Description
Flameproof RTD with Sanitary Fitting (Model APFS-Tri) is a specialized PT100 flameproof temperature sensor engineered for accurate temperature measurement in hazardous industrial areas that also require hygienic process connections. Featuring a Simplex 3-wire PT100 sensing element, mineral-insulated SS316 stainless steel sheath, rugged IP67 flameproof die-cast aluminium terminal head, and 2-inch Tri-Clover (Tri-Clamp) sanitary connection, this industrial RTD sensor combines hazardous-area protection with hygienic process integration. Designed for a temperature range of -50°C to +400°C, it is suitable for pharmaceutical, food and beverage, chemical, fermentation, and other process applications where both explosion protection and sanitary equipment design are important considerations.
The 2-inch Tri-Clamp sanitary process connection enables convenient installation and disconnection from compatible hygienic process equipment, supporting cleaning and maintenance procedures in suitable CIP (Clean-in-Place) systems, while the flameproof terminal head provides protection for electrical terminations in appropriately classified hazardous locations. According to the specified configuration, the sensor is available for gas groups I, IIA, and IIB, with IIC-rated configurations available on request, subject to the applicable product certification and project requirements. Manufactured by Aavad Instrument, the APFS-Tri can also be configured with alternative terminal-head materials, including cast iron, SS304, and SS316, making it a versatile flameproof sanitary RTD sensor for demanding hygienic and hazardous-area temperature measurement applications.
Key Features
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Dual Hazardous and Hygienic Compliance Uniquely combines an explosion-proof certified terminal enclosure with a sterile sanitary fitting to satisfy both ATEX/IECEx safety codes and CIP design guidelines.
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Explosion-Proof Certified Enclosure Rugged die-cast aluminum terminal head certified for Gas Groups I, IIA, and IIB to contain internal sparks and mitigate ignition risks in volatile atmospheres.
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Hygienic 2″ Tri-Clover Fitting Integrates a standard 2″ Tri-Clamp process interface enabling rapid, tool-free disconnection for equipment wash-downs and routine mechanical sterilization.
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Hydrogen Environment Ready Upgrades Available with advanced Gas Group IIC design modifications to safely operate near hydrogen-adjacent process loops and gas streams.
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Corrosion-Resistant SS316 Mineral Probe Mineral-insulated marine-grade stainless steel sheath absorbs severe thermal cycles and dampens high-frequency mechanical pipeline vibrations.
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Robust IP67 Waterproof Rating Heavy-duty threaded cap enclosure with an integrated security chain keeps internal wiring dry against high-pressure wash-downs and driving rain.
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Configurable Head Metallurgy Terminal housing can be custom ordered in cast iron, SS304, or SS316 stainless steel to match specific chemical and wash-down regimes.
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Simplified Field Cable Management Built with a single 1/2″ Female NPT conduit entry port to maintain a secure, flameproof environmental seal around incoming instrumentation wires.
Applications
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Pharmaceutical Manufacturing Hazardous Zones Continuous temperature monitoring inside alcohol extraction units, fluid bed dryers, and solvent storage vessels requiring intrinsic ignition barriers.
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Food and Beverage Processing Loops Precision thermal profiling within high-risk spray-drying towers, solvent recovery systems, and industrial fermentation chambers.
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Clean-in-Place (CIP) Process Equipment Safe integration into automated cleaning loops located inside classified explosive gas areas.
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Chemical Plants with Hygienic Mandates Deployment in specialized chemical reactors and blending vessels requiring both explosion-proof certification and smooth, non-contaminating process joints.
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Hydrogen-Adjacent Process Infrastructure High-reliability measurement across alternative energy processing skids, charging loops, and gas storage enclosures requiring IIC ratings.
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Oil and Gas Sanitary Utilities Reliable temperature measurement inside offshore production modules and refinery utilities that use specialized sanitary process configurations.
Datasheet
FAQs
1. What is a Flameproof Sanitary RTD Sensor with Tri-Clover Fitting?
A Flameproof Sanitary RTD Sensor combines an explosion-proof die-cast aluminum protection head with a hygienic 2″ Tri-Clover (Tri-Clamp) process connection, enabling safe and accurate temperature measurement in hazardous gas atmospheres while meeting sanitary process requirements. Aavad’s Model APFS-Tri is a 3-wire PT100 RTD Sensor with an operating temperature range of -50°C to +400°C and an IP67 protection rating.
2. What gas group certifications does this Flameproof RTD Sensor carry?
The standard flameproof protection head is certified for Gas Groups I, IIA, and IIB. Aavad Instrument can also manufacture assemblies certified for Gas Group IIC (Hydrogen), the highest hazardous gas classification, on request for applications requiring enhanced explosion protection.
3. What head materials are available for the Flameproof Sanitary RTD Sensor?
In addition to the standard die-cast aluminum flameproof head, Aavad Instrument offers optional protection heads manufactured from cast iron, SS304 stainless steel, and SS316 stainless steel, allowing selection based on corrosion resistance, process conditions, and hazardous-area classification requirements.
4. What is the Process Connection and Cable Entry configuration?
This sensor features a 2″ Tri-Clover (Tri-Clamp) hygienic process connection, a 1/2″ (Female) NPT cable entry, an SS316 stainless steel probe with a 6 mm outer diameter (OD), a 200 mm total probe length below the head, and a 150 mm insertion length below the Tri-Clover fitting.
5. Where is a Flameproof Sanitary RTD Sensor typically used?
Flameproof Sanitary RTD Sensors are widely used in hazardous gas areas, chemical processing plants, oil & gas facilities, hydrogen-rich environments, pharmaceutical manufacturing, specialty chemical processing, and other hygienic industrial applications where both explosion protection and sanitary Tri-Clover process connections are required.
