{"id":32520,"date":"2026-03-12T11:36:15","date_gmt":"2026-03-12T10:36:15","guid":{"rendered":"https:\/\/rls-wacon.de\/produkt\/caldur-sulfite-colorimetric\/"},"modified":"2026-03-12T11:36:15","modified_gmt":"2026-03-12T10:36:15","slug":"caldur-sulfite-colorimetric","status":"publish","type":"product","link":"https:\/\/rls-wacon.de\/en\/produkt\/caldur-sulfite-colorimetric\/","title":{"rendered":"Caldur\u00ae Sulfite &#8211; Colorimetric"},"content":{"rendered":"<h2>CALDUR\u00ae Sulfite Test Set &#8211; Colorimetric<\/h2>\n<h3>What is Sulfite measured for?<\/h3>\n<p>Sulfite (SO\u2083\u00b2-) is used in water treatment as an oxygen binding agent to prevent corrosion<br \/>\nin steam boilers, heating systems and closed cooling systems. As a reducing agent<br \/>\n, Sulfite reacts with dissolved oxygen and thus protects pipelines and system components from<br \/>\noxygen corrosion. <\/p>\n<p><strong>The optimum Sulfite concentration in boiler water is 20-30 mg\/l SO\u2083\u00b2-.<\/strong><br \/>\nRegular monitoring is essential, as values that are too low do not provide sufficient corrosion protection<br \/>\n, while concentrations that are too high are uneconomical and promote the formation of Sulfite.<\/p>\n<p>Sulfite is also used as a preservative and antioxidant in the food industry.<br \/>\nMonitoring the concentration of sulfite is therefore of great importance in various industrial sectors.<\/p>\n<h3>How does the test set work?<\/h3>\n<p>The CALDUR\u00ae Sulfite Test Set &#8211; Colorimetric is based on the proven thiobenzoic acid method.<br \/>\nAfter adding two reagents to the water sample, a<br \/>\ncharacteristic color develops within 3 minutes, the intensity of which is proportional to the Sulfite concentration.<\/p>\n<p>The measured value is determined by direct color comparison with a supplied 6-level color chart.<br \/>\nOptionally, the sample can also be evaluated photometrically with the WINLAB Data Line photometer.<\/p>\n<h3>Advantages of the CALDUR\u00ae test set<\/h3>\n<ul class=\"feature-list\">\n<li>Quick analysis in just 3 minutes\n<p style=\"text-indent: 30px; font-style: italic;\">Ideal for regular checks in boiler systems &#8211; immediate results on site<\/p>\n<\/li>\n<li>Wide measuring range from 0.5 to 20 mg\/l SO\u2083\u00b2-\n<p style=\"text-indent: 30px; font-style: italic;\">Covers the entire practical range for boiler water and industrial applications<\/p>\n<\/li>\n<li>150 provisions per set &#8211; economical in continuous use\n<p style=\"text-indent: 30px; font-style: italic;\">Cost-efficient for daily checks in power plants, heating systems and industrial operations<\/p>\n<\/li>\n<li>Can be used colorimetrically and optionally photometrically\n<p style=\"text-indent: 30px; font-style: italic;\">Flexible for simple on-site tests or precise laboratory analyses with photometer<\/p>\n<\/li>\n<li>Easy handling without special equipment\n<p style=\"text-indent: 30px; font-style: italic;\">No additional technology required &#8211; ideal for quick routine checks<\/p>\n<\/li>\n<li>Robust, waterproof plastic housing with hinged lid\n<p style=\"text-indent: 30px; font-style: italic;\">Safe transportation and protection of reagents &#8211; durable and reliable even under harsh conditions<\/p>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>CALDUR\u00ae Sulfite Test Set &#8211; Colorimetric What is Sulfite measured for? Sulfite (SO\u2083\u00b2-) is used in water treatment as an oxygen binding agent to prevent corrosion in steam boilers, heating systems and closed cooling systems. As a reducing agent , Sulfite reacts with dissolved oxygen and thus protects pipelines and system components from oxygen corrosion. 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