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Microlink Measurement and Control Systems

Products: Microlink pH-Box


How to make pH Measurements through the PC's USB or Ethernet port

pH electrodes have a very high input impedance and so you cannot connect them directly to data acquisition units like the Microlink 751 (USB) or the Microlink 851 (Ethernet). Instead you need a special conditioning unit. Both our USB and Ethernet data loggers use the Microlink pH-Box, which has protected inputs. The amplifiers on the pH-Box convert the pH signals to a level acceptable by the 751 or 851 units. You connect the pH electrodes to BNC sockets on the pH-Box, and use the supplied ribbon cable to plug the pH-Box into the 751 or 851. You can then use the multifunction Microlink units to measure pH as well as temperature, voltage, flow, pressure, level, etc.

The standard pH-Box 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-Box is currently on special offer from Windmill's on-line shop and costs £795. The Ethernet version costs £1095.


More Information on Measuring pH

For more information about monitoring pH see our article on how to measure pH. Other questions just ask.


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Last revised: 11 August 2012