soil moisture sensor ML3 Theta probe
Out Of Stock
soil moisture sensor ML3 Theta probe
Attention: Due to the current delivery situation, please request the product by email or via our contact form!
Sensor for determining soil moisture.
The theta probe works according to the principle of frequency domain reflectometry and determines the volumetric water content based on the change in the dielectric constant of the soil. To do this, a standing wave is generated at a frequency of 100 MHz, the amplitude attenuation of which correlates with the soil water content.
The frequency of 100MHz makes the sensor insensitive to changes in soil temperature and salinity.
Improvements to the Theta ML2 probe:
- soil moisture measurement with +/- 1% accuracy
- integrated temperature sensor
- M12 connector
- new, white housing for less heating due to solar radiation
- Improved calibration for use under saline conditions
Technical data:
| Measuring range: | 0 … 100 vol.-% |
| Accuracy: | ± 1 vol.% for soil-specific calibration |
| ± 2 vol.% without calibration | |
| (5 ... 60 vol.-%, 0 ... 40°C) | |
| Resolution: | approx. 0.1 vol.% |
| Measurement accuracy: | For salinity 0-2000mS/m |
| Analog output: | 0 … 1 VDC = 0 … 50 Vol.-% (non-linear) |
| Temperature measurement: | Thermistor, -20 .. 40°C, ± 0.5°C |
| Supply voltage: | 5 … 15 VDC |
| Power consumption: | 20 mA |
| Start-up time: | 5 seconds |
| Operating temperature range: | -40 … +70 °C |
| Protection class: | IP68 |
| Housing material: | PVC, white |
| Dimensions (L/W): | 170 x 40mm |
| Connection: | 5-pin M12 connector, different cable lengths on request |
| Weight: | approx. 350g |
