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Capacitance Soil Moisture Sensor You Can Count On
capacitance soil moisture sensor
A lot of soil sensors drift too much or fail in saline ground. Kingmach’s capacitance soil moisture sensor tackles that with a frequency-domain approach—no exposed metal, less corrosion, and readings that stay stable across soil types. It’s built for agronomists, geotech engineers, and researchers who need consistent data without constant recalibration. Whether you’re tracking moisture in a dam embankment, a greenhouse, or a test plot in variable clay and sand, the sensor adapts to project-specific requirements. Our team has been designing measurement instruments for years, so we’ve seen what works in the field and what fails. That experience shapes every unit we ship.
Technical Detail
Configured around process stability, mold life, and long-term uptime.
The Kingmach capacitance soil moisture sensor measures volumetric water content by detecting changes in the dielectric permittivity of the soil. Unlike simple resistance-based probes, it isn’t fooled by fertilizer salts or temperature swings as easily. The probe body is sealed and uses stainless steel or durable plastic that holds up in long-term installations. Output can be analog voltage, current, or digital—SDI-12 and RS485 are common—so tying into your existing logger or SCADA system is straightforward. Custom cable lengths, sensor arrays, and even specialized calibration curves for unusual soils are available; that’s part of our customization service. Kingmach maintains a global distribution network, which means local support and spare parts in most regions. Every order comes with access to our technical team for installation advice and troubleshooting. Applications range from precision irrigation scheduling and landslide early warning to vadose zone research and landfill cover monitoring. If you need a sensor that doesn’t quit after a month in damp soil, we can help.
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View DetailsFAQ
Common technical questions
How does a capacitance sensor compare with TDR or resistance blocks?
TDR is accurate but expensive and sensitive to cables. Resistance blocks are cheap but corrode and respond slowly. Capacitance sensors like ours give a good balance—fast response, lower cost, and they work in saline soils if properly calibrated.
Can the sensor be buried permanently?
Yes, the housing is rated for long-term burial. Just make sure to install it with proper backfill to avoid air gaps and water channeling along the access tube.
What output options do you offer?
Typically 0–2.5 V, 4–20 mA, SDI-12, or RS485. We can bundle the sensor with a handheld reader if you prefer spot measurements.
Do you provide calibration for different soil types?
We can supply a standard mineral soil calibration or work with you to develop a site-specific curve. The sensor comes with a general calibration that works for most loam and clay soils.
What kind of support does Kingmach provide after the sale?
You get access to application engineers—we’ll help with wiring, integration, and troubleshooting. Most issues are resolved within a day by email or a quick call. If a unit fails in the field, we can ship a replacement fast through our regional distributors.
Need a solution for your project?
Share your product type, target capacity, and application requirements. Our team can review the details and recommend a practical next step.