Intelligent Sensor Technology
HAMILTON manufactures more than pH sensors. Our electrochemical sensors are reliable tools for application-oriented use and are characterized by high quality, long life and competitive pricing. In order to meet these rigorous requirements we are constantly striving to find unique sensor designs. Extensive work by our research and development department enables HAMILTON to offer the following detailed solutions:


Reliable measurement of Oxygen concentrations and optimal application of the result.

Customer benefits:

  • Measurement: VISIFERM™ DO's measurement principle does not use electrolyte. Therefore, leaking electrolyte from a loose electrode cannot cause any problems.
  • Compatibility: VISIFERM™ DO can be connected without any problems to existing transmitters (via ECS interface) or programmable logic controllers (via 4-20 mA interface).
  • Digital connection: By means of the Modbus RTU interface VISIFERM™ DO can directly communicate with computers or other VISIFERMs™.
  • Data storage: Calibration data is stored in the sensor head. VISIFERM™ DO can be calibrated in the laboratory before it is installed into the process.
  • Diagnostics: A diagnostic function integrated into the sensor detects damages to the oxygen-sensitive luminophore. The diagnostic data is accesible via Modbus RTU.
  • Cross sentivity: The luminophore does not interfere with CO2 and H2S, so the sensor can be used in difficult applications with these gases.
  • The sensor cap can be replaced as easily as the top screw cap on a bottle.
  • Signal stability: VISIFERM™ DO must be rarely recalibrated.
  • Pressure stability: The very robust membrane withstands pressures up to 80 bar.
  • No flow needed: VISIFERM™ DO measures very precisely even in static fluids.


Easier installation, operation and maintenance of pH sensors.

Innovations with Memosens®:
The new Memosens® technology is used for pH sensors.

  • Data storage inside the sensor: Memosens sensor heads store the actual calibration data and further information useful for proactive maintenance, like total uptime, times within a certain range of pH or temperature.
  • Digital signal transmission: The electric analogue measurement values are transformed into stable digital signals in the sensor head.
  • Inductive signal transmission: The transmission of the digital signals to the cable happens inductively, without direct metallic contact.
  • Signal transmission in both directions: Digital signals can go from the sensor to the transmitter, as well as from the transmitter to the sensor.
  • Simple connection: Connector head attaches with a bayonet coupling.

Memosens® in practice:

  • Easy replacement of calibrated sensors.
  • No calibration in the process is necessary, because high quality laboratory calibrations are possible.
  • Easy installation because greater distances between the sensor and the transmitter are possible.
  • Problems with analogue measurements like moisture, corrosion or EMV are principally removed.
  • Inproper wiring of the sensor is impossible.
  • Up to 40% longer life span with Memosens® sensors and less calibration due to optimized sensor maintenance.

Memosens® is a registered trademark of Endress und Hauser AG.