Soil Moisture, Temperature & EC Sensor

Three-parameter soil probe for moisture, -30 to +70 °C temperature and selectable EC ranges, with 0-2 V, RS485 Modbus RTU or SDI-12 output.

Category: Environmental & Agriculture Sensors

Representative image

Representative three-rod soil-probe visual derived from a reviewed exact-model record and independently de-identified. It is not the final ordered-model photograph; moisture range, EC range, output, cable, markings, installation details and documents are confirmed in the quotation.

Specifications

Parameters	Soil moisture by FDR, soil temperature and EC by AC excitation
Moisture range	0–50% or 0–100%, selected when ordering
Moisture accuracy	±2% from 0–50%; ±3% from 51–100%
Moisture resolution	0.03% from 0–50%; 1% from 51–100%
Temperature measurement	-30 to +70 °C; ±0.5 °C; 0.1 °C resolution
EC range options	0–5000, 0–10000 or 0–20000 µS/cm
EC performance	±3% FS; 0.01 mS/cm resolution
Output options	0-2 V, RS485 Modbus RTU or SDI-12; one selected when ordering
Supply	3.6–30 VDC; SDI-12 configuration 5–24 VDC
Current	6 mA at 12 VDC
RS485 default	Modbus RTU, 9600 baud, 8N1, address 0x01
Construction	ABS body; three 316L rods, Ø3 × 70 mm; 45 × 15 × 145 mm
Installation	Surface insertion or buried installation
Environment	-40 to +80 °C operating; IP68; epoxy sealed

Select the output and install the rods without disturbing the soil contact

Range, wiring and installation method affect whether readings can be compared over time.

Choose a 0-50% or 0-100% moisture range and a 0-5000, 0-10000 or 0-20000 µS/cm EC range before release.
Choose one output: 0-2 V, RS485 Modbus RTU or SDI-12. These are ordered alternatives, not simultaneous standard outputs.
The measurement-temperature range is -30 to +70 °C. The separate -40 to +80 °C value is the operating-environment limit.
For surface insertion, push the rods vertically into undisturbed soil. For buried installation, press them horizontally into a prepared pit wall.
Keep the three rods in close soil contact, avoid stones and do not rock the probe after insertion. The effective sensing area is approximately a 70 mm diameter by 70 mm high cylinder around the rods.
IP68 and epoxy sealing protect the probe, but cable joints, lightning protection and the upstream enclosure still require site-specific protection.
Compare EC readings only under a documented soil type, moisture condition and field procedure. Use a laboratory method when a certified salinity result is required.

Typical applications

Irrigation scheduling based on moisture trends at defined root-zone depths
Greenhouse, orchard and field trials that compare multiple sensing points
Seasonal soil moisture, temperature and EC trend monitoring
Buried monitoring installations with a planned inspection and comparison-reading procedure

Inquiries: contact@sungeneiot.com · sungeneiot.com

Specifications are for reference and may be updated; confirm the final spec with SunGene before ordering.