SMM3 Soil Moisture Meter
The SMM Soil Moisture Meter is a stand-alone logging instrument for the measurement of volumetric moisture content and soil water potential of soils and other materials.
The SMM can support up to 10 capacitance sensors (10HS or EC5). With a soil water characteristic curve, the SMM can be programmed to simultaneously measure soil water content and soil water potential. Or, up to 10 channels can measure soil water potential. The SMM is a fully self-contained unit requiring power input from a 22W solar panel (field applications) or 24V power supply (laboratory applications). Communication is via a USB port or wireless connectivity. The SMM is IP-65 rated and has a Windows and Mac compatible GUI for complete logging solutions including look-up tables, scripts and sensor calibration capabilities.
- The SMM is a stand-alone instrument and does not have extensive cabling and power requirements. All data is stored within the unit on a removable MicroSD card.
- Communication with the SMM is made either with a USB or wireless connection. Wireless is capable of a range of up to 250m.
- The SMM has a Windows and Mac compatible configuration software. The software is GUI based and extremely user friendly. Custom calibration equations or data can be entered and edited via the software. Real-time measurements, diagnostics and sensor configurations can easily be made.
- The SMM has a 2 wire, non-polarised bus for power input. There is no chance of incorrect wiring of positive and negative voltage because the SMM is non-polarised.
- The SMM has an internal lithium-polymer battery that is kept charged by an external power supply (solar panel or mains). The instrument has an internal voltage regulation for maximum power reliability.
- The SMM is IP65 rated and has been demonstrated to operate in extreme environmental conditions. Units are being used in diverse environments from hot Australian deserts, tropical Amazon rainforests, temperate German forests, Indian agricultural fields and North American Arctic cold.
Applications:
- Soil volumetric moisture content (%)
- Forest and catchment hydrology
- Soil columns and geo-engineering
- Railway Embankment
- Mine Closure-Cover Design Modelling & Performance Monitoring
- Landfill-GCL & Phytoremediation Performance
- Modelling Water Movement
Instrument Logging |
|
| Analogue Channels | 10 single ended |
| Resolution | 0.00001V—24-Bit |
| Accuracy | 0.001V |
| Minimum Logging Interval | 1 second |
| Delayed Start | Suspend Logging, Customised Intervals |
| Sampling Frequency | 10Hz |
Data |
|
| Communications | USB, Wireless Radio Frequency 2.4 GHz |
| Data Storage | MicroSD Card, SDHC & SDXC Compatible (FAT32 format) |
| Software Compatibility | Windows 8, 8.1 & 10. Mac OS X. |
| Data Compatibility | FAT32 compatible for direct exchange of SD card with any Windows PC |
| Data File Format | Comma Separated Values (CSV) for compatibility with all software programs |
| Memory Capacity | Up to 16GB, 4GB microSD card included. |
Operating Conditions |
|
| Temperature Range | -40°C to +80°C |
| R/H Range | 0-100% |
| Upgradable | User Upgradeable firmware using USB boot strap loader function |
POWER |
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| Internal Battery Specifications | |||
| 960mAh Lithium Polymer, 4.20 Volts fully charged | |||
| External Power Requirements | |||
| Bus Power | 8-30 Volts DC, non-polarised, current draw is 190mA maximum at 17 volts per logger | ||
| USB Power | 5 Volts DC | ||
| Internal Charge Rate | |||
| Bus Power | 60mA – 200mA Variable internal charge rate, maximum charge rate of 200mA active when the external voltage rises above 16 Volts DC | ||
| USB Power | 100mA fixed charge rate | ||
| Internal Power Management | |||
| Fully Charged Battery | 4.20 Volts | ||
| Low Power Mode | 3.60 Volts – Instrument ceases to take measurements | ||
| Discharged Battery | 2.90 Volts – Instrument automatically switches off at and below this voltage when no external power connected. | ||
| Battery Life varies | |||
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Decagon EC-5 Moisture
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