Updated:2023-02-23
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Precise mode
Chilled mirror dew point technique
Fast equilibration
Unparalleled accuracy in the -0.1 MPa to -300 MPa range
Durable and easy to clean
Easy to calibrate with saturated salt solutions
Conforms to ASTM D6836
Use with HYPROP to create a full soil moisture release curve
Measurement Specifications | Water Potential | Range: 0 – -300 MPa |
Resolution: NA | ||
Accuracy: ±0.05 MPa from 0 to –5 MPa 1% from –5 to –300 MPa |
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NOTE: All vapor pressure instruments (including the WP4C) are limited by accuracy in the wet end of the water potential range. The range of 0 to −5 MPa has an accuracy of ±0.05 MPa. For example, a measurement of −0.1 MPa has an accuracy of ±50% of the measurement and a measurement of −1 MPa has an accuracy of ±5%. The WP4C will not measure water potential accurately near field capacity (-0.033 MPa). | ||
Temperature | Range: 15.00 – 40.00 °C | |
Resolution: 0.10 °C | ||
Accuracy: ±0.20 °C | ||
Read Time |
Soil Sample: ~10–15 min (precise mode) < 5 min (fast mode) |
|
Plant Sample: ~20 min | ||
NOTE: WP4C will display updated measurements approximately every 5 min until stopped | ||
Physical Specifications | Case Dimensions |
Length: 24.1 cm (9.5 in) Width: 22.9 cm (9.0 in) Height: 8.9 cm (3.5 in) |
Case Material | Powder painted aluminum | |
Universal Power | 110.0000 – 220.0000 V AC 50/60 Hz | |
Sensor Types |
Chilled-mirror dew point sensor Infrared temperature sensor |
|
Cable Type | Standard RS-232 to USB cable (included) | |
Display | 20 x 2 alphanumeric LCD with backlighting | |
Sample Cup Capacity |
15 mL (0.5 oz) full 7 mL (0.25 oz) recommended |
|
Operating Temperature |
Minimum: 5.00 °C Typical: NA Maximum: 40.00 °C |
|
Weight | 3.2 kg (7.1 lb) | |
Data Communications |
RS-232A serial 8-data bit ASCII codel 9,600 baud, no parityl 1 stop bit |
|
Other | Compliance |
Manufactured under ISO 9001:2015 EM ISO/IEC 17050:2010 (CE Mark) Compatible standard: ASTM D6836-07 |
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