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York University, Toronto
- Complete low-cost kit
- ± 3% accuracy
- Portable and easy to use
The SM150 Soil Moisture Kit provides an affordable and easy-to-use tool for obtaining reliable moisture measurements with minimal soil or substrate disturbance.
Introduction
The kit comprises an SM150T* Soil Moisture Sensor, a dedicated readout meter and a carry case. The cable and connector are watertight – an essential requirement for potentially wet environments.
The meter displays volumetric water content (% volume). Please note that although the SM150T Sensor has a built-in temperature sensor, the meter does not measure or display temperature.
Simple operation
The meter is lightweight and is very easy to use, being a readout-only device (no data recording or PC complications). Operation is simple – just insert the SM150T into the soil or substrate and press the Read button to make a reading.
Horticulture applications
The SM150 Kit comes with substrate calibrations for perlite, coir, peat, and mineral wool, as well as soils – providing a rapid, rugged solution for checking the uniformity of growing conditions for many types of growing media.
The SM150T is easy to insert and install – its sharp pins minimise soil disturbance and preserve the original soil structure around the measurement rods.
Other Delta-T soil moisture kits
Two alternative Delta-T Devices moisture measurement kits are available if greater accuracy or electrical conductivity (EC) measurements are required.
*The SM150 Kit was previously supplied with the SM150 Sensor, but now comes with the SM150T Sensor.
Specification
| 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 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 |
| HH150 Meter | |
| Accuracy | 0.5% of full scale over 5-40 °C (±7.5mV – negligible effect on SM150 accuracy) |
| Resolution | 0.1% of voltage reading |
| Battery life/standby life | 2 x GP alkaline AAA/ 10000 readings/1 year |
| Environmental | Non-condensing |
| Compliance | CE, FCC & ROHS |
Accessories
Hardware
Main components and software
Mountings and enclosures
Installation accessories
Cables and networks
GPRS remote comms
Spares and consumables
Power options
Other
Product Resources
Data Sheets
- SM150T System Integrator Data Sheet 3 MB
Filename: SM150T_System_Integrator_data_sheet_v.1