The SM150 Soil Moisture Sensor has been designed to be a low cost sensor, but without compromising quality and performance. It is buriable and its cylindrical shape makes it easy to install in augered holes (45mm diameter).The threaded base of the sensor can be connected to optional 50cm and 100cm extension tubes. Two sharp pins minimise soil and substrate disturbance during insertion and this permits superior contact for more accurate measurements. Substrate calibrations Irrigation Data logging Instant readings
Features
Overview
The SM150 Sensor is available with substrate calibrations for perlite, coir, peat, and mineral wool, as well as soils - providing a simple, rugged solution to checking the uniformity of growing conditions across many types of growing media.
Accuracy and ease of use make SM150 Soil Moisture Sensors well suited to irrigation applications. Readings can be used to optimise irrigation scheduling, or the SM150 can be installed as part of an automatic irrigation system. The sensor's compact size allows it to be installed in plant pots or grow bags
The SM150 is compatible with most Data Loggers including Neon Interent loggers.
The SM150 can be used with the HH150 meter for instant readings. This combination forms the SM150 Soil Moisture Kit, which comes in a handy carry case as standard.Technical
Accuracy [1] ± 3.0% vol Note [2]
Measurement range Full accuracy over 0 to 70% Measures full range up to100% with reduced accuracy
Salinity range 100 to 1000mS.m -1 Salinity errors <5% from 0 to 60%
Temperature range Full accuracy over 0 to 60 ° C Moisture content readings in frozen soil are not meaningful
Output 0 to 1.5V differential Corresponding to ~ 0 to100% nominal
Sample volume ~55 x 70mm diameter Sample volume extends to ~1 litre, but is weighted towards soil immediately surrounding the rods
Power requirement 5 to 14V, ~18mA for 1s
Environmental IP68 -20 to +60°C operating range
Dimensions 143 x 40mm diameter
Weight 0.1kg Excluding cables
Sensor calibration Sensors are fully interchangeable Individual sensor calibrations not required
Logger / Meter compatibility GP1, DL6, DL2e, HH150 and HH2 Note [3]
[1] Accuracy figures are quoted at an expanded uncertainty coverage level of k=2 (95% confidence levels).
[2] Accuracy at sample conductivity 220mS.m-1, additional salinity errors as stated above.
[3] Maximum cable lengths: 100m for GP1, DL6 and DL2e data loggers.
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