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Product news
14-01-2021  |  26x
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ISFET pH probe for general laboratory use

CupFET: Robust pH probe for droplet volumes

Wellinq Sensor Solutions offers a comprehensive line of high quality meters and probes for glass-free pH measurement. The SI meter and probe line is created around our proprietary ISFET pH sensor that offers accurate and reliable pH measurement for demanding applications.

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The pH probes, meters and additional accessories are available in the web shop at the Wellinq Sensor Solutions website.

Robust pH probe for droplet volume samples

The CupFET pH probe is especially designed for measurement of small volume samples. Measurements can be performed by placing as little as a single droplet of liquid directly onto the probe’s cup shaped tip. Wellinq’s customers use the CupFET probes to directly measure the pH of fruit in the field by pressing a droplet of juice onto the probe tip. Similarly, in laboratories or industrial processes, they pipet droplets directly onto the CupFET probe tip to measure the pH of samples. Applications for which Wellinq’s customers use pH probes include laboratory testing, environmental water quality monitoring, food quality monitoring and monitoring of pH in pharmaceutical / nutritional processes.

Glass-free ISFET

The ConeFET probe contains Sentron’s non-glass ISFET (Ion Sensitive Field Effect Transistor) pH sensor. This sensing component is Sentron’s proprietary design and has been improved continuously over the past 15 years.
In contrast to conventional glass pH electrodes, ISFET pH sensors are robust and do not require wet storage. This makes them well suited for many environmental, food and pharmaceutical applications. Even in areas like education or in laboratories, where glass pH electrodes can be used, ISFET pH measurement technology offers a much more durable and reliable solution.

Fast response time

ISFET pH sensors are fast because they measure directly at the surface. Wellinq’s SI series probes can give stable readings in under 5 seconds for almost all samples.

Extremely robust

Wellinq Sensor Solutions probes are built from high quality ABS, PVC and PEEK materials. They are resistant to many aggressive solutions and can withstand rugged use. At the same time, they are light weight and easy to handle.
The probes have a polymer body snap-on type connector. Unlike DIN and bayonet type connectors, there are no moving parts nor screw thread that can be damaged.
The position of the ISFET and reference electrode has been designed to be clog and pollution resistant. In the event debris has accumulated on the sensor it can be easily cleaned with water and a brush.
Our probes are provided with protection against Electrostatic Discharge (ESD) ensuring measurements continue even in harsher electrostatic environments.

Easy handling

The ergonomic design makes the probe easy to hold. Its reduced weight and soft flexible cable allow it to be used in long flasks and/or low beakers without tipping the container.

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