376900-202
SGR4-A Smart 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 4400-50,000nm, response time less than 18 sec (95%), temperature dependence of sensitivity less than 1% (-20 to +50°C). Operating temperature -40 to +80°C. 2-wire RS485 Modbus and 4-20mA output. Analogue output range 0 to 1000Wm², Digital output range 0 to 1000Wm². Power Supply 5 to 30vDC @ 55mW. Supplied with waterproof 8-pin plug connector with 10m of pre-wired yellow signal cable.
£4,708.00
or call us for a quote
 
Connection Options for SMP, SGR, SUV, 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, SGR Pyrgeometers, SUV Radiometers, CMP Pyranometers with PT100 output, CGR3 and CGR4 with PT100 output, CHP1, CNR4, UVS Radiometers and CSD3 Sunshine Duration Sensors.
£40.00
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, SGR and SUV5 Smart Radiometers, plus CMP21 (PT100), CMP22 (PT100), CGR3 (PT100), CGR4 (PT100), CHP1, CNR4, UVS, CSD3
£134.00
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. Suitable for: For SMP, SGR and SUV5 Smart Radiometers, plus CMP21 (PT100), CMP22 (PT100), CGR3 (PT100), CGR4 (PT100), CHP1, CNR4, UVS, CSD3
£260.00
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. Suitable for: For SMP, SGR and SUV5 Smart Radiometers, plus CMP21 (PT100), CMP22 (PT100), CGR3 (PT100), CGR4 (PT100), CHP1, CNR4, UVS, CSD3
£467.00
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. Suitable for: For SMP, SGR and SUV5 Smart Radiometers, plus CMP21 (PT100), CMP22 (PT100), CGR3 (PT100), CGR4 (PT100), CHP1, CNR4, UVS, CSD3
£900.00
or call us for a quote