First time presented on the Brau Beviale 2006, the optical oxygen sensor Oxytrans TR of the Centec GmbH has proved itself in multiple applications. The combination of selective oxygen measurement with high accuracy of +/-1ppb, fast reaction time and low-maintenance, compact +construction convinces our customers.

The optical measurement principle works without membrane and electrolyte, is calibrated over the whole range at stage of supply and is installed in the process immediately ready to measure. A polarization time or air calibration are not required anymore. The flat sensor head with Varivent®-flange-connection has no parts extending into the product stream and is from the hygienic point of view optimally designed.

The very compact device has a local display with menu driven software. The oxygen content and the temperature can be directly output as 4-20mA signal, an external evaluation unit is not necessary. Further digital contacts allow an additional output of warning and alarm messages. Typical areas of application are in the filtration for carbonation, HGB blending or water deaeration , in front of the filler or for the wort aeration.

Centec has been involved for many years in the preparation of water treatment plants. Our experienced project teams assists in a cooperative and pragmatic approach to project design, fabrication, implementation and after-sales support.

Our core competencies:
- System Engineering for the design of water treatment systems based on raw water analysis and desired water quality
- Tank manufacturing
- Filter
- Piping
- Single unit fabrication – Softener/RO/EDI/UF
- FAT
- Commissioning & after sales service
- System validation
- Automation
- Integration of additional process components

Ion exchanger:
For the desalination of raw water we offer:
- weak or strong acid cation exchangers
- weak or strong basic anion exchangers
- mixed bed exchangers

As part of the system design, the optimal mode of operation can be utilized using reign beds with high stability in counter current, direct current or swim bed arrangements.

Reverse Osmosis RO:
The use of reverse osmosis treatment step in a permanent deionised water application is preferred. Hot water sanitization is a safe and low energy consumption method for safely sanitizing and increasing high bed regeneration in an automated system.

Electro Deionisation EDI:
EDI units can be used as a water treatment step after the desalination of raw water, when special water requirements are necessary. EDI units can be automatically hot water sanitized to reduce bacterial count and the degradation of organic carbon up to 6.000 Dalton, whether depth or cross-flow filtration is used.

Ultrafiltration UF:
The removal of solids and gels, Ultrafiltration is used as a part of a complete water treatment approach.

CAD:
Standard 2-D and 3-D layout drawings are done prior to fabrication for ease of visualization and approval of the final design.

Validation:
The system starts with creation of a qualification map (QP) outlining equipment details, design details (DQ), installation details (IQ) and functionality (OQ). Followed by the performance qualification (PQ) validation in cooperation with our on-site personnel, when required or requested by the customer.

Automation:
Our systems are designed with the cooperation of the mechanical, electrical and control disciplines to design and implement a complete system as outlined in the qualification. This includes the development of control software according to GAMP4 validation guidelines. As part of the software development, screen wizards are implemented to aid in the ease of operation.

The new mobile O₂-instrument Oxytrans M

measures continuously and exactly the content of oxygen in liquids and gases. The sensor is especially designed for breweries and further applications with high requirements, e.g. power plants or bioreactors. The optical principle of measurement is based on the effect of dynamic luminescence quenching by molecular oxygen. The indicator layer on the glass installed in the measuring head is illuminated with a blue-green-light. With this, the indicator molecules are transferred into an excited state and emit a red light and detected by the internal detector. If oxygen is in the medium, this luminescence effect is prevented by energy transfer to the oxygen molecule. After the collision with the indicator molecule the oxygen molecule is transferred from its ground state (triplet state) to its excited singlet state. As a result, the indicator molecule does not emit luminescence and the measurable luminescence signal decreases linear to existing oxygen concentration. This decreasement is the basis for the oxygen calculation. The O₂-concentration can be displayed in different units like ppb, ppm, %oxygen, etc.