Analog Tensiometer
The main uses:
- Continuous, long term follow-up of soil moisture changes with no need of physically being on site.
- Viewing data anywhere, any time, by various devices, Such as P.C. Smartphones, Tablets etc.
- Optional Automatic irrigation start/stop according to soil water condition.
Ami-Tens' Analog sensors are using standard electronic outputs (4-20mA or 0-2V), which are compatible to most monitoring or control systems available in the market.
Specifications
The device's body – it is the same as all Ami-Tens' tensiometers, whereas beneath the transparent window there is a TEE connector in which the Analog Transducer is screwed.
On top of the device there is a screwed cap for refilling water.
The Analog Vacuum Sensor (Transducer):
Its body is a stainless steel Cylinder ( L=6cm or 10 cm, D=2 cm), with a G1/4' threaded connection.
Electro-Mechanical details
- The Transducer converts Physical values (water tension) to electrical standard outputs.
- There are 4 basic models, differing from each other by the output mode and the measuring range:
For most mineral soils:
- 4-20mA output, range of 0-100cb.
- 0-2V output , for range of 0-100cb.
For soilless media or sand :
- 4-20mA output, for range of 0-20cb.
- 0-2V output, for range of 0-20cb.
Measured changes of Currency or Voltage outputs are proportional to changes of water tension and thus, reflect the changes of soil moisture levels.
Operation Power:
For 4-20mA models: 10-24V for 0-2V models : 3-12V (with Voltage stabilizer)
Temperature compensation: Between 0-70C0
Length of cable between the sensor and the Logger– up to about 200 M.(2 wires)
General remarks:
- The top cap, using for for water refill, must always be hermetically closed.
- In order to prevent algae growth we recommend to add a few drops of liquid home Chlorine solution to the pipe, or, alternatively, cover the transparent part by an Aluminum foil or other materials.
Options with special orders:
- To use with an angular tensiometer for shallow media.
- An additional Mechanical gauge, instead of the top cap, for on site readings.
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