Products-Soil-Moisture

The EnviroPro soil probes will connect to a range of data recorders and the Adcon suite of telemetry devices

The EnviroPro™ by tekor™ is a slimline completely sealed maintenance free probe. This is available in 40, 80, 120 and 160cm lengths, with sensors positioned every 10cm down the length of the probe. Each sensor has three outputs; soil moisture, temperature and salinity.

The probe can be configured to output any combination of moisture, temperature and salinity from any of the sensors down the profile.

The EnviroPro™ by tekor™ has a unique technique that measures absolute soil moisture content, instead of just returning soil moisture levels like most other capacitance probes on the market today.

Also, as the EnviroPro™by tekor™is a fully potted and sealed probe, it can be buried below ground level.

Therefore it is an ideal probe for use in any crop where the probe head must not protrude from the soil surface.

Examples are pasture, turf, playing surfaces, lucerne, and broad acre.

Parameter Range/Specification Accuracy/Qualifier

Method HF Capacitance

Power Supply 6 to 14 VDC

Sensor depths:
EP100C-04: 40cm probe
EP100C-08: 80cm probe
EP100C-12: 120cm probe
EP100C-16: 160cm probe
10 cm resolution

Interface (digital) TLL / RS232 / SDI-12

Direct or multidrop up to 200 metres

Power Consumption Idle 300 uA

During Measurement 60 mA For 1.4 seconds

During Data Transfer 18 mA For 0.4 seconds

Soil Moisture
(Volumetric Soil Moisture Content)

0 to 100% Accuracy +/- 1% in reference
medium at 0 to 35%

Soil Temperature -10 oC to 60 oC +/- 1 oC

Soil Salinity 0 to 6 dS/m +/- 5%

Diameter 34.5mm

Installation Method Oversize hole 37mm, slurry in bentonite/sand(AFS85) mix.

Mix dry mixture first.
930 grams of sand +/- 5%
70 grams of betonite +/- 5%
700 mls of water +/- 5%
Maintenance Nil - Fully sealed probe.

The SMT01 is a sensor for monitoring soil moisture levels and soil temperature values in precision farming and environmental monitoring applications. It provides the data required for cost efficient irrigation, crop yield optimisation and protection of natural resources.

The SMT01 has been designed to work in any type of soil. It has a low current consumption and an SDI-12 interface. It is ideally suited for battery or solar powered remote applications. The SMT01 has short measurement time and fast response to any fluctuation in the soil moisture level. It is easy to install and easy to calibrate . The SMT01 is a rugged, hermetically sealed design, equipped with a polyurethane protected cable.

Features

Whilst designed to be connected to a data recorder, the soil probe can also be read using a small Netbook type computer for instantaneous or spot readings of soil moisture and temperature. The sensor can be supplied with an interface unit ( SP-USB-03 ) which connects directly to the USB port of any computer. Free software is provided to allow reading the soil probe.

The SMT01 soil moisture probe reports soil moisture between 0 - 100 %. The 100 % level represents soil saturation. The example below shows the soil moisture trace where the sensor was located in a crop of Kale vegetables. Irrigation was on an ad-hoc basis. Note the 'stepped' sections of the graph where daily water use can be easily identified. The light, friable soil had limited soil water holding capacity and quickly dried beyond plant extraction levels. The plant thus enter a period of slow growth showing symptoms of water stress.