Soil volumetric water content and temperature measurement probe / HD3910 series
Senseka (formerly Delta Ohm)
Capacitive sensor with low soil invasiveness, high environmental resistance due to resin-sealed housing.
- Two probes are prepared for measuring soil volumetric water content (VWC): the 2-electrode HD3910.1 and the 3-electrode HD3910.2. - Based on the principle of capacitance measurement, it allows for rapid and minimally invasive measurements in agricultural land. - The 3-electrode probe HD3910.2 is particularly suitable for measurements in small sample volumes (such as potted plants). - This probe is factory calibrated, and no additional calibration by the end user is required. - The circuit board is protected by a plastic housing and sealed with epoxy resin, enabling reliable measurements even under harsh environmental conditions. - The RS485 Modbus-RTU output and SDI-12 output versions can be connected to data loggers with respective digital inputs from other manufacturers. - The analog output version is equipped with two voltage outputs of 0.5–3V, 0–2.5V, 0–5V, or 0–10V.
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basic information
■Volumetric Water Content Measurement Principle: Capacitance Measurement Range: 0–60% VWC Resolution: 0.1% VWC Accuracy (at 23℃): ±3%, for 0–50% VWC (standard mineral soil, EC < 5 mS/cm) Measurement Volume: φ100mm × H150mm (HD3910.1) φ80mm × H110mm (HD3910.2) Sensor Operating Temperature: -40 to +60℃ ■Temperature Sensor: NTC 10KΩ (at 25℃) Measurement Range: -40 to +60℃ Resolution: 0.1℃ Accuracy: ±0.5℃ Long-term Stability: 0.1℃/year ■Power Supply DC 3.6–30V (HD3910.xA2.x) DC 5–30V (HD3910.x.x and HD3910.xA.x) DC 6–30V (HD3910.xS.x) DC 7–30V (HD3910.xA5.x) DC 12–30V (HD3910.xA10.x) ■Current Consumption HD3910.x.x: Average 2mA, Peak 15mA (at DC12V) HD3910.xA.x: Average 2.5mA, Peak 15mA (at DC12V) HD3910.x5.x: Standby 300μA (at DC12V) During Measurement <15mA (at DC12V)
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Applications/Examples of results
Agriculture, hydrology, geology applications
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Company information
Sakaki Corporation provides products and services from leading European manufacturers such as "Sensirion (formerly Delta Ohm) (formerly Glaesinger)", "Senseair", "Z-LAZER", and "LSI Lastem" as the official importer and distributor in Japan. Additionally, we develop, support, and undertake custom development and mass production of our own brand network IoT products, including routers and gateways that support camera video and solar power cloud services.