The Soil Moisture Tool for Precision Horticulture


Are you growing in artificial media? The Delta T Devices WET Sensor is exceptional in its ability to measure pore water conductivity, the EC of the water that is available to the plant in both soils and growing substrates.

EC is not the only trick that the WET Sensor has up its sleeve. Indeed, the name of the device is an acronym that gives a clue as to its functionality – Water content, Electrical conductivity and Temperature.

Where plants are grown in artificial substrates using hydroponic or fertigation systems, nutrient levels are controlled by monitoring the water content and conductivity (EC) and adjusting the injection of liquid fertiliser into the irrigation water. The WET Sensor excels in monitoring this crucial information.

For container-grown shrubs and trees, nutrients are sometimes provided by fertigation but are often provided by controlled release fertilisers.  The rate at which these are taken up depends on several factors, including the weather conditions and irrigation regime. The WET Sensor can be used to measure the EC within the growing media and so take much of the guesswork out of this process.

Dissolved salts can also build up over time and will eventually reduce crop yields. The WET Sensor gives farmers the information they need to take remedial action as quickly as possible.

WET Sensors are normally ordered as a complete kit – the WETKit -  that includes a WET Sensor, an HH2 Moisture Meter and a handy carry case. For portable applications, readout and data storage are handled by the HH2 Moisture Meter.

Alternatively, the WET Sensor can be connected to the GP1 Data Logger or GP2 Data Logger and Controller, making it possible to monitor growing conditions over a period of hours, days or longer.

The WET Sensor is supplied as standard with calibrations for general mineral, organic, sand and clay soils.

Special substrate calibrations for coir, peat-based potting mixes, mineral soils and mineral wool substrates can be ordered as a set at the time of purchase.

For more information and detailed specifications for the WET Sensor you can visit Delta T’s WET Sensor page, or contact MEA.

WET2 Sensor


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