Can float switches handle corrosive or high-temperature wastewater?

Standard float switches (often made of PVC, polypropylene, or ABS plastic) are suitable for typical sewage and wastewater, but highly corrosive or hot liquids demand special materials. For example, high-temperature wastewater (near boiling or from industrial processes) might require floats made of stainless steel or rated plastics that won’t deform – some floats are rated up to ~60°C, others up to ~90°C, so check the spec. For corrosive chemicals, you must choose float materials that resist those chemicals. Stainless steel floats are durable and chemical-resistant in many cases, but even stainless can corrode in strong acids or in the presence of certain salts (like ferric chloride). Alternatives include Teflon-coated floats, ceramic-based sensors, or using a non-contact level sensor (ultrasonic, etc.) if floats won’t survive. The float’s cable material is also critical – make sure the cable jacket (PVC, rubber, etc.) won’t be degraded by the liquid. Always consult a chemical compatibility chart for the float body, cable jacket, and any gasket materials. In summary, floats can be used in corrosive/hot conditions, but you need the right type – often explicitly sold as “chemical resistant float switch” or “high-temperature float switch” – otherwise their lifespan will be short.