Description
Flameproof RTD Sensor Standard Assembly (Model APFS-6×2800) is a long-reach PT100 flameproof temperature sensor engineered for accurate temperature measurement at deep and difficult-to-access points in appropriately classified hazardous industrial areas. Featuring an extended 2800 mm sensing assembly, Simplex 3-wire PT100 Class A element, 6 mm OD SS316 stainless steel sheath, and a rugged IP67 flameproof die-cast aluminium terminal head, this industrial RTD sensor delivers reliable temperature measurement across an operating range of -50°C to +400°C. Its extended-length construction makes it ideal for tall furnaces, kiln chambers, deep reactors, vertical process vessels, columns, towers, and other hazardous-area applications where conventional RTD probe lengths cannot reach the required measurement point.
Designed for demanding hazardous-area process temperature measurement, the Model APFS-6×2800 combines mineral-insulated construction with an adjustable 1/2″ BSP(M) compression fitting, allowing the insertion depth to be configured during installation according to compatible equipment and process geometry. According to the specified configuration, the flameproof enclosure is available for gas groups I, IIA, and IIB, subject to applicable product certification and site classification requirements. Manufactured by Aavad Instrument, this long-length flameproof RTD sensor provides a dependable temperature monitoring solution for oil and gas processing, chemical and petrochemical plants, furnaces, kilns, cement plants, steel facilities, reactors, and heavy process industries requiring extended-reach PT100 temperature sensing in classified locations.
Key Features
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Extended 2800 mm Probe Geometry Extra-long design engineered specifically for deep immersion tracking inside tall furnaces, vertical kiln chambers, and massive chemical process towers.
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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 electrical sparks and safely operate in volatile environments.
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Adjustable BSP Compression Fitting Features a sliding 1/2″ Male BSP compression connector that allows field installers to dynamically tune and secure the probe depth during final mounting.
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High-Precision Class A Compliance Premium platinum resistance element matches tight international DIN-IEC accuracy tolerances ($pm0.15^circtext{C}$ at $0^circtext{C}$) to guarantee precision tracking across its full thermal range.
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Ceramic-Protected Mineral Core Advanced mineral-insulated configuration backed by ceramic reinforcement provides the long-reach probe body with extreme mechanical durability and long-term signal stability.
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Corrosion-Resistant SS316 Sheath Marine-grade stainless steel body with a 6 mm outer diameter offers superior resistance to physical wear, oxidation, and chemical corrosion.
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Broad Spectrum Thermal Tracking Provides stable and highly predictable temperature measurements across a demanding operational range spanning from -50°C to 400°C.
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Streamlined Field Conduit Wiring Outfitted with a secure single cable entry port to maintain a perfectly tight environmental seal around incoming instrumentation wires.
Applications
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Tall Furnace Stacks and Vertical Kiln Chambers Continuous thermal profiling of exhaust gasses, high-heat flues, and internal processing zones inside commercial furnaces and kilns.
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Deep Reactor Vessels and Process Columns Deep-immersion temperature measurement inside large-scale chemical reactors, blending columns, and massive fluid processing vats.
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High-Risk Hazardous-Area Zones Safe installation across highly volatile plant zones that demand long probe reach combined with strict flameproof containment certificates.
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Oil and Gas Refinery Processing Towers Precision temperature tracking within fractional distillation columns, cracking units, and extended hydrocarbon transport infrastructure.
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Cement, Steel, and Heavy Industries Industrial-grade thermal monitoring inside severe, high-heat raw material processing ovens and heavy metallurgical furnaces.
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Classified-Zone Inaccessible Locations Drop-in instrumentation replacement for legacy processing equipment where standard-length sensors cannot safely reach the core thermal stream.
Datasheet
FAQs
1. What is the Flameproof RTD Sensor Standard Assembly used for?
The Flameproof RTD Sensor Standard Assembly is an explosion-proof PT100 Resistance Temperature Detector (RTD) designed for accurate temperature measurement at deep or hard-to-reach locations within classified hazardous areas. Aavad’s Model APFS-6×2800 features a 2800 mm long SS316 probe, making it ideal for furnaces, kilns, deep reactors, process columns, and other industrial equipment where standard-length RTDs cannot reach.
2. What accuracy and temperature range does this Flameproof RTD Sensor offer?
This sensor uses a Simplex 3-wire PT100 Class A sensing element with an operating temperature range of -50°C to +400°C. Its 6 mm OD SS316 stainless steel sheath with compacted Magnesium Oxide (MgO) insulation provides excellent measurement accuracy, thermal stability, and reliable performance under repeated thermal cycling.
3. What hazardous gas group certifications apply to this Sensor?
The flameproof enclosure is available for Gas Groups I, IIA, and IIB, subject to the applicable product certification and hazardous-area site classification requirements. It is suitable for use in oil & gas, chemical, petrochemical, and other classified industrial environments.
4. Can the insertion depth be adjusted during installation?
Yes. The sensor is supplied with an adjustable 1/2″ BSP (Male) compression fitting, allowing installers to set the required probe insertion depth during installation to match the equipment, pipeline, vessel, or process geometry without requiring a fixed installation length.
5. What industries typically use this Long-Length Flameproof RTD Sensor?
Long-Length Flameproof RTD Sensors are widely used in oil & gas processing, chemical and petrochemical plants, furnaces, kilns, cement plants, steel manufacturing, reactors, process columns, and other hazardous industrial applications requiring extended-reach PT100 temperature measurement in classified hazardous locations.
