Description
PTFE Coated Thermocouple is a high-performance K-Type temperature sensor specifically designed for highly corrosive chemical environments where conventional stainless steel thermocouples are prone to rapid deterioration. Featuring a premium SS316/SS316L stainless steel sheath with a Teflon (PTFE) coating, this thermocouple provides exceptional resistance against acids, alkalis, chemical solutions, and aggressive process media while delivering reliable temperature measurement up to 250°C.
In many industrial processes such as electroplating, pickling, chemical treatment, and acid bath operations, even corrosion-resistant stainless steel can degrade over time when exposed to concentrated chemicals. The PTFE coating forms a chemically inert protective barrier around the sheath, preventing direct contact between corrosive fluids and the stainless steel while significantly extending sensor life and maintaining measurement accuracy.
The thermocouple incorporates a K-Type (Chromel-Alumel) sensing element with compacted magnesium oxide (MgO) insulation, ensuring fast thermal response, electrical insulation, and dependable temperature measurement. A spring-loaded nickel-plated ceramic terminal block maintains secure electrical contact even in environments subject to vibration or mechanical movement.
This model is supplied with a durable IP65-rated terminal head, while stainless steel terminal heads are available upon request for applications requiring enhanced mechanical durability or hygienic construction. Angle-type assemblies can also be customized for tanks, reactors, and process pipelines where straight insertion is impractical.
Key Features
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Chemically Inert Teflon (PTFE) Coating Impervious shield over the metal probe prevents corrosion from concentrated acids, alkaline baths, and plating chemistry.
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Continuous Thermal Scale Up to 250°C Engineered to match the exact thermal profiles of chemical pickling, etching, and finishing loops.
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Spring-Loaded Ceramic Terminal Block Compresses internal connections to eliminate loose contacts and signal drops caused by machinery vibration.
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High-Purity K-Type Chromel/Alumel Core Delivers globally standardized, self-powered millivolt loop tracking with high linearity.
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Balanced 300 mm Protection Probe The 6 mm OD core provides a rapid thermal response time through the protective polymer jacket.
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Weatherproof IP65 Head Protection Enclosure prevents corrosive airborne vapors, splashes, and ambient moisture from reaching the terminal connections.
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Optional Right-Angle Assemblies Available in custom bent geometries to sit flush against tank walls and avoid internal mixers or agitators.
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Custom Head Materials on Request Can be specified with non-reactive plastic clamping heads or heavy-duty stainless steel terminal enclosures.
Applications
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Electroplating and Metal Finishing Baths Continuous, safe temperature regulation in chrome, zinc, and precious metal plating lines.
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Steel Pickling and Acid Etching Tanks Direct thermal monitoring inside aggressive hydrochloric, sulfuric, or hydrofluoric acid cleaning loops.
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Corrosive Chemical Processing and Transport High-reliability instrumentation for chemical blending vats, raw acid piping, and dosing skids.
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Battery Manufacturing and Fluid Handling Stable temperature tracking within caustic slurry tanks and acid filling machinery.
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Laboratory and Pilot Plant Research Safe temperature measurement for benchtop chemical experiments involving highly reactive solutions.
Datasheet
FAQs
1. What is a PTFE Coated Thermocouple?
A PTFE Coated Thermocouple is a temperature sensor with a stainless steel sheath protected by a Teflon (PTFE) coating. The PTFE coating acts as a chemically inert barrier that protects the sensor from acids, alkalis, corrosive chemicals, and aggressive process media while providing accurate and reliable temperature measurement.
2. Why is PTFE coating used on thermocouples?
PTFE coating significantly improves chemical resistance by preventing corrosive process fluids from attacking the stainless steel sheath. This extends the sensor’s service life, reduces maintenance costs, minimizes equipment downtime, and ensures dependable temperature monitoring in highly aggressive chemical environments.
3. Where are PTFE Coated Thermocouples used?
PTFE Coated Thermocouples are widely used in electroplating plants, acid and alkali tanks, pickling lines, chemical processing industries, pharmaceutical manufacturing, laboratories, wastewater treatment plants, metal finishing facilities, and other industrial applications where superior corrosion resistance is essential.
4. Why choose Aavad Instrument PTFE Coated Thermocouple?
Aavad Instrument Pvt. Ltd. PTFE Coated Thermocouples are manufactured using premium-grade stainless steel, advanced insulation technology, and precision manufacturing processes to deliver accurate temperature measurement, excellent chemical resistance, and long operational life. We offer customized configurations including sheath diameter, insertion length, process connections, terminal head styles, angle assemblies, cable lengths, and thermocouple types to meet the specific requirements of diverse industrial applications.
