Name: SM150T Soil Moisture Sensor
Brand: Delta-T Devices
SKU: IDELSM150T
Price: 5081.95 ZAR
Availability: OutOfStock

Details

Description

Specifications

Downloads

The SM150T Soil Moisture Sensor measures soil moisture and temperature with research-grade accuracy. It offers stable, robust, and reliable performance at a great price.

Research-grade soil moisture sensor

The SM150T Soil Moisture Sensor’s advanced patented electronics and tough build produce a highly reliable soil moisture sensor with exceptional salinity and temperature stability. The SM150T Soil Moisture Sensor is engineered to withstand long-term burial; the sensor, connectors, and cable are all environmentally protected to IP68. It offers moisture accuracy of ± 3% (after soil-specific calibration), and the built-in temperature sensor achieves ± 0.5°C.

Data logging and readout

The SM150T Soil Moisture Sensor is a dual-purpose soil moisture sensor; it can be used portably for instant moisture readings or left installed in the soil connected to a data logger to provide long-term moisture and temperature data.

For installed sensors: The SM150T Soil Moisture Sensor can be logged by any Delta-T Devices data logger and by many loggers from other manufacturers (simple 0-1 V output for moisture, 10K thermistor for temperature). To record temperature, the sensor must be fully buried and connected to a data logger.

For portable use: The SM150T Soil Moisture Sensor is available as part of the convenient SM150 Kit, complete with a carry case and HH150 readout meter. Please note that the HH150 Meter supplied with the SM150 Kit is a readout-only device. If PC connectivity for data storage and download is a requirement, the SM150T Soil Moisture Sensor should be used with the HH2 Moisture Meter instead.

NB: When used in portable mode, the SM150T Soil Moisture Sensor does not provide a temperature indication.

Installation

The SM150T Soil Moisture Sensor is easy to insert and install; its sharp pins minimise soil disturbance and preserve the original soil structure around the measurement rods. For burial at depth, the cylindrical shape facilitates installation in augered holes. The threaded base of the sensor can be connected to optional 50cm and 100cm extension tubes, which assist with placement and removal. The SM150T Soil Moisture Sensor uses the same high-quality range of cables and extensions as the ML3 and EQ3 sensors.

Calibration

The SM150T Soil Moisture Sensor comes complete with general calibrations for mineral and organic soils. A two-point soil-specific calibration can be performed for greater accuracy if required.

Applications

Soil science
Horticulture
Irrigation

Measurement	Volumetric water content and soil temperature
Accuracy	± 0.03 m³.m^-3 (3%) With soil-specific calibration ± 0.5°C (0 to 40°C for temp sensor) ± 0.75°C (-20 to +60°C for temp sensor)
Soil moisture measurement range	Full accuracy over: 0 to 0.7 m³.m^-3 Full range: 0 to 1.0 m³.m^-3
Salinity range	50 to 500 mS.m^-1 Salinity errors < 0.035 m³.m^-3 from 0.05 to 0.4 m³.m^-3. Can be calibrated up to 2000 mS.m^-1
Temperature range	Full accuracy over: 0 to 40°C
Output	0 to 1.0 V differential Corresponding to 0 to ~0.6 m³.m^-3 Resistance 5.8Ω to 28Ω for temp sensor
Power requirement	5-14 V, ~18 mA for 1s Minimum 5 V with 100 m cable
Environmental	IP68 (-40 to +70°C)
Sample volume	~55 x 70 mm diameter Sample volume is weighted towards soil immediately surrounding the rods
Dimensions	Overall: 143 x 40 mm diameter Rods: 51 mm x 2.5 mm diameter
Weight	0.1 kg (exc. cable)
Sensor calibrations	Individual sensors are interchangeable Recalibration advised every 3 years (depending on use)
Soil calibrations	Generalised Mineral and Organic soil calibrations are supplied