Multiplexer Stacked

ECM8™ Electrochemical Multiplexer

The ECM8™ Electrochemical Multiplexer is an affordable way to expand the throughput of your lab. Experiments can be sequentially multiplexed on up to 8 channels. The ECM8™ is ideal for corrosion inhibitor testing, EIS evaluation of paints/coatings, monitoring of field probes for corrosion tests, and chemical sensor development.

Product Details


The ECM8™ Electrochemical Multiplexer partners with a Gamry Potentiostat to convert a single potentiostat into a powerful instrument suitable for sequential multichannel operations. It allows you to sequentially take measurements on up to eight electrochemical cells. The ECM8™ Multiplexer is great for automating repetitive experiments, and for increasing throughput on long-term experiments where data can be taken periodically. Each of the eight Multiplexer channels also incorporates a "local" potentiostat to polarize the sample when not participating in the electrochemical experiment. The ECM8™ is not usable for simultaneous multichannel experiments across multiple cells. For simultaneous multichannel experiments see the multichannel potentiostat.


  • Corrosion Inhibitor Testing
  • Paint/Coating Evaluation
  • Galvanic Corrosion
  • Corrosion Monitoring
  • Chemical Sensor Development

Standard Features

  • 8-channel for sequential measurements.
  • DC and AC experiments.
  • Includes industry standard multiplexed experiments.
  • 8 Local Potentiostats – Inactive channels can be set to open, short, or polarized.
  • Warranty – Protected by 2-year factory service warranty.



Modes Active, Open, Shorted, Local
Excluding communication time
Channel Switching Time <4 msec 
Excluding communication time
Cell Current 1 Amp max Switched 
Input Voltage (operating) ±12 Volts vs. Chassis (except Counter)
Input Voltage (no damage) ±24 Volts vs. Chassis
Counter Electrode Voltage ±120 Volts vs. Chassis


Current Leakage <2 nA max to any electrode in active channel from any source
Impedance >500 MΩ  <20 pF


Input Voltage Ranges 100,120,220,240 V rms
Allowed Voltage Variation ±10% on each range
Power <50 VA


Compliance - Current ±20 mA - 500Ω load
Compliance - Voltage ±11 Volts - 1kΩ load
Applied E Range ±5.12 Volts Working vs. Reference
Resolution >80 dB (10 kHz)
>60 dB (1 MHz)
Zero Offset Error <4 mV typical     0 Volts output
<10 mV max      10 kΩ load
Gain Error <0.2%  -  10 kΩ load
Reference Input Current <50 pA
Note: Applied voltage error is the sum of zero offset and gain errors.  


Baud Rates  300, 600, 1200, 2400, 4800, 9600, 19200
Set via internal DIP switches
Default 9600 - Factory setting
Handshake Hardware via RTS and CTS


Operating Temperature   0 to 45° C
Humidity 0 to 90% - Noncondensing

Product Images



ECM8 120V Multiplexer for Interface 1000/Reference 600 w/Cell Cables - #992-00108
ECM8 240V Multiplexer for Interface 1000/Reference 600 w/Cell Cables - #992-00109
ECM8 120V Multiplexer for Reference 3000 w/Cell Cables - #992-00110
ECM8 240V Multiplexer for Reference 3000 w/Cell Cables - #992-00111
Auxiliary A/D Input Option for ECM8 Multiplexer - #992-00181