>> According to the German Water Directive, government offices can insist that land and water be monitored in order to give an early warning of potential contamination. Therefore, many of the system operators have decided to continuously monitor their effluent with a TOC analyzer just to be sure that they are in compliance. The decision to do so is not an easy one: there are no rules or guidelines for the on-line operation of a TOC analyzer. There are no procedural guidelines nor approval requirements for these analyzers either. As a result, there are a large number of analyzers on the market using various different measuring methods: thermal oxidation, UV-oxidation, chemical oxidation, differential conductivity measurement, UV absorption and many others.

The disadvantage: each type of on-line instrument or analysis method can produce substantially different results than the government-approved laboratory method, with which the TOC limit value is subsequently compared. In these tests, a so-called “random sample” or “ two hour mixed sample” is compared to the laboratory analysis. The limit value is said to be met if 4 out of 5 of the last laboratory results do not exceed this value.

If a system operator chooses an on-line analyser he has a very hard decision. He must depend upon his trust of the supplier, the quality of service, confidence in the salesperson, the requirements of the measurement accuracy and last but not least, his decision is also influenced by his budget.

Operating managers can make their lives easier by choosing the proven TOCOR 200: The instrument covers the complete spectrum of requirements for on-line TOC analyzers and can be constructed either with a UV or with a thermal oxidation reactor. It uses the measuring principle which is officially stipulated for a laboratory TOC measuring instrument.

In chemical and petrochemical industrial plants this instrument is used in many applications: It can monitor the purity of the condensate return from the process steam, the surface and/or rain water for contamination and the cooling water circulation loops for leaks in the heat exchangers. It measures the pollutant concentrations in highly contaminated feed streams to the wastewater treatment plant as well as the effluent streams for compliance to government limits.

We offer the optimum SICK-MAIHAK instrument configuration for each application even for installation in Ex-hazardous areas, if necessary. Despite the various different requirements for the analyzer based on the variety of samples, the operator interface is always the same and is easy to understand.