Measurement parameters: volumetric soil moisture unit:% (m3 / m3) Range: 0 to 100% of probe length: 5.3cm diameter of the probe: 3mm Probe material: stainless steel sealing material: epoxy Measurement accuracy: ± 3% Working Temperature range: -40 ℃ ~ 85 ℃ Operating voltage: 5 ~ 12V (voltage type) 12 ~ 24V (current model) Current: 21 ~ 26mA, typ 21mA (voltage type) measurement frequency: 100Mhz output signal: 0 2V voltage output measurement stabilization time: 2 seconds Response time: <1 second measurement area: central probe as the center, around the central diameter of the probe is 7cm, height 7cm cable length of cylinder: 1.5 m (standard) RSD -V1 soil moisture sensor functions and features: compact design of the sensor, portable, installation, operation and maintenance. Reasonable structure design, stainless steel probe life assurance. External epoxy pure colloidal package, sealing, and can be used directly into the soil, and not subject to corrosion. Soil less influence, widely used areas. High accuracy, reliable performance, ensure proper operation. Fast response, high data transmission efficiency. RSD-V1 soil moisture sensor Application: Widely used in water-saving irrigation, greenhouse farm fields, flowers and vegetables, grass pastures, soil-speed measurement, plant culture, science experiments, etc.