For Contactless Measurements with pH Sensor Spots

Electro-Optical Module EOM-pH-mini

The electro-optical module EOM-pH-mini is a precise OEM solution for non-invasive pH sensors. Assembled according to ISO 9001 they deliver certified quality. In addition, validation and customization of the integrated software is offered.

  • Fast integration with integration package
  • Hundreds of systems in the field
  • Experienced customer support
  • Variety of sensor integrations available
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Pharma Industry: pH Monitoring in Bags

Bags and single-use bioreactors are in the process of revolutionising the way biopharmaceuticals are manufactured. Our non-invasive pH sensors are the tools to make the cultivation vessels fully disposable. As non-invasive DO sensors are also available, the two key parameters oxygen and pH can be controlled online.

Simple Connection to PLC

PLC programming can be a challenging and time-consuming task. Establishing a stable working connection to third-party hardware via interfaces such as RS485 is error prone. PreSens offers you the right support! We provide LAD-schemes and SCL-scripts, the corresponding TIA-project files and even wiring tables to help you connecting your EOM boards to a Siemens-S7-(1200-)PLC, nearly instantly. Nothing stands in the way of further development into company-specific solutions such as process control. Contact our service team!


pH sensorHP5 / HP8
Phase resolution0.05 °
Sampling rateBelow 1 sec.
Supply voltage7 - 18 V
Power consumption in active mode1.5 W
Power consumption in stand-by mode0.6 W
operating / storage
0 °C to + 50 °C / - 10 °C to + 70 °C
Relative humidityup to 80 % (non condensing)
Dimensions40 mm x 100 mm x 22 mm
Weight70 g
Digital interfaceRS232 interface (optional RS485)

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