Digital Soil Water Potential Meter
Measure soil water potential (up to 100 kPa, ±1 kPa) and temperature (−55–150°C) simultaneously. Probe quantity: 3.
Louise Corscadden, PhD
Director of Science · ConductScience
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Key Specifications
Full details →- Water Potential Measurement Range
- 0 to 100 kPa
- Water Potential Resolution
- 0.01 kPa
- Water Potential Accuracy
- ±1 kPa
- Soil Temperature Range
- −55°C to 150°C
- Soil Temperature Accuracy
- ±0.5°C
- Probe Quantity
- 3
The TRS Series Digital Soil Water Potential Meter is a precision field and laboratory instrument that measures soil water potential—the energy state of water in soil—alongside soil temperature in a single measurement pass. Water potential is the key physical parameter researchers, agronomists, and ecologists use to determine how readily plants can extract water from soil, making it essential for irrigation scheduling, drought-stress studies, and soil-water dynamics research.
The meter delivers a resolution of 0.01 kPa across a measurement range up to 100 kPa, with an accuracy of ±1 kPa for water potential and ±0.5°C for temperature. This dual-parameter capability means you capture both the moisture-stress state of the soil and its thermal condition simultaneously, reducing the number of probe insertions and preserving soil structure across sampling points.
One meter set can be ordered with multiple probes (probe quantity: 3) for readings at several depths or locations within the same experiment. The soil temperature range of −55°C to 150°C accommodates measurements in climates from arctic field conditions through heated greenhouse substrates.
Typical applications include irrigated crop trials, greenhouse and growth-chamber studies, wetland hydrology monitoring, turfgrass and landscape water management research, and any investigation where the availability of soil water to plant roots is a central variable.
Water Potential Measurement Range
- 0 to 100 kPa
Water Potential Resolution
- 0.01 kPa
Water Potential Accuracy
- ±1 kPa
Soil Temperature Range
- −55°C to 150°C
Soil Temperature Accuracy
- ±0.5°C
Probe Quantity
- 3
Data Recording
- Records temperature, water potential and time, with data storage
Peak Capture
- Automatically captures the peak water potential reading
Auto Save
- Timed and full-scale auto save
Auto Power-Off
- Yes
What is the measurement range for soil water potential?
The TRS meter measures soil water potential up to a maximum of 100 kPa, which covers the range most relevant for plant-available water assessments in agricultural and horticultural research.
How precise are the water potential and temperature readings?
Water potential is resolved to 0.01 kPa with an accuracy of ±1 kPa. Soil temperature is measured to an accuracy of ±0.5°C over a range of −55°C to 150°C, making both measurements suitable for detailed soil-water studies.
How many probes does the meter work with?
The probe quantity is three, and one meter set can be ordered with multiple probes. Place probes at different soil depths or in separate plots to compare water potential through a profile or between treatments.
Can this meter be used in freezing or high-temperature environments?
Yes. The soil temperature sensing range of −55°C to 150°C means the probes function in cold-climate field studies as well as in heated greenhouse or growth-chamber substrates, giving you reliable readings across a wide range of experimental conditions.
What types of studies or crops is this instrument suited for?
The TRS meter is well suited for any research where soil water availability to plants is a key variable—including irrigated crop trials, drought-stress experiments, greenhouse horticulture, turfgrass management, wetland hydrology, and soil-profile characterization. Because it measures both water potential and temperature simultaneously, it is particularly valuable in studies where thermal effects on water movement are also of interest.
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