Better irrigation and soil analysis start with knowing how much water is actually held around the roots or test volume. HD3910 probes measure soil volumetric water content with a capacitive principle, providing fast field readings with minimal disturbance to the surrounding soil.
The family covers both broader soil volumes and restricted spaces. HD3910.1 uses two electrodes and measures a volume of Ø 100 mm x H 150 mm, while HD3910.2 uses three electrodes and is suited to smaller volumes such as pots, with a measuring volume of Ø 80 mm x H 110 mm. Both versions also measure soil temperature with an NTC sensor.
Ready integration helps simplify long-term monitoring in agriculture, hydrology and geology. The probes are factory calibrated, sealed with epoxy resin in a plastic housing and protected to IP67. Output options include RS485 Modbus-RTU, SDI-12 or two analog voltage outputs for VWC and temperature, with fixed 5 m or 10 m cable lengths.
The probe measures soil volumetric water content in the soil volume around the electrodes using a capacitive measuring principle.
HD3910.1 uses two electrodes for a larger measuring volume, while HD3910.2 uses three electrodes for measurement in restricted volumes.
Models are available with RS485 Modbus-RTU, SDI-12 or two analog voltage outputs. Analog versions provide one output for VWC and one for temperature.
Voltage output versions are available with 0.5…3 V, 0…2.5 V, 0…5 V or 0…10 V ranges, depending on the model.
Each probe has a fixed 4-pole cable ending with open wires. Cable length is 5 m or 10 m depending on the model.
The probe can be oriented in any direction, with vertical placement recommended to avoid hindering downward water flow.
Code: HD3910. [1] [2] [3] . [4]
Example: HD3910.2A5.10
[1] Type
1 = Two- electrode
2 = Three-electrode
[2] Type of output
Blank = RS485 Modbus-RTU (default)
A = voltage analog output
S = SDI-12
[3] Analog output range (models with ‘A’)
Blank = 0,5…3 V (default)
2 = 0…2,5 V
5 = 0…5 V
10 = 0…10 V
[4] Cable length
5 = 5 m
10 = 10 m
