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Decagon Devices - WP4: Soil/Leaf
Water Potential Measuring System
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WP4’s infrared
thermometer measures the difference in temperature between the
sample and the block. Temperature plays a critical role in water
potential determinations. Most critical is the measurement of the
difference between sample and dew point temperature. If this
temperature difference were in error by 1°C, an error of 8 MPa
would result. In order for water potential measurements to be
accurate to 0.1 MPa, temperature difference measurements need to be
accurate to 0.005 °C. Temperature control is from 15° to
40°C.To study the effects of temperature on the water
potential of a sample,to compare the the water potential of
different samples independent of temperature or other water
potential studies where temperature control is critical.Also to
minimize extreme ambient temperatures fluctuations. WP4 T is useful.
Specifications:
- Operating
Environment:
5 to 43°C (41 to 110° F)
- Temperature Control (WP4-T only):
15° to 40° C ±0.2 °C
- Sensors:
1. Infrared temperature sensor
2. Cooled-mirror dew point sensor
- Universal
Power:
110V to 220V AC, 50/60Hz
- Display:
20 x 2 alphanumeric dot-matrix LCD
with backlighting.
- Range:
0 to -300 Mpa
- Interface
Cable:
Standard RS232 serial cable (included)
- Data
Communications:
RS232 compatible, 8 data bit ASCII code,
9600 baud, no parity, 1 stop bit
- Weight:
3.2 kilograms (5.2 kilos shipping weight)
- Sample dish
capacity:
7ml recommended (15ml full)
- Accuracy:
±0.1 MPa from 0 to -10MPa
±1% from -10 to -60 MPa
- Read time:
~5 minutes
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about WP-4 |
