This device, based on electrochemical impedance spectroscopy (EIS), enables continuous monitoring of TS sensor impedance by applying voltages at two specific frequencies.
Logger Lineup
Corrosion Monitor
SICM-714B/718B
- Measure up to 2 sensors.
- Battery or AC adapter powered.
Custom specifications available to suit your environment.
For any requests, please contact us
Specifications
Atmospheric corrosion systems under electrolyte immersion and a water film are represented by the equivalent circuit:
Z: Impedance
Rp: Polarization resistance (∝ corrosion resistance)
Cdl: Electric double layer capacitance
Rs: Solution resistance
Since it can be approximated that:
- Z ≒ Rs when ω→∞
- Z ≒ Rs + Rp when ω→0
The solution resistance Rs can be measured from the high frequency side, and the polarization resistance Rp can be calculated by subtracting the value on the high frequency side from the value on the low frequency side.
The inverse of the polarization resistance is correlated with the corrosion rate. Therefore, it is possible to grasp the change in the corrosion rate over time.
Number of Measurement Channels
SICM-714B: max.4
SICM-718B: max.8
Data Acquisition and Format
10 mins interval (Adjustment Possible)
Applied voltage
Sine wave, Select 20mVp-p, or 100mVp-p
Impedance measurement range
High frequency ～10 5 Ω, Low frequency ～10 9 Ω
How to measure
AC impedance measurement with DFI
Noise reduction
Noise cancellation by integrating 1 to 8 cycles,
Noise removal with shield/guard function,
Cable stray capacitance cancellation
Data Acquisition and Format
10 mins interval (Adjustment Possible)
Recorded data
Time, Solution resistance“Rs ”, Corrosion resistance “Rc ”,
Electric double layer capacitance “Cdl ”, Phase difference
Data Acquisition and Format
Text format (readable by spreadsheet software, etc.)
Data storage
Industrial SD card
Power
100V AC / 12V Battery
Weight
SICM-714B: Approx.1.7kg
SICM-718B: Approx.1.9kg
Size
260mm×180mm×100mm (Excluding protrusions)