Description
Acid and Alkali RTD with Protection Tube (Model APIS-8×275) is a high-accuracy PT100 RTD temperature sensor designed for reliable temperature measurement in compatible low-concentration acid, alkali, and mildly corrosive industrial processes. Featuring a Simplex PT100 Class A sensing element protected by a robust 8 mm OD SS316 stainless steel protection tube, this industrial temperature sensor provides enhanced mechanical protection without requiring an external Teflon (PTFE) sleeve or coating. With an operating temperature range of -50°C to +250°C, the APIS-8×275 provides stable and repeatable process temperature measurement for chemical tanks, vessels, pipelines, and processing equipment where SS316 offers suitable corrosion resistance for the specific process media.
Designed for demanding chemical process installations, this SS316 protection tube RTD sensor combines mechanical durability with flexible installation options, including extended lengths of up to 1000 mm for deep tanks and vessels and an optional angular assembly for compatible non-perpendicular mounting arrangements. The rugged IP67 die-cast aluminium terminal head with threaded cap and security chain provides reliable protection for electrical terminations, while a single 1/2″ NPT cable entry simplifies field wiring. Manufactured by Aavad Instrument, the APIS-8×275 offers a durable and cost-effective acid and alkali temperature sensor for applications where process media are compatible with SS316 and the additional chemical barrier provided by PTFE is not required.
Key Features
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Thick-Walled SS316 Protection Tube Built with a robust 8 mm outer diameter solid stainless steel outer pipe that delivers outstanding structural rigidity and longevity without relying on a plastic barrier.
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Optimized for Mild Chemical Services Purpose-engineered specifically for low-concentration acid, alkali, and brine loops, offering a highly economical alternative to full Teflon-shielded probes.
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Deep Immersion Custom Lengths Available in custom-tailored fabrication lengths up to 1000 mm to easily monitor deep chemical blending vats and large storage tanks.
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Configurable Angular Mounting Profile Can be ordered with an optional angular head assembly to facilitate effortless installation at non-perpendicular angles inside tight process alcoves.
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High-Precision Class A Compliance Premium-grade platinum element matches tight international DIN-IEC accuracy tolerances ($pm0.15^circtext{C}$ at $0^circtext{C}$) to guarantee precision process tracking.
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Upgraded IP67 Weatherproof Head Ultra-rugged die-cast aluminum terminal block assembly provides absolute dust-tight sealing and waterproof containment against heavy fluid spray.
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Integrated Threaded Cap and Chain Heavy-duty screw-on terminal cover includes a high-tensile metallic safety chain to prevent accidental dropped-component loss during field maintenance.
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Standard Single 1/2″ NPT Conduit Port Engineered with a standard industrial electrical conduit connection point to ensure a tight environmental seal around field wiring loops.
Applications
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Low-Concentration Acid and Alkali Utilities Direct, in-line temperature measurement across fluid processing lines handling dilute chemical mixtures, soft caustic washes, and industrial wastewater treatment brines.
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Deep Chemical Storage and Blending Tanks Deep-immersion thermal monitoring inside vertical processing tanks and storage reservoirs requiring probes up to 1000 mm in length.
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Non-Perpendicular Structural Tapping Points Integration into skewed vessel nozzles, angled pipe manifolds, and tight machinery enclosures utilizing the optional angular assembly.
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Abrasive or High-Velocity Process Pipelines Temperature profiling inside chemical plant infrastructure where high-velocity fluids or abrasive particles would degrade soft Teflon coatings.
Datasheet
FAQs
1. What is an Acid & Alkali RTD with Protection Tube used for?
An Acid & Alkali RTD with Protection Tube is a PT100 Resistance Temperature Detector (RTD) designed to accurately measure the temperature of low-concentrated acids, alkalis, and mildly corrosive process media up to 250°C. Aavad’s Model APIS-8×275 features a robust 8 mm thick-walled SS316 protection tube that shields the internal sensing element from mechanical damage and corrosive process conditions.
2. How long can this Protection-Tube RTD Sensor be manufactured?
Aavad Instrument manufactures this SS316 Protection-Tube RTD Sensor with insertion lengths of up to 1000 mm, making it suitable for deep tanks, vessels, reactors, and pipelines that require a significantly longer probe than flexible Teflon-sleeved RTD sensors.
3. Is an Angular Mounting option available for this Sensor?
Yes. Aavad Instrument offers optional angular RTD assemblies, allowing the sensor to be installed in confined spaces, complex piping layouts, and equipment where a straight in-line installation is not practical.
4. What is the standard construction of the Acid & Alkali RTD with Protection Tube?
The standard sensor features an 8 mm outer diameter (OD) SS316 protection tube with a 275 mm insertion length, compacted Magnesium Oxide (MgO) insulation, a die-cast aluminum IP67 protection head, a 1/2″ NPT cable entry, and a nickel-plated ceramic terminal block for reliable industrial temperature measurement.
5. What is the difference between “Low-Concentrated” and “Highly Concentrated” Acid & Alkali RTD Sensors?
This Protection-Tube RTD Sensor is designed for low-concentrated acids and alkalis, using a durable SS316 protection tube to provide mechanical strength and corrosion resistance. For highly concentrated or more aggressive chemical media, Aavad Instrument offers Teflon-coated RTD Sensors and Teflon-sleeved RTD Sensors, which provide enhanced chemical protection against severe corrosive environments.
