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Thursday August 21, 2008
GT3-1 Custom Tensiometer
Transducers
Measuring Principle
The soil water tension is transmitted via the ceramic cup into the tensiometer. The vacuum inside the tensiometer is measured by a pressure transducer, which gives a continuous analogue output signal.
Resolution and Accuracy
A resolution of 0.1 kPa (1 cm H2O) can be attained for the GT3 Tensiometer Transducer. The accuracy actually obtained is related to the calibration and resolution of the AD converter.
In field applications the values obtained should consider the shaft/cup length of the tensiometer: 1 cm = 0.1 kPa.
Transducer connection
| Red | +10 V power supply |
| Yellow | Signal output "+" |
| Pressure change from 0 to -7 kPa | |
| Output from 0 to -20 mV | |
| Black | Battery ground |
| Blue | Signal output "-" |
Ordering Information
| GT3-1 | Transducer with 1/4 inch NPT thread, 1 m cable |
| ST1 | Optional interface for use with ICT Smart Logger |
Note: Customers requiring cable lengths greater than 1 m are requested to source cable locally. Standard 4 wire cable is required.
| Links and Brochures | ||
|---|---|---|
Download a printer-friendly version of GT3-1 Brochure (200K PDF)
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GT3-15 0 to -100kPa Jet fill Tensiometer Transducers
Download a printer-friendly version of GT3-15 Brochure (200K PDF)
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GT3-30 -100 to 200kPa Jet fill Tensiometer Transducers
Download a printer-friendly version ofGT3-30 Brochure (200K PDF)
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GT3-420 Jet fill Tensiometer Transducers
Download a printer-friendly version of GT3-420 Brochure (200K PDF)
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| GT3 Custom Tensiometer Transducers | ||
| Notes for Tensiometer & Pressure Transducer Interfaces | ||
| Soil Science Instrumentation | ||
| FieldStation | ||
| Irrigation Solutions | ||
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