Category
Soil moisture sensor – Watermark probe
In addition to being used at agrometeorological stations, sensors from the American manufacturer Irrometer can be installed in the soil at various locations to measure soil water potential, expressed in centibars (kilopascals).
Sensor diameter: 22 mm
Sensor length: 83 mm
Sensor weight: 75 g
Cable length: 150 cm
These sensors are very simple and effective for measuring soil moisture over large areas. The affordable price of the sensors allows you to measure soil moisture at two or more depths on each irrigated field.
The sensors can be connected to a digital Watermark metar for reading soil water potential values. They are capable of measuring soil water potential in the range of 0-199 centibars (0-199 kPa). The sensor consists of an electrode embedded in a granular matrix (made of gypsum), surrounded by a hydrophilic material that ensures good water exchange with the surrounding soil.
The sensor’s durability is provided by a perforated stainless steel casing, which is secured at the ends with a plastic material.
The sensor does not require calibration based on soil type.
When to irrigate?
0 – 10 cb: Soil is well saturated with water.
10 – 30 cb: Soil contains an adequate amount of water for normal plant growth and development (except in sandy soils, where a water deficit may start to appear around 30 cb).
30 – 60 cb: Typical values indicating the need for irrigation (except in heavy soils).
60 – 100 cb: Typical values indicating the need for irrigation in heavy soils.
100 – 200 cb: Soil becomes too dry for maximum yields.
For a video on how to install the 200SS sensor, visit Youtube
For a quote, send an inquiry to [email protected] Or call provided number 097 649 9425
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