Hanna Instruments HI-8299505 AmpHel pH glass bodied combination electrode

AmpHel High Temperature pH electrode with replaceable battery. This electrode has a glass body with a PTFE junction, polymer electrolyte, BNC connector, and its high temperature glass can withstand temperatures of 0 to 100˚C.

Models with a glass body and PTFE junctions are recommended for in-line installations.

Due to the high resistance of the glass membrane, conventional electrodes require a high impedance insulation measurement system.

Inadequate insulation of the connectors and cables results in erroneous readings due to leakage or noise. For conventional electrodes, the lead is therefore limited to typically less than 15-20 meters.

Hanna AmpHel electrodes incorporate a miniaturised amplifier which resolves most of the problems associated with high impedance signals. The amplifier circuitry is located right on top of the electrode and is completely sealed.

As a result, a strong, low impedance signal is emitted and ordinary connectors with long unshielded cables can be used. This breakthrough technology provides a stable signal for industrial monitoring as well as a major saving in low noise coaxial cable costs.

In some cases, the need for a transmitter is also eliminated, resulting in further cost reduction.

For those applications that have been proven particularly hostile to electrodes, Hanna has developed four types of specialised glass. First is an extremely durable sensor glass for general purpose and industrial use.

This glass can withstand the stress of daily use. The remaining types of electrode glass allow continuous monitoring in highly acidic solutions containing fluoride ions, as well as high or low temperature process streams, without significantly reducing the life of the electrode.