Overview
Kipp & Zonen's CGR 3 is a pyrgeometer, designed for meteorological measurements of downward atmospheric long wave radiation.
The "-L" on a product model indicates that the cable length is specified at the time of order.
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Detailed Description
The CGR3 provides a voltage that is proportional to the net radiation in the far infrared (FIR). By calculation, downward atmospheric long wave radiation is derived. For this reason CGR3 embodies a temperature sensor. The CGR3 uses a specially designed silicon window. On the inside a solar-blind filter blocks solar radiation. The CGR3 data represents the radiation exchange within the whole hemisphere. This is because the reference CGR3 is calibrated outdoors with respect to a reference CG 4, which has a 180 degrees field of view.
The CGR3 has been improved in many points over the CG 3, based on customer feedback and years of experience. The CGR3 has a newly designed sunscreen that covers both body and connector to reduce the instrument temperature and further increase the accuracy. The design of the instruments accounts for the use of existing Kipp & Zonen mounting plates.
The base of the instruments contains the mounting holes, a spirit level and levelling feet for exact levelling. For ease of mounting, exchange and recalibration the instruments have a waterproof connector. The standard supplied 10 m. shielded cable has the waterproof sealed counterpart connector. The improved temperature dependency and directional response make these instruments the ideal choice for meteorological and agricultural applications.
Specifications
- Response time (95%): < 18s
- Non-stability (change/year): < 1%
- Non-linearity (-250 to 250 W/m²): < 1%
- Window heating offest (with 1000 W/m² solar radiation): <15 w="" m="" li="">
- Temperature dependence of sensitivity: <5% (-10°C to +40°C)
- Sensitivity: 5 to 15 μV/W/m²
- Operating temperature: -40°C to +80°C
- Field of view: 150°
- Spectral range (50 % points): 4.5 to 42 μm
- Irradiance (net): -250 to 250 W/m²
- Cable length: User specified
- Warranty: 2 years
Compatibility
Mounting
Kipp & Zonen's CGR3 includes a bubble level and adjusting leveling screws, which allow the sensor to be leveled without using a leveling base. The 015 Mounting Arm can be used to mount the sensor to a mast or the CM225 Solar Sensor Mounting Stand can be used to attach the sensor to a mast, crossarm, or pole (1.0-in. to 2.1-in. outer diameter). The CM225 consists of rectangular plate, mounting bracket, U-bolts, lock washers, and nuts.
Alternatively, the CM245 Adjustable Angle Mounting Stand may be used. It includes slots that can be adjusted to any angle from horizontal to vertical.
Datalogger Considerations
Compatible Contemporary Dataloggers
| CR200(X) Series | CR800/CR850 | CR1000 | CR3000 | CR5000 | CR7X | CR9000X |
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Compatible Retired Dataloggers
| CR500 | CR510 | CR10 | CR10X | 21X | CR23X | CR9000 |
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