Core Value

Accurate temperature measurement is the cornerstone of industrial automation and closed-loop PID thermal control. In harsh processing environments, exposed wire thermocouples or unshielded probe leads rapidly succumb to moisture ingress, chemical oxidation, and electromagnetic interference (EMI), causing measurement drift, controller cycling errors, and equipment overheating.

The Industrial Thermocouple PT100 RTD With Connection Head provides a robust, field-serviceable platform designed to isolate sensitive sensing elements from external mechanical and chemical stressors. Within the terminal head, heavy-duty ceramic terminal blocks or integrated 4–20mA / HART smart temperature transmitters convert microvolt signals into clean, noise-immune telemetry ready for direct PLC integration.

For high-pressure vessels and aggressive media, the sensing element is shielded inside a seamless mineral-insulated (MI) metal sheath or precision-machined solid-bar thermowell (SUS304, SUS316L, Inconel 600, or Hastelloy). The internal cavity is packed with ultra-pure compacted magnesium oxide powder, providing high dielectric insulation alongside near-instantaneous thermal conduction from the fluid to the sensor tip.

Process mounting configurations are fully adaptable to operational constraints. Standard taper threads (NPT/BSPT) and parallel threads (BSP/G) provide pressure-tight seals in piping systems, spring-loaded internal designs ensure positive bottoming contact inside thermowells to reduce response lag, and sanitary tri-clamp fittings meet strict hygienic requirements in food, beverage, and pharmaceutical facilities.

• ✓ High Accuracy & Long-Term Stability: Precision Class A thin-film or wire-wound PT100 elements (±0.15°C at 0°C) and Class 1 thermocouple alloys guarantee drift-free readings over years of continuous operation.
• ✓ Weatherproof & Explosion-Proof Enclosures: Cast aluminum connection heads rated to IP65/IP67, alongside certified explosion-proof (Ex d) ratings, safeguard wiring against dust, humidity, and explosive vapors.
• ✓ Flexible Process Integration: Threaded couplings (NPT, BSP), adjustable compression fittings, sanitary tri-clamp ferrules, or fixed flanges accommodate any vessel architecture.
• ✓ Integrated Transmitter Ready: Accommodates standard round ceramic terminal blocks or head-mounted 4–20mA, 0–10V, and HART field transmitters.
• ✓ Direct OEM Manufacturing: Fully customizable probe diameters (Φ3mm to Φ16mm+), insertion lengths, head styles, and thermowell metallurgy engineered directly by HT HEATER.

Technical Specifications & Performance Data

Industrial Applications & Solutions

HT Heater Advantage: Why Choose Our PT100 RTD Thermocouple?

Installation & Handling Guidelines

• Insertion Depth Rule of Thumb: For accurate, error-free readings, the probe tip must be immersed deep enough to eliminate ambient stem conduction error. Maintain a minimum immersion depth of at least 10 times the sheath outer diameter in liquids, and 15 times the diameter in gas/air flows.
• Thermowell Bottoming (Spring-Loaded Units): When installing into a thermowell, utilize a spring-loaded mounting adapter to ensure the probe tip is held firmly against the bottom of the well. An air gap between the sensor tip and the thermowell wall introduces severe thermal lag into PID control loops.
• Lead Wire Routing & Shielding: For standard RTD outputs, always use a 3-wire or 4-wire configuration to compensate for lead resistance across plant distances. Route sensor cables away from high-voltage motor feeds and VFD power lines, and ground the cable shield at one end only.
• Routine Calibration Schedules: Establish an annual calibration verification protocol using a certified dry-block calibrator or ice/boiling point reference bath to detect and compensate for minor metallurgical aging over extended high-temperature runs.

Customer Success Stories

Case 1:

Chemical Processing Plant (Germany)

• Application: Temperature monitoring in jacketed chemical reactors operating under cyclic pressure with mild acid vapor exposure.

• Challenge: Previous generic RTD sensors experienced frequent seal failures at the connection head, allowing acid fumes to corrode the internal terminal blocks and causing sudden signal loss during production cycles.

• Solution: Partnered with HT HEATER to deploy Industrial PT100 RTDs with Heavy-Duty Weatherproof Connection Heads and SUS316L stainless steel sheaths, equipped with integrated 4–20mA head-mounted transmitters.

• Results: ZERO TERMINAL FAILURES OVER 3 YEARS. The rugged IP67 sealed connection heads completely eliminated vapor ingress, while the integrated transmitters delivered clean, noise-free 4–20mA process variables to the central DCS, improving batch temperature control by ±0.3°C.

Case 2:

Commercial Brewery & Distilling Facility (United States)

• Application: Automated mash tun and hot liquor tank temperature loops requiring strict sanitary compliance.

• Challenge: The facility required highly responsive RTD sensors with sanitary tri-clamp fittings that could withstand aggressive daily Clean-in-Place (CIP) caustic washdowns without suffering moisture leakage into the wiring.

• Solution: HT Heater supplied custom sanitary PT100 RTD assemblies featuring precision 1.5″ tri-clamp ferrules, electro-polished 316L probes, and gasketed aluminum connection heads.

• Results: RAPID CIP RESPONSE & FLAWLESS HYGIENE. The sensors withstood repeated thermal shocks during hot chemical sanitization cycles without seal degradation. The fast thermal response allowed the head brewer to execute tight, automated mashing ramps, ensuring consistent product quality across batches.

Pricing & Procurement Options

• OEM Customization: Tailored shapes, custom cutout holes for pipe nozzles, specialized voltage/wattage configurations, and custom strap lengths.
• Lead Times: Custom samples: 3–5 working days. Bulk production orders: 8–12 working days upon technical drawing sign-off.
• Packaging & Shipping: Individually bagged with protective foam padding and packed into heavy-duty 5-ply export cartons to prevent bending or lead wire stress during international transit.
• Minimum Order Quantity (MOQ): Low MOQ starting at 5–10 units for custom dimensions; competitive volume pricing tiers for equipment manufacturers.

Global Certifications & Compliance

• CE Marking
  Fully compliant with European safety and environmental standards.
• LVD Compliance
  Low Voltage Directive tested for continuous thermal load safety.
• RoHS Compliant
  Constructed using environmentally safe, lead-controlled brass alloys.
• ISO 9001
  Certified quality control covering CNC machining, coil pressing, and electrical testing.

Quality Documentation: Certificate of Conformity (COC) and insulation resistance test reports included.

Comprehensive After-Sales Support

• • Warranty: 1-Year Comprehensive Warranty covering internal heating element and built-in sensor.

  • Technical Support: Application engineers available for wattage distribution calculation, thermocouple calibration, and nozzle fitting assistance.

  • Global Response Network: BACKED BY 30+ YEARS MANUFACTURING EXPERIENCE with technical inquiry feedback within 2 hours.

Ready to Optimize Your Injection Molding?

Next Steps:

• 📧 Request Custom Quote – Send your nozzle dimensions, wattage, voltage, and HT-CLW-450 drawing requirements.
• 🔧 Free Design Consultation – Work with our thermal engineers to optimize heat distribution and lead insulation.
• 📦 Order Test Samples – Evaluate thermal performance on your injection molding machine.
• 📞 Contact Hot Runner Experts – Response within 2 hours

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