The SM150T measures soil moisture and temperature with research grade accuracy 
 · Research grade sensor at a great price
 · Soil moisture and temperature
 · Dependable moisture accuracy ± 3%
 · Robust and buriable.

 Research grade sensor

Patented sensor electronics produce a highly dependable sensor with exceptional salinity and temperature stability. The SM150T is built to withstand long term burial  the sensor,connectors and cable are all environmentally protected to IP68.Moisture accuracy is 3% (after soil specific calibration) and the built-in temperature sensor achieves 0.5°C accuracy.

Data logging and readout

The SM150T is a dual purpose probe ? it can be used portably for instant moisture readings, or left installed in the soil for continuous logging to provide moisture and temperature data. For installed sensors ? The SM150T can be logged by any Delta data logger and by many loggers from other manufacturers (simple 01 V output). For portable applications The SM150T is available as the convenient SM150 Kit, complete with carry case and HH150 readout meter* (NB: the HH150   does not provide temperature indication from the SM150T Sensor). Please see overleaf for more about SM150 Kits.

Specifications

Accuracy:± 0.03 m3.m3 (3%) volumetric water content (VWC)± 0.5°C (0 to 40°C for temp  sensor)

Soil moisture measurement range 0 to 1.0 m3.m3 (100%)But less accurate above 70% VWC

Salinity range

50 to 1000 mS.m1± 5% vol over 100 to 1000 mS.m1 and 0-60% VWC

Temperature range

Full accuracy over: 0 to 60°C Output-0 to 1.0 V differential corresponding to 0 to ~0.6 m3.m3

Power requirement

5?14 V, ~18 mA for 1sMinimum 5 V with 100 m cable

Environmental

IP68 with Delta?T supplied cables

Sample volume

~55 x 70 mm diameter Sample volume is weighted towards soil immediately  surrounding the rods 

Dimensions and weight

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