Industrial OEM pH/ORP/ISE Transducer Interface Board.


The board is designed to perform pH, ORP and Ion Selective Electrode (ISE) unity-gain signal isolation and amplification as well as resistance matching function.


If used properly, it will eliminate the need for expensive boards and instruments, which would otherwise be needed to carry out the same measuring tasks, or a pricey PLC.


The board is easy to install, setup and operate. If you want to do professional electrochemistry pH, ORP or ISE readings, The board offers the features you need.


Mounted easily via 0.125" mounting holes using 4-40 screws (optional) and wire via convenient conventional industrial standards cage up terminal blocks (TB).


Setting the board is simple, just follow these easy steps:


1. Power the board of 10 to 24V AC or DC. Preferred stable 24V DC (industrial standard). Model A. Or via custom DC Voltage Model B. 3.0V, 3.3V, 5.0V, 6.0V, 8.0V or 9.0V DC.


2. Connect Digital Volt Meter (DVM), PLC or differential Analog to Digital Converter (ADC) to the board output.


3. Connect your electrode's BNC connector to the input.


The board is ideal when an electrode high impedance signal is required by external remote system such as PLC.


Please drop us a line at and let us know where you use this unique board. Or, of course, if you have any adjustments deemed important--one of our OEM engineers will be happy to help you achieve them.




Shown above configured for pH/ORP/ISE electrode power of 24V DC Model A (left) and custom power of 5V DC model B (right)





Figure A.  Shown above with maximum configuration and options


1. BNC Input pH, ORP or ISE electrode.

2. Terminal Block wires connection: Power Input (left) Signal differential output (Right).

3. Offset-Null Adjustment via multi-turn trimmer.

4. LED Power on indication.





  • Built-in power regulator.

  • Unity gain amplifier.

  • Offset null adjustment via trimmer.

  • LED Power "ON" Indication.

  • Also, designed to operate from 12VDC or 24VDC car battery via our 12v to 9V adapter for remote applications. Can be modified to power of 3.0, 3.3, 5.0, 6.0, 8.0 or 9.0 VDC (customer supply).


PLC, Data loggers, ADC, DCS Systems, Data acquisitions or Receivers/Analyzer Electrodes Interface






Figure B shown above configured for 3 electrochemistry electrodes ORP, pH and ISE


Professional electrochemistry no problems; measure pH, Temperature, ORP and ISE's directly from any PLC utilizing EID's configurable transducers. Easy as 123.



  • Input impedance:                      > 14  T-Ohms ( > 1014 Ohm)  

  • Input voltage:                          +/-2.5V

  • Output voltage:                        VG +/-2.5V

  • PCB material:                            FR4

  • Output Voltage:                        Float (VG)

  • Max power consumption:            0.1W

  • Storage temperature:                40 - 70   [F]

  • Operating temperature:              32 - 140 [F] (0 to 60C) @ 95% RH

  • Power source:                          9V battery or EID's 9V voltage simulator

  • Power indicator:                        LED Red

  • Manufactured:                          100% in USA



  • Pharmaceuticals

  • Waste water treatment

  • Drinking water

  • Heavy metals

  • Flat or low sample volumes

  • Dairy; Cheese, Milk etc.

  • Pool

  • Food and Beverage level readings

  • Oil refineries

  • Titration

  • Pulp & Paper

  • Mining

  • Power Generation

  • Industrial and Municipal Water Treatment

  • Industrial and Municipal Waste Treatment and Neutralization

  • Plating

  • Circuit Board Manufacturing

  • Chemical Processing




Shown above (model A) mounted in plastic enclosure EID-1593 series enclosure (optional)




Shown above encapsulated in plastic translucent blue enclosure (EID-1593 series enclosure) with din-rail-clip




Shown above with 4 wires enclosed with DIN-Rail mount in black enclosure (sold separately).




Plastic enclosure, wires and Din-Rail-clip are sold separately (for demonstration only).



pH, ORP, Temperature connection in a typical Industrial Installation




Shown above (B/W picture), 35mm DIN-Rail's mounting of Five sets of pH Temperature and ORP installation, a total of 15 electrodes. Each individual set is isolated via its own isolated dual output coils transformer. Where, all the transducers output connected ether to PLC or Data Acquisition.




This DIN-Rail "plug and play EID's transducers and interface boards technology," are typically mounted in a water proof NEMA enclosure. This allows the field user to change electrode or transducer while removing the power only from one or transducer or few transducers a the time. Additionally it allows one to set a system where hundred and thousand of channels of electro chemistry transducers are requires such a water treatments facilities etc.


So if you want provisional linear noise free multiple channels measurements of electrodes in a industrial environment give us a call.


PROUDLY DESIGNED, FABRICATED and MADE IN THE U.S.A., all of our transducers and interface board are build with high quality, high grade components and since we are an OEM manufacturing company, as well as R&D facility, we can print your logo on the enclosures and PCBs. We customize the interface boards and transducers to fit your requirements and needs. Just drop us a line at: or call us directly at (704) 366-HELP (4357).





* Prices, SKU#, P# and colors are subject to change without notice. 




pH/ORP/ISE Unity gain transducer Model A



pH/ORP/ISE Unity gain transducer Model A with modify enclosure and Din-Rail clip



pH/ORP/ISE Unity gain transducer, modified to power of 3.0 to 9.0 VDC (customer supply) Model B



pH/ORP/ISE Unity gain transducer, modified to power of 3.0 to 9.0 VDC (customer supply) Model B, with modify enclosure and Din-Rail clip