The working principle was based on soil dielectric property through +ve electrode at the top and -ve electrode at bottom tip of the sensor tube. Type-I sensor had one probe, Type-II had two probes and Type-III had two insulated probes of galvanized steel. The electric current (mA) ...
The capacitance-based soil moisture sensor (5TM, Decagon Devices, Inc.) is used to measure the dielectric constant of soil. The specific working principles of the 5TM sensor can be found in the literature27. The soil moisture calibration experiment was designed to improve the measurement accuracy...
Dias PC, Roque W, Ferreira EC, Dias JAS (2011) Proposal of a Novel Heat Dissipation Soil Moisture Sensor. In Proceedings of the 5th WSEAS international conference on Circuits, systems and signals (CSS’11). World Scientific and Engineering Academy and Society (WSEAS). (pp. 124–127). Steve...
The sensor interrogation principle was based on the use of the Optical Time-Domain Reflectometer (OTDR) technique and was carried out in cooperation with the Federal Institute for Materials Research and Testing (BAM), Germany. One of advantages of POF fibres over glass fibres for this application...
Conductivity temperature compensation Built-in temperature compensation sensor, compensation range 0-50 ºC Temperature measurement range Range: -40 ~ 80 ° C, resolution: 0.1 ° C, accuracy: ± 0.5 ° C Measurement principle and measurement method FD...
Soil moisture meter, also known as non-contact soil moisture meter, is a TDR frequency domain based on the principle of reflection sensor.It can be carried out for different soil layer of soil moisture content of dynamic observation, but also for rapid, accurate and comprehensive observation, so...
This capacitive soil moisture sensor differs from most of the resistive sensors on the market, using capacitive sensing principle to detect soil moisture. It avoids the problem that the resistance sensor is easy to corrode and greatly prolongs its working life. ...
How to use soil moisture meter? In the place to be measured, insert the sensor alloy probe into the soil vertically, and press the button to start the measurement. as the picture shows: After pressing the button, it is turned on for 1 second and then tested for two seconds. The multi...
Some highly-matured automatic components and parts and control software programmed by Visual Basic language and mature automatic devices such as digital displacement sensor and electro-magnetic valve are used to reform the soil consolidometer without changing its working principle. 我们采用数字位移传感器...
Veinasa-TS Soil humidity sensor (transducer) is a soil moisture measuring instrument of high precision and high sensitivity. The sensor adopts the principle of electromagnetic pulse to measure the apparent dielectric constant of the soil, resulting i...