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Water Treatment in Hospitals

In modern hospitals, surgical instrument sterilization holds paramount importance in quality assurance. Adhering to standards like DIN EN 285:2016, the treatment process must strictly align with protocols. Both steam and water used must adhere to specified limits to prevent metal surface deposits and corrosion on instruments.

To meet these stringent requirements, demineralized water is commonly utilized for sterilization. Hospitals deploy water treatment systems to produce this demineralized water, ensuring the efficacy of the sterilization process.

DIN EN 285 stipulates the following limit values for the boiler feed water:
Conductivity       ≤ 5 µS/cm
pH value:           5 – 7
Total hardness   ≤ 0.02 mmol/l
Salt content       ≤ 10 ppm
Phosphate         ≤ 0.5 ppm
Silicate (SiO2)   ≤ 1 ppm
Chloride            ≤ 2 ppm

Our instruments for  monitoring water treatment in hospitals:

Schematic representation of water treatment for the central sterilisation
Practical test with the Testomat® 808 SiO2 in hospitals

To cater to hospitals' need for a straightforward, trustworthy silicate measuring solution, Heyl Brothers has developed the Testomat® 808 SiO2. This limit value measuring device accurately detects silicate levels within the 0.3 to 1.2 ppm range, aligning with DIN standard EN 285:2016 specifications for silicate monitoring.

The device underwent rigorous practical testing over several months in two Hamburg hospitals, emerging triumphantly from this trial period. Silicate measurements were performed downstream of an EDI system in the first hospital. Silicate concentration fluctuations, influenced by the EDI system's amperage, can lead to breakthroughs if the current is set too low, causing deposition and disruption in the ion exchange. The Testomat® 808 SiO2 acts as an immediate alarm for silicate breakthroughs, facilitating prompt inspection.

During our practical testing, no silicate breakthroughs occurred, attesting to the device's reliability and efficacy.

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