Truebner
SMT50 Soil Moisture Sensor
Capacitive soil moisture and temperature probe, 0–3 V analogue, 10 m cable
$129.95 inc GST Out of stock
Currently sold out.
Free shipping over $150 Not available to order right now. We will have it back once new stock arrives.
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1-year warranty Backed by Truebner
Everything you need to know
Specifications
No specifications match.
Power
- Power
- Hardwired
- Supply voltage
- 3.3 to 30 V DC
- Current draw
- About 2.7 mA (measured at 12 V DC)
- Placement
- Outdoor
- Length
- About 135 mm
- Sensing blade length
- About 95 mm
- Width
- About 21.5 mm
- Weight
- About 235 g, including the cable
- Cable
- 10 m, 4 × 0.25 mm², polyurethane (PUR) jacket, can be buried directly
- Blade
- Fibreglass-reinforced, with the electrodes embedded
- Electronics
- Potted in epoxy
- Reports temperature
- Yes
- Measuring principle
- Capacitive (FDR, frequency domain response)
- Range
- 0 to 50% volumetric water content (VWC)
- Accuracy
- Typically ±3% VWC with factory calibration, in mineral soils with moderate salinity
- Resolution
- 8 bit (0.2% VWC)
- Measuring volume
- Up to about 1 litre of soil around the sensor
- Range
- -20 to +85 °C
- Accuracy
- Typically ±0.8 °C
- Resolution
- 10 mV per °C
- Sensor position
- Inside the black housing, so the whole sensor must be buried
- Moisture output (yellow)
- 0 to 3 V, linear. VWC % = volts × 50 ÷ 3
- Temperature output (green)
- 0.5 V + 0.01 V per °C. °C = (volts - 0.5) × 100
- Output impedance
- 10 kΩ
- Start-up time
- 300 ms maximum
- Brown
- Supply (+VCC)
- White
- Ground (GND)
- Yellow
- Soil moisture output
- Green
- Soil temperature output
- Reads it
- Any controller or data logger that can power it and read a 0 to 3 V analogue input
- Shelly
- Shelly Plus Add-on (Voltmeter peripheral on ANALOG IN), tested on our bench
- SKU
- TRU-SNS-0001
Truebner · SMT50 Soil Moisture Sensor