Description
Acid and Alkali RTD Sensor with Teflon Protective Sleeve (Model APWS-TF) is a specialized PT100 RTD temperature sensor designed for reliable temperature measurement in compatible corrosive chemical processes involving acids and alkalis. Featuring a high-accuracy Class A PT100 sensing element, mineral-insulated SS316/SS316L stainless steel sheath with 8 mm OD, and an external 12 mm OD Teflon (PTFE) protective sleeve, this corrosion-resistant RTD sensor provides an additional barrier between the metallic sensor sheath and aggressive process media. With a specified sensor temperature range of -50°C to +300°C, the APWS-TF is designed for chemical processing, acid and alkali storage tanks, reactors, vessels, pipelines, and other industrial applications where corrosion resistance and accurate process temperature monitoring are important.
Unlike a rigid or permanently bonded protective coating, the flexible PTFE protective sleeve provides installation flexibility for compatible applications with angled nozzles, irregular vessel geometries, or space constraints. The sensor incorporates compacted mineral insulation for stable temperature measurement and a rugged IP65 die-cast aluminium terminal head with threaded cap and security chain for reliable field termination. Manufactured by Aavad Instrument, this PTFE-sleeved PT100 RTD sensor is suitable for chemical, petrochemical, fertilizer, dye, and specialty chemical processing applications, with material compatibility and allowable continuous operating temperature determined according to the specific process chemical, concentration, pressure, and exposure conditions.
Key Features
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Field-Formable Teflon (PTFE) Sleeve Loose, manual-bending outer sleeve allows installers to shape the probe body on-site to match non-standard tank contours or angled nozzles.
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Aggressive Corrosion Shielding Heavy-duty PTFE barrier isolates the underlying metal from severe chemical erosion and thermal degradation inside concentrated acids and alkalis.
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High-Precision Class A Compliance High-purity platinum element matches strict international DIN-IEC accuracy tolerances ($pm0.15^circtext{C}$ at $0^circtext{C}$) to guarantee tight, reliable process tracking.
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Dual-Layer Sheath Construction Combines a structural 8 mm outer diameter marine-grade SS316/SS316L inner probe with a protective 12 mm outer diameter Teflon sleeve.
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Compacted Mineral Insulation Internal element wiring is densely packed with high-purity mineral insulation to absorb process vibrations and maximize thermal transmission efficiency.
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Rugged IP65 Weatherproof Head Heavy-duty die-cast aluminum terminal enclosure provides absolute protection against ambient chemical vapors, driving rain, and plant dust.
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Threaded Cap with Security Chain Integrated metallic restraint chain prevents drop loss of the threaded enclosure lid during routine maintenance or field inspections.
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Standardized 3/4″ ET Cable Entry Features a single, clean electrical conduit path to facilitate simple and secure wiring hookups for plant engineering crews.
Applications
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Acid and Alkali Chemical Storage Tanks Continuous temperature monitoring inside industrial storage tanks holding aggressive raw acids, caustic alkalis, and chemical reagents with irregular mounting angles.
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Chemical and Petrochemical Reactor Vessels Safe direct-immersion process tracking inside mixing reactors where complex internal fluid agitators require field-bent sensor clearances.
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Fertilizer, Dye, and Specialty Chemical Lines High-reliability measurement across corrosive-media transfer pipelines and distribution networks in heavy industrial processing environments.
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Non-Standard Equipment Infrastructure Drop-in instrumentation setups where unpredictable on-site equipment geometries make standard pre-fabricated rigid sensors impossible to install without manual adjustment.
Datasheet
FAQs
1. What is a Teflon Protective Sleeve RTD Sensor used for?
A Teflon Protective Sleeve RTD Sensor is a PT100 Resistance Temperature Detector (RTD) designed for accurate temperature measurement in highly concentrated acids, alkalis, and other corrosive chemical environments. Aavad’s Model APWS-TF is a Class A simplex PT100 RTD with an operating temperature range of -50°C to +300°C, featuring a bendable mineral-insulated sheath protected by a flexible Teflon (PTFE) sleeve for superior chemical resistance.
2. Why is the sheath bendable on this Teflon-Sleeved RTD Sensor?
The bendable mineral-insulated (MI) construction allows the sensor to be easily routed through angled tank entries, reactors, vessels, and confined installation spaces where a rigid probe cannot be installed. This provides greater installation flexibility while maintaining accurate and reliable temperature measurement.
3. What are the probe and Teflon Sleeve dimensions of this Sensor?
The sensor features an 8 mm outer diameter (OD) mineral-insulated probe enclosed within a 12 mm OD flexible Teflon (PTFE) protective sleeve. It also includes a die-cast aluminum IP65 protection head, a ¾” ET cable entry, and a nickel-plated ceramic terminal block for dependable industrial performance.
4. How does this differ from the Teflon-Coated version of the Acid & Alkali RTD?
This model uses a removable flexible Teflon (PTFE) sleeve fitted over a bendable mineral-insulated sheath, providing enhanced flexibility for complex installations. In contrast, a Teflon-coated RTD has a PTFE coating bonded directly to a rigid SS316 sheath, offering a more compact design with faster thermal response but less installation flexibility.
5. What applications use this Teflon-Sleeved Acid & Alkali RTD Sensor?
Teflon Protective Sleeve RTD Sensors are widely used for acidic process monitoring, alkali temperature measurement, chemical processing plants, reactors, storage tanks, pipelines, electroplating, pharmaceutical manufacturing, and other corrosive industrial applications where aggressive chemicals could damage an unprotected stainless steel temperature sensor.
