CS510 OxyGuard Dissolved

Oxygen Probe

An accurate and reliable sensor is a critical element in any measurement system. The OxyGuard Stationary Probe meets these criteria for the measurement of dissolved oxygen.

1. General Information

The OxyGuard Stationary Probe is a galvanic probe which produces a millivolt signal proportional to the amount of oxygen present in the measured medium. Oxygen diffuses through the membrane onto the cathode, reacts chemically, and combines with the anode. An electrical current is produced by this chemical reaction which is converted from microamps to millivolts by an in-line resistor. An in-line thermistor also conditions the signal providing automatic temperature compensation. With these features, the probe produces a millivolt output proportional to the oxygen present in the medium in which it is placed. The probe consists of two parts, an upper part with cathode, anode and cable, and a lower part comprising a screw on membrane cap with fitted membrane. The cap is filled with electrolyte and simply screwed onto the top component.

The probe is self polarizing and requires no external power source. There are only two wires to connect. Cable length is rarely a limiting factor and generally there is no need for shielded wire.

Because the probe's output is linear, it is possible to connect it directly to a data acquisition system capable of handling the small millivolt signal.

The probe's robust construction and simple design make maintenance and servicing it straightforward. There is no need to send the probe back to the factory for servicing. It utilizes a strong, easy-to-clean and easy-to-change membrane in a screw-on membrane cap. Regular servicing is not required. When necessary probe can be fully overhauled in five minutes.

FIGURE 1-1. CS510-L

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