Volume sensors for HYDRO 2000
Determining the volumetric water content in the soil
Volume sensors
Volume sensors measure the water content of the soil or substrate in volume fractions; this is displayed as a percentage based on m³ of water per m³ of soil or substrate. It is a measure of the soil moisture and does not give information on the availability of water (suction tension of the soil). It is a direct capacitive measurement. The volumetric sensor forms a capacitor with the soil, the capacitance of which changes with the change in the dielectric property of the soil due to the changing humidity. It should be noted that the dielectric property of the soil is also determined by its structure. The volume sensors need clear contact. Thus, hollow cavities at the sensor must be avoided at all costs. The salinity of the soil also influences the measurement. For accurate measurements, the sensor should be calibrated according to the respective soil type. Volume sensors are maintenance-free, very stable and suitable for installation underground.
Volume sensor SMT50
Measurement of soil moisture according to the FDR principle (Frequeny Domain Reflectory) for simple measurements in the range of 0 to 50 vol. %. Measuring surface: approx. 9 x 2 cm
Volume sensor SMT100
Measurement of soil moisture according to the TDT principle (Time Domain Transmissionmetry) for accurate measurements in the range of 0 to 100 vol. %. Measuring surface: approx. 11 x 3 cm; sensor has programmable settings.
The HYDRO 2000 is an inexpensive measuring device for professional use. It determines the volumetric water content in soil. The SMT 50 sensor works according to the FDR (frequency domain reflectory) principle. It delivers precise results in the relevant measuring range between 0 and 50 % water content by volume, with only slight influences from salinity and soil type. The cable and housing for the sensor are waterproof.
In addition to measuring soil moisture, the HYDRO 2000 can also measure the temperature of the soil. Thanks to its compact and robust design, this measuring device is maintenance-free and suitable for continuous operations.
The HYDRO 2000 can be optionally deliverd with a cable connection for connecting further volume sensors and to handle additional measuring tasks.
| Art.-Nr. | Article incl. VAT, excl. Shipping costs | Cart | |
|---|---|---|---|
| 30008098 | Volumensensor SMT 50 | € 149,94 | |
| with plug for Hydro 2000, 2m cable | |||
| 30008089 | HYDRO 2000 | € 232,05 | |
| Hydro 2000 with plug connection | |||
| 30008100 | Volumensensor SMT 100 | € 228,48 | |
| with plug for Hydro 2000, 2m cable | |||
| Show Cart | |||
| Sensor | |
| Measuring range of SMT 50: | volumetric soil humidity: 0 to 50 vol. % Temperature: -20 to +85°C |
| Measuring accuracy of SMT 50: | Volumetric soil humidity: ±2% in mineral soils with average salinity ranging from 0 to 50% (VWC) Temperature: typically 0.8% |
| Cable length: | 1.2 m |
| Device | |
| Resolution: | ±0.1 vol.% |
| Display: | Liquid crystal display |
| Power supply: | One nine-volt battery, size 6LR61 |
| Degree of protection: | IP 40 |
| Dimensions and weight: | 125 x 78 x 45 mm, 190 g |
