Soil moisture sensor SMT100 Pro Truebner

Name: Bodenfeuchtesensor SMT100 Pro Truebner
Brand: Truebner
SKU: SMT100PRO
Price: 199.99 EUR
Availability: InStock

199,99 €

SMT100 Pro – Professional version only with digital interfaces (RS485, SDI-12). NO analog interface, not compatible with analog sensor board.

SKU: SMT100PRO Categories: Professional, Truebner

The SMT100 Pro is a 30 mm shorter version of the proven SMT100 soil moisture sensor from Truebner. This makes it particularly suitable for use where space is limited, for example in column tests for hydrology and structural engineering.

For operation with OpenSprinkler is the Truebner RS485 adapter for OpenSprinkler necessary (requires OpenSprinklerShop firmware).

Comparison: SMT100 vs. SMT100 Pro

feature	SMT100	SMT100 Pro
Probe length	18.2cm	6" (30 mm shorter)
Area of application	Universal	Limited space, column tests
RS-485 (TBUS / Modbus / ASCII)	✓	✓
SDI-12	✓	✓
Analog 0-10V	✓	—
Low-voltage UART (IoT)	✓	—
Operation with OpenSprinkler	RS485 adapter	RS485 adapter
Soil moisture measuring range	0 – 60% VW	0 – 60% VW
Temperature range	-40 to +80 °C	-40 to +80 °C

Technical specifications

Measuring accuracy (soil moisture)	With factory calibration: ± 3% VW (in mineral soils with medium salinity, 0-50% VW) For soil-specific calibration: ± 1% VW
Measuring accuracy (temperature)	Typically ± 0.2 °C, max. ± 0.4 °C (over entire measuring range)
resolution	0.1% VW or better 0.01°C or better
Soil moisture measuring range	0 – 60% VW (up to 100% VW with limited accuracy)
Temperature range	-40 to +80 °C
Additional metrics	Raw data, dielectric permittivity
Interfaces	RS-485 with TBUS RS-485 with Modbus RS-485 with ASCII SDI-12
Power supply	4 – 24 V DC, up to 40 mA during measurement Measuring time: less than 50 ms
Cable length	10 m
Dimensions (probe)	15.2cm × 3cm × 1.2cm
Data logger compatibility	Logger with suitable supply voltage and RS-485 (TBUS, Modbus, ASCII) or SDI-12