pH and ORP: Sensors

pH sensors

Glass sensors for measuring pH integrate both the pH electrode and the required reference electrode in one unit.

Individual variants differ depending on the purpose of the sensor, mainly in terms of length, shaping of the active part and method of attachment. Sensor cables for laboratory use are terminated with a connector according to the type of instrument used.

Glass electrodes cannot be used in the presence of fluoride ions. In this case, antimony electrodes (available on request) are used. The alternative designations listed below apply to previously supplied sensors.

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• pH sensors dimensions
• Sensor pH 521-BNC dimensions

ORP sensors

Sensors for measuring ORP integrate both the platinum electrode and the required reference electrode in one unit.

Individual variants differ depending on the purpose of the sensor, mainly in terms of length and method of attachment. Sensor cables for laboratory use are terminated with a connector according to the type of instrument used.

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• ORP sensors dimensions

Reference electrodes

For sensors that do not have an integrated reference electrode, separate reference electrodes are required – this is often the case with ion-selective electrodes. Since a pair of separate electrodes is then used, industrial applications will need a suitable probe or flow-through unit that allows at least two sensors to be installed.

Commonly supplied sensors for measuring pH and ORP have the required reference electrodes already integrated, so there is no need to supplement them with additional electrodes.

Temperature sensor TTK21

Separate temperature sensors are primarily used to compensate for the temperature dependence of sensors not equipped with built-in temperature sensing. This improves the accuracy of the measurement. The measured temperature reading is usually also available as an output for the user.

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• Temperature sensors TTK21 - dimensions

Temperature sensors TNiK21, TNiK115

Separate temperature sensors with nickel-type sensing element are only compatible with some older types of our devices. Pay attention to the data in the table.