AIM Automatic Infiltration Meter

The AIM1 Automatic Infiltration Meter is a stand-alone logging instrument for the measurement of infiltration rates with the tension infiltrometer.

The AIM1 Automatic Infiltration Meter is a convenient solution for infiltration measurements that saves researchers time. The AIM relieves researchers of the need to manually monitor their Infiltrometer with a stop-watch and notepad.

The AIM1 automatically collects infiltration data from a Tension Infiltrometer. Converted and unconverted data is stored within the AIM and can be downloaded as a csv file for further data manipulation and analysis. The AIM can support up to two Tension Infiltrometers or your own Infiltrometer/Permeameter with installation advice from ICT International.

The AIM1 is a fully self-contained unit with 4GB data logging capacity and an internal battery that will last several days’ field work. The battery is easily recharged with a 24V power supply (CH24). Communication is via a USB port or wireless connectivity. The AIM is IP-65 rated and has a Windows and Mac compatible Graphical User Interface.

Infiltrometer Specifications

20cm Model 8cm Model
Specifications US Patent No. 4884436 US Patent No. 4884436
Diameter Disk 20cm 8cm
Inside Diameter Water Reservoir 5.1cm 2.54cm
Inside Diameter Bubbling Tower 2.54cm 2.54cm
Length Water Reservoir 81cm 81cm
Bubbling Pressure Membrane 30cm H2O 30cm H2O
Carrying Case Dimensions (optional) 28cm x 36cm x 107cm 28cm x 36cm x107cm
Pressure Transducer 1 psi (67cm H2O) 1 psi (67cm H2O)

Instrument Logging

Analogue Channels 5 differential
Resolution 0.00001V—24-Bit
Accuracy 0.001V
Minimum Logging Interval 1 second
Delayed Start Suspend Logging, Customised Intervals
Sampling Frequency 10Hz
Communications USB, Wireless Radio Frequency 2.4 GHz
Data Storage MicroSD Card, SD, SDHC & SDXC Compatible (FAT32 format)
Software Compatibility Windows 7, 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.
Temperature Range -40°C to +80°C
R/H Range 0-100%
Upgradeable User Upgradeable firmware using USB boot strap loader function

POWER

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
Example A: With a recommended solar panel and/or recommended power source connected, operation can be continuous.
Example B: Power consumption is dependent on number and type of sensors connected, frequency of measurement and measurement duration