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CHP1 Pyrheliometer
  • CHP1 Pyrheliometer

CHP1 Pyrheliometer

Quick Overview

The CHP1 pyrheliometer is the most commonly use radiometer for the measurement of direct solar radiation. The CHP1 consists of a thermopile detector and two temperature sensors. The CHP1 will produce a maximum output of 25mV under normal atmospheric conditions. The pyrheliometer needs to be pointed at the sun at all times and the Solys2 and 2AP Suntrackers have been designed to incorporate a CHP1. Every CHP1 is supplied with a calibration certificate traceable to the World Radiometric Reference and is valid for 1 year from the date of first use by the customer.
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Details

The CHP 1 Pyrheliometer is an all-weather pyrheliometer available for continuous measurements of direct solar radiation. The CHP 1 exceeds the specifications for high end solar radiation networks, such as the Baseline Surface Radiation Network (BSRN) of the World Climate Research Programme (WCRP). These networks require accurate and reliable long-term measurements for climate change investigations.

A pyrheliometer is an instrument designed specifically to measure the direct beam solar irradiance with a field of view limited to 5°, also known as Direct Normal Irradiance, DNI. This is achieved by the shape of the collimation tube, with precision apertures, and the detector design. The front aperture is fitted with a quartz window to protect the instrument and to act as a filter that passes solar radiation between 200 and 4000nm in wavelength.

The CHP1 consists of a thermopile detector and two temperature sensors mounted at the rear of a collimation tube. The thermopile responds to the total power absorbed by the black surface coating, which is a non-spectrally selective paint, and warms up. The heat generated flows through a thermal resistance to the heat-sink (the pyrheliometer body). The temperature difference across the thermal resistance of the detector is converted into a voltage as a linear function of the absorbed solar irradiance. The CHP1 will produce a maximum output of 25mV under normal atmospheric conditions.

The detector is similar to that used in the highest level pyranometers CMP21 and CMP22, which minimizes the influence of ambient temperature fluctuations and provides a fast response time. Both PT100 and 10K thermistor temperature sensors are fitted as standard, to allow use of the individual temperature response data supplied with each CHP 1. Thanks to the signal cable connector and screw-in desiccant cartridge the design is easy to install and maintain. The specifications exceed ISO and WMO performance criteria for First Class Normal Incidence Pyrheliometers. Every CHP 1 is supplied with a calibration certificate traceable to the World Radiometric Reference and is valid for 1 year from the first use.

Specification

Spectral range: 200 to 4000nm
Sensitivity: 7 to 14µV/Wm²
Response time: <5 seconds (95%)
Analogue Output: 10 to 20mV for 1400 Wm²
Analogue Output Range: 0 to 4000 Wm²
Temperature dependence of sensitivity: <0.5% (-20 to +50°C)
Operating temperature range: -40 to +80°C
Field of view: 5° ±0.2°

The CHP 1 has a maximum output of 25mV under normal atmospheric conditions and it is recommended that a data logger with an analogue input of at least 12 bits resolution over that range is used to record the readings.

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
 
CHP 1 Pyrheliometer, ISO First Class
0368900-030
0368900-030
CHP 1 Pyrheliometer. Quartz window, integrated alignment aids, rain shield. Spectral range 200-4000nm, response time less than 5 sec (95%), Operating temperature -40 to +80°C. Thermopile detector. Sensitivity 7 to 14µV/Wm², (variation < 0.5% from -20 to +50°C). Calibration certificate includes temperature dependency from -20 to +50°C in 8 steps of 10°C. Fitted with both 10K thermistor and PT100 internal temperature sensors. Supplied with no plug or cable.
View FileDatasheet
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£2,735.00
or call us for a quote
0368900-032
0368900-032
CHP 1 Pyrheliometer. Quartz window, integrated alignment aids, rain shield. Spectral range 200-4000nm, response time less than 5 sec (95%), Operating temperature -40 to +80°C. Thermopile detector. Sensitivity 7 to 14µV/Wm², (variation < 0.5% from -20 to +50°C). Calibration certificate includes temperature dependency from -20 to +50°C in 8 steps of 10°C. Fitted with both 10K thermistor and PT100 internal temperature sensors. Supplied with waterproof 8-pin plug connector with 10m of pre-wired yellow signal cable.
£2,835.00
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.
£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 Smart Pyranometers, CMP21 (PT100), CMP22 (PT100), CGR3 (PT100), CGR4 (PT100), CHP1, CNR4, UVS, CSD3
£133.33
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
£273.33
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
£500.00
or call us for a quote