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pH electrodes have a very high input impedance and so you cannot connect them directly to our Microlink 751 USB unit. Instead you need to go through the pH-USB unit, which has protected inputs. The amplifiers on the pH-USB unit convert the pH signals to a level acceptable by the 751 unit. You connect the pH electrodes to BNC sockets on the pH-USB box, and use the supplied ribbon cable to plug the pH-USB into the 751. You can then use the Microlink 751 to measure pH.
The standard pH-USB unit handles 12 pH electrodes, but can be expanded to 16 electrodes on request. The unit costs £500. A complete package, including Windmill data acquisition software, the Microlink 751 measurement unit and the pH-USB conditioning box costs £1095. You will also need a separate power supply.
For more information about monitoring pH just ask.
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