The advantages :

- The sensor works drift-free and reliably

- Extremely short response times due to direct contact with the sample

- Unlike membrane sensors the system allows exact temperature compensation over a wide range

- The nature of the system means that there in no zero-point drift

- The sensitivity of the sensor can be checked at any time without interrupting measurement

The stationary DIGOX 5 -

The ideal system for process measurement

The Digox 5 is a continuous analyser for oxygen measurement in drinks production.

The fixed version is designed for the harsh conditions to be found in beverage production.

The measuring system is robust and dependable, even where there are strong fluctuations in pressure and the environment is damp. The measuring system can be sterilized to a temperature of 120°C. and is therefore fully suitable for CIP.

Applications

- Monitoring oxygen content during wort aeration

- Monitoring oxygen content in unfiltered beer prior to filtration

- Monitoring oxygen content after filtration

- Monitoring oxygen content after carbonization

- Monitoring oxygen content before bottling

- Monitoring oxygen content in the degasified water.

The stationary DIGOX 5 -

Process measurement in a bypass

The fully sterilisable Thiedig sensor is operated in a bypass. A pressure gradient of about 0.3 bar is required for this purpose. This pressure gradient is normally achieved by means of a Venturi tube mounted in the main pipe. The Venturi tube is a hydrodynamically shaped pipe narrowing, which creates a pressure difference at that point without noticeable loss of pressure

in the main system.

This pressure difference is used for a secondary flow of approx. 10 litres per hour through the Thiedig sensor. It is also possible to use a plant's existing pressure gradients, for example, at a pump or pressure reduction valve.

Accuracy at all times - Thiedig active calibration

The Thiedig sensor is the only sensor that can be calibrated without interrupting measurements.

The calibration takes place in the measuring sample, and the calibration point is within the measuring range. The active calibration is based on Faraday's law and a volume measurement.

It is therefore based on measurement variables independent of the system. Using electrolysis, an exact concentration of oxygen is created in a flow cell by means of a set current and a known flow rate. This calibration concentration establishes the measuring sensitivity of the sensor.

The method makes it possible to determine the correlation between oxygen content and measuring current.

The microprocessor extrapolates these exactly through the zero point, which, in the case of the Thiedig sensor, is fixed by the nature of the system.

Advantages

- Calibration is fast and automatic

- If doubts arise, measurement values can be double-checked by immediate re-calibration  without any interruption to measurement

- Since calibration takes plate in the measurement sample, there are no external effects from any other substances

- The data are stored automatically and can be recalled and recorded

The stationary DIGOX 5 -

The specialist for particular tasks

Oxygen monitoring for wort aeration in beer production

The aeration of beer wort before fermentation is of decisive importance for the exploitation of the fermentation process. Too little aeration of the wort results in premature death of the yeast cells and thus incomplete fermentation.

The conditions linked to wort ventilation, such as the suspended matter content and the need for frequent cleaning, make reliable measurement particularly difficult at such a location.

The special design of the Digox 5 for wort measurement provides a reliable solution for this particular task.

A special measuring electrode supplies dependable measurements from the beer wort.

A fully sterilisable micropump prevents flow rate fluctuations through the measuring system.

DIGOX 5 - process measurement after water degasification

Degasified water is playing an ever increasing role in beverage production. Oxygen-free water is also contributing to achieving low levels of oxygen pollution in production.

Because of its low oxygen values water degasification makes high demands on a measuring system.

The Digox 5 is also the appropriate measuring system at this critical point in the production process. Oxygen values are measured with a resolution of 1 µg/l. exactly and with replicability, even in the range below 20 mg/l.

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