Description
The WET Sensor type WET-2 measures three vital soil properties: Water content, Electrical Conductivity (EC) and Temperature.
• Moisture and nutrient status in the root zone
• Rapid monitoring of growing conditions
• Calibrations for many soils and substrates
Rapid checks on growing conditions:
The WET Sensor can easily be inserted into substrates, composts and most soils, enabling growers and researchers to make rapid checks and optimise the uniformity of growing conditions. Each reading takes less than 5 seconds and provides 3 of the most important indicators of root zone health: water content (%), pore water conductivity (ECp) and temperature (°C). The sensor is particularly useful in horticulture for monitoring and responding to variations when applying fertigation, CRF or organic treatments.
Pore water conductivity:
The WET Sensor is able to calculate pore water conductivity (ECp) which is the EC of the water available to plant roots. The ECp calculation is derived from an approximate relationship between dielectric properties. This applies particularly well to WET Sensor readings, which are taken at the same frequency within the same defined region of soil/substrate. The approximation is valid in most soils and is particularly accurate in mineral wool and other artificial substrates media.
Horticultural media calibrations:
The WET Sensor is supplied with default calibrations for generic mineral, organic, sand and clay soils. Special WET-GH substrate calibrations can be ordered as a set, for a variety of horticultural media including coir, peat-based potting mixes and greenhouse “mineral” soils. Alternatively, WET-ST calibrations can be ordered for mineral wool
(vertical and horizontal measurement).
Data logging:
The WET Sensor can be connected to the GP2 or GP1 Data Logger in order to monitor fluctuations in growing conditions over time. The smart control relay capability of the GP2 and GP1 are fully enabled for the WET Sensor, so the system may be configured to control water content and/or EC or temperature using powerful built-in control capabilities.
Applications:
• Horticulture
• Agriculture
• Soil science
| Brief Specification | |
| Measured parameters | |
| Permittivity, ε′ | 1 to 80 ± 2.5 |
| Bulk conductivity | 0 to 300 mS.m-1 ± 10 (ECb) |
| Temperature | -5 to 50°C ± 1.5°C |
| Calculated parameters | |
| Volumetric Soil
Moisture, θ |
0 to 100% ± 3%
|
| Pore water
conductivity |
See graph below (ECp) |
| Other specifications | |
| Calibration | Individual sensor calibrations
stored within sensor EEPROM |
| Output | Serial data (TTL) |
| Environmental | IP68, -40 to +70°C |
| Power | 6 to 10 V, ~38 mA for 2.5 s |
| Dimensions | ~120 x 45 x 13 mm |
| Rods | ~68 mm long |
| Sample volume | ~500 ml |
