TEROS 31 Laboratory Soil Water Potential Sensor in the United States

TEROS 31 Laboratory Soil Water Potential Sensor in the United StatesSmall in size and quick to react, especially suitable for use in laboratories. The ceramic head at the top of the sensor is only 0.5cm2, which can densely measure the water potential distribution of undisturbed soil and also measure smaller volume soil samples with minimal disturbance to the soil.

Product Introduction

The TEROS 31 tensiometer is compact in size and responds quickly, making it particularly suitable for use in laboratories. The ceramic head at the top of the sensor is only 0.5cm2, which can densely measure the water potential distribution of undisturbed soil and also measure smaller volume soil samples with minimal disturbance to the soil.TEROS 31 Laboratory Soil Water Potential Sensor in the United StatesInstallation is simple, just drill a 5mm installation hole and insert the tension meter. For over twenty years, METER Germany (formerly UMS) has sold tens of thousands of tension meter sensors. TEROS 31 is an upgraded version of the T5 sensor with years of research and development experience, inheriting the accurate, sensitive, and compact characteristics of the T5 tension meter. It is also convenient to access ZL6 series data acquisition and manage data through the ZENTRA Cloud platform.

Measuring principle

The soil water potential can be transmitted to the inside of the sensor through a ceramic cup, causing changes in water pressure inside the sensor. The pressure sensor located inside the sensor outputs a simulated signal to obtain the corresponding water potential.

Main Features

√Suitable for laboratory samples, including soil columns, soil cores, and ring cutter soil samples; Transparent shaft for easy observation

√Response time of 5 seconds, small amount of water required for measurement, quick response to subtle changes in soil water potential

√The ceramic head at the top of the sensor is 0.5 cm2, and only a 5mm diameter installation hole needs to be drilled

√Measure the range of water potential from 50 to -85 kPa. Standardized operation can delay boiling and expand the range of water potential to -150 kPa

√3.5mm headphone jack, plug and play, convenient for accessing ZL6 series data acquisition, data management through ZENTRA Cloud

Technical specifications

- Soil water potential measurement range: -85~+50 kPa (expandable to -150 kPa, depending on boiling delay)

- Soil water potential resolution: ± 0.0012 kPa

- Accuracy of soil water potential: ± 0.15 kPa

- Temperature measurement range: -30~60 ℃

- Temperature resolution: ± 0.01 ℃

- Temperature accuracy: ± 0.5 ℃

- Output: DDI serial port; SDI-12 communication protocol; TensioLINK communication protocol; Modbus RTU Communication Protocol

- Compatible data acquisition (available separately): METER ZL6 series, EM60 series, other data acquisition (capable of collecting 3.6-28.0 VDC excitation voltage and supporting SDI-12, ModbusTM RTU, or TensorLink communication)

- Size: 2.35 × 1.75 × 4.90 cm

- Tension meter rod diameter: 5 mm

- Tension meter rod length: 2, 5, 7, 10, 15, or 20 cm

- Working temperature range: 0~50 ℃

- Material: Ceramic head: Al2O3, bubble point 500 kPa; Body: PMMA; Sensor unit: PMMA and TPE

-Cable length: 1.5 meters

- Cable diameter: 4.20 ± 0.10 mm

- Connection type: 3.5mm 4-channel stereo plug

- Stereo connector diameter: 3.50 mm

- Wire specifications: 22 AWG/24 AWG drain wire

- Supply voltage (VCC to GND): 3.6~28.0 V, typical: 12.0 V

- Digital input voltage (logic high): 1.6~5.0 V, typical: 3.3 V

- Digital input voltage (logic low): -0.3~0.9 V, typical: 0.0 V

- Digital output voltage (logic high): Typical: 3.6 V

- Power line conversion rate: minimum 1.0 V/ms

- Current consumption (during measurement): 18.0-30.0 mA; typical 25.0 mA

- Current consumption (static waiting period): 0.03~0.90 mA; typical 0.05 mA

- Start time: 125~150 ms; typical 130 mm

- Measurement time: 60-70 ms; typical: 65 ms

- Following the standard: produced under the ISO 9001:2015 standard; EM ISO/IEC 17050:2010 (CE marking)