| Services Available | |
|---|---|
| Free Support | Yes |
Overview
The KH20 is a highly sensitive hygrometer designed for measurement of rapid fluctuations in atmospheric water vapor, not absolute concentrations. It is typically used together with a CSAT3B in eddy-covariance systems.
Read MoreBenefits and Features
- Compatible with most Campbell Scientific data loggers
- High frequency response suitable for eddy-covariance applications
- Well-suited for long-term, unattended applications
Images
Detailed Description
The KH20 is typically used with a CSAT3B Sonic Anemometer in eddy-covariance systems for measuring water vapor flux. This highly sensitive hygrometer measures rapid fluctuations in atmospheric water vapor. It does not measure absolute concentrations. The KH20 is compatible with most of our data loggers.
Routine maintenance is required to keep source windows free of scale. You can use the water vapor absorption coefficient for scaled window from the data report if the window will be allowed to scale during measurements.
Specifications
| Range | 1.7 to 19.5 g/m3 (nominal) |
| Type | Ultraviolet krypton hygrometer |
| Input Voltage Range | 10 V to 16 Vdc |
| Current Consumption | 20 mA max (at 12 Vdc) |
| Power Consumption | 0.24 W |
| Output Signal Range | 0 to 5 Vdc |
| Cable Length | 7.62 m (25 ft) |
| Mounting Pipe Length | 50 cm (20 in.) |
| Dimensions |
|
| Weight | 6.8 kg (15 lb) |
Compatibility
Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.
Dataloggers
| Product | Compatible | Note |
|---|---|---|
| 21X (retired) | ||
| CR10 (retired) | The CR10 requires a VDIV2:1 voltage divider. | |
| CR1000 (retired) | ||
| CR10X (retired) | The CR10X requires a VDIV2:1 voltage divider. | |
| CR200X (retired) | ||
| CR206X (retired) | ||
| CR211X (retired) | ||
| CR216X (retired) | ||
| CR23X (retired) | ||
| CR295X (retired) | ||
| CR3000 (retired) | ||
| CR500 (retired) | ||
| CR5000 (retired) | ||
| CR510 (retired) | ||
| CR800 (retired) | ||
| CR850 (retired) | ||
| CR9000 (retired) | ||
| CR9000X (retired) |
Additional Compatibility Information
Data Logger Considerations
The KH20 requires one single-ended analog input (signal is 0 to 5 Vdc), 12 V power, and ground.
Documents
Manuals
Casos de estudio
Understanding the exchanges of energy, water, and carbon dioxide between the atmosphere, land, and plants......read more
With instrumentation and help from Campbell Scientific, personnel from the Department of Atmospheric Sciences at......read more