Description
Industrial RTD Temperature Sensor (Model APID-6×450) is a robust duplex PT100 RTD sensor engineered for accurate and reliable industrial temperature measurement where two independent temperature signals are required from a single measurement point. Featuring two independent 3-wire PT100 sensing elements (3+3 wire) within a rugged 6 mm OD × 450 mm SS316 stainless steel sheath, this Class B RTD temperature sensor delivers stable temperature measurement across a wide -50°C to +400°C operating range. Its duplex RTD configuration enables one PT100 element to be used for process control while the second can independently support temperature indication, data logging, monitoring, alarm, or safety functions without requiring an additional process tapping point.
Designed for demanding process automation and industrial instrumentation applications, the Model APID-6×450 features compacted MgO insulation for measurement stability under repeated thermal cycling and a rugged IP67 die-cast aluminium terminal head for protection against dust, moisture, and challenging industrial environments. The corrosion-resistant SS316 sheath ensures long service life, while the dual 3-wire configuration provides reliable signal transmission to PLCs, DCS, SCADA systems, temperature controllers, transmitters, and data acquisition systems. Manufactured by Aavad Instrument, this industrial PT100 temperature sensor is an ideal solution for chemical, petrochemical, power generation, utilities, manufacturing, and process industries requiring redundant temperature monitoring or dual-signal temperature measurement from a single sensor installation.
Key features
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Dual Element Duplex Construction Features two fully independent 3-wire Pt100 platinum sensors embedded inside a single probe body to allow simultaneous dual-signal extraction.
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Streamlined Single Tapping Monitoring Enables simultaneous connection to a primary automated control loop and a separate backup indicator or logging system without adding extra process ports.
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Rugged IP67 Wash-Down Enclosure Upgraded die-cast aluminum connection head provides superior sealing against driving rain, high humidity, and direct low-pressure water jets.
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Compacted MgO Element Shielding High-purity compacted Magnesium Oxide insulation secures internal wiring to prevent physical failure during intense mechanical vibration or thermal cycling.
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Extended Reach SS316 Probe Sheath Marine-grade SS316 stainless steel body with a 6 mm outer diameter and 450 mm length allows deep process immersion into large tanks and pipelines.
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Broad Spectrum Thermal Tracking Provides stable and highly predictable temperature measurements across a demanding industrial operational range spanning from -50°C to 400°C.
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Simplified Field Conduit Wiring Designed with a single 1/2″ NPT cable entry port to clean up field junction wiring despite handling a dual-circuit 6-wire terminal footprint.
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Reliable Class B Calibration Accuracy Built to meet precise international Class B tolerance standards to deliver dependable long-term drift stability across high-temperature applications.
Applications
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Redundant Control and Safety Loops Ideal for mission-critical processes where one sensor signal runs active automation while the second acts as a dedicated safety interlock or trip switch.
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Simultaneous Data Logging and Indication Deployment in remote storage tanks or process reactors requiring continuous local digital readouts alongside centralized SCADA data recording.
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Chemical and Petrochemical Processing Infrastructure Monitoring highly corrosive fluid lines, distillation columns, and blending vessels where reducing the number of physical pipe penetrations is critical.
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Power Generation and Heavy Utilities Continuous tracking of critical thermal gradients in steam generation systems, cooling water loops, and heavy boiler exhaust networks.
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Hygienic and Wash-Down Process Zones Perfect for food processing, beverage bottling, and pharmaceutical packaging plants subjected to regular high-moisture equipment cleaning cycles.
Datasheet
FAQs
1. What is a 3-Wire Duplex Industrial RTD Temperature Sensor?
A 3-Wire Duplex Industrial RTD Temperature Sensor contains two fully independent PT100 sensing elements in a 3-wire + 3-wire configuration within a single probe, allowing two separate temperature signals from one measurement point. Aavad’s Model APID-6×450 features Class B accuracy, an operating range of -50°C to +400°C, and an SS316 stainless steel sheath measuring 6 mm OD × 450 mm.
2. Why use a Duplex RTD instead of two separate Single-Element Sensors?
A Duplex RTD Sensor allows one PT100 element to connect to the primary control system (PLC, DCS, or SCADA), while the second independently connects to a backup indicator, data logger, transmitter, or safety interlock. This eliminates the need for a second process tapping point, reducing installation costs, pipeline penetrations, and maintenance complexity.
3. What protection rating does this Industrial RTD Temperature Sensor have?
The sensor is equipped with a die-cast aluminum terminal head rated IP67, providing excellent protection against dust, humidity, moisture, and low-pressure water jets. This makes it suitable for wash-down areas, food and beverage processing, pharmaceutical manufacturing, and general industrial environments.
4. What signal systems can this Duplex RTD Sensor connect to?
The dual 3-wire configuration is designed for direct connection to PLCs, DCS systems, SCADA platforms, temperature controllers, RTD transmitters, indicators, and data acquisition systems. Both sensing circuits are routed through a single 1/2″ NPT cable entry for simplified installation.
5. Where is a 3-Wire Duplex RTD Temperature Sensor typically installed?
3-Wire Duplex RTD Temperature Sensors are widely used for redundant process control, safety interlocks, simultaneous monitoring and data logging, tanks, reactors, chemical and petrochemical plants, power generation, utility systems, and hygienic wash-down areas in food and pharmaceutical industries, where reliable dual temperature measurement is essential.
