Soil moisture sensors
The SMT100 soil moisture sensor
A robust TDT probe that measures volumetric water content and soil temperature and calibrates itself to your soil — the standard sensor behind SoilSense systems worldwide.
Proven accuracy, soil after soil
The SMT100 uses Time Domain Transmissometry (TDT) to measure how fast an electromagnetic pulse travels through the soil and converts that into volumetric water content. Because it adapts to the soil it sits in, you get dependable readings in sand, loam, and clay without manual tuning.
Why growers choose the SMT100
Auto-calibrating TDT
Adapts to your soil type automatically, so readings stay trustworthy as conditions change across the field.
Moisture and temperature
Reports volumetric water content and soil temperature from a single, compact probe.
Built for the field
A sealed, durable body designed to stay in the ground season after season.
SMT100 technical specifications
Independently validated by the University of Córdoba via AgrifoodTEF, 2026. Read the full validation report.
Explore the system
Let's talk
Want the SMT100 in your field?
Tell us about your crop and soil and we'll help you put together the right SoilSense setup.
No commitment · We'll get back to you as soon as we can
Or stay in the loop
Occasional updates on product releases and the latest in agricultural technology.