Model PCT-55/PST-55 -In Situ Soil Psychrometers
The proven transducer in soil research programs, Wescor`s in situ soil psychrometers, model PST-55 are buried within the bulk soil to determine the soil water potential. The PST-55 has a stainless steel screen to allow only the water vapor to enter the sensor. A ceramic screen is also available as model PCT-55. To maintain temperature equilibrium, the sensors must be buried at least 15 cm under the soil surface. The soil psychrometer must be connected to a Wescor water potential instrument such as the PSYPRO, HR-33T, or CR7 for operation.
- Protected with Corro-Guard™ The Corro-Guard process protects the psychrometric thermocouple from corrosion even in hostile soil environments.
- Controlled junction size and chamber geometry for consistent performance
- Gold plated internal connections to resist corrosion
- High sensitivity
- Tested individually for cooling coefficient(Pv), leaks, cleanliness, and sensitivity
- Individual psychrometric calibration curve provided with each unit
- SUREFAST™ connector option available
- When used with the PS-10, requires the SUREFAST connector. The HR-33T and Wescor / Campbell systems can be used with or without the SUREFAST connector
- Psychrometer Output: Typically 4.7 microvolts/MPa at 25° C.
- Hygrometer Output: Typically 7.5 microvolts/MPa at 25° C.
Specify type PCT-55 (ceramic shield) or type PST-55 (ultrafine dutch weave stainless steel screen) and 1.5 or 3 meter lead length by dash number
- Example: PCT-55-15 (1.5 meters)*
- STANDARD LENGTHS PCT-55-30 (3.0 meters)*
* Specify non-standard lengths in decimeters. Example: PST-55-100 (10 meters)
Specify SUREFAST connector option by adding SF. Example: PCT-55-15-SF