Core Value
The Compact Short Thread Thermocouple Temperature Sensor is a specialized temperature measurement solution designed for confined spaces, shallow blind holes, and tight machinery enclosures where standard-length threaded probes cannot fit. Engineered for plastic injection molding die blocks, small extruder heads, 3D printing hot ends, and compact heat exchangers, this sensor features a short-profile hex thread body combined with a low-mass sensing tip. This compact design allows the sensor to sit flush against mounting surfaces or screw directly into shallow tapping holes, providing instant, highly responsive thermal feedback to your PID control loop.
Available in industry-standard Type J and Type K calibrations, the sensor probe is housed in a durable stainless steel sheath. The short threaded hex head provides a secure, leak-proof mechanical fit in tight ports, while the transition area is protected by a flexible strain relief spring or high-temperature insulation to withstand continuous mechanical cycling. BACKED BY EXTENSIVE SENSOR MANUFACTURING EXPERIENCE and UNDERGOES MULTIPLE RIGOROUS QUALITY CHECKS to guarantee thread precision, electrical signal integrity, and reliable performance under high-vibration conditions.
- ✓ Space-Saving Short Profile: Ultra-compact threaded body fits seamlessly into shallow mold pockets and restricted machinery zones where standard probes fail.
- ✓ Fast Thermal Response: Low-mass probe tip and direct metal-to-metal contact ensure rapid temperature tracking during fast heating cycles.
- ✓ Metric & Imperial Options: Available in popular short thread sizes including M4, M6, M8, and 1/4″-28 UNF to match existing equipment ports.
- ✓ Vibration-Resistant Build: Heavy-duty hex fittings and strain relief options prevent wire fatigue and sensor loosening during high-speed machinery operation.
- ✓ Corrosion-Resistant Sheath: Stainless steel outer casing withstands high operating temperatures and mechanical wear.
- ✓ Grounded & Ungrounded Choices: Select grounded tips for ultra-fast reaction times or ungrounded configurations to eliminate electrical noise.
- ✓ Reliable Quality: Engineered for consistent accuracy across demanding industrial thermal processing cycles.
- ✓ Quality Assured: UNDERGOES MULTIPLE RIGOROUS QUALITY CHECKS including millivolt output calibration, thread pitch verification, and electrical insulation tests.
Technical Specifications & Performance Data
| Parameter | Standard Value | Customizable Range | Notes |
| Sensor Element | Pt100 (RTD) | Pt1000, Cu50, Dual Pt100 | Pt100 standard for industrial process control |
| Accuracy Class | Class A ($pm 0.15°C$ at 0°C) | Class B, 1/3 DIN, 1/10 DIN | IEC 60751 standard |
| Temperature Range | -50°C to 400°C | -200°C up to +600°C | Dependent on internal element construction |
| Connection Head | Form B (Die-Cast Aluminum) | KNE, KNW, Stainless Steel | IP65 / IP67 weatherproof rating |
| Probe Sheath Material | 304 Stainless Steel | 316 SS, Inconel, PTFE coated | 316 SS recommended for chemical/food applications |
| Probe Diameter | Ø 6.0 mm / Ø 8.0 mm | Ø 3 mm to Ø 16 mm | Thicker probes handle higher flow velocities |
| Process Connection | 1/2″ NPT Fixed Thread | BSPP, BSPT, Metric, Flange | Adjustable compression fittings also available |
| Wiring Configuration | 3-Wire System | 2-Wire, 4-Wire System | 3-wire compensates for cable resistance |
| Output Options | Direct Resistance (Ohms) | 4-20mA / 0-10V / HART | Requires head-mounted transmitter |
| Cable Gland | M20 x 1.5 | 1/2″ NPT, PG16 | Seals the cable exit point against moisture |
Industrial Applications & Solutions
- Petrochemical & Refining: Monitoring temperatures inside pressurized pipelines and distillation columns where explosion-proof or weatherproof heads are mandatory.
- Food, Beverage & Dairy: Utilizing 316 SS sheaths with sanitary tri-clamp fittings for clean-in-place (CIP) processing vats and pasteurization lines.
- Water & Wastewater Treatment: Submerged tank monitoring where the IP67 connection head prevents moisture ingress from high humidity.
- Power Generation: Monitoring cooling water, lubricating oil, and bearing temperatures in large-scale turbines and generators.
- Industrial Furnaces & Ovens: Tracking lower-temperature zones and exhaust flues where high precision is required over standard thermocouples.
Connection Head Pt100 vs Standard Market Sensors
| Feature | Our Connection Head Pt100 | Standard Market Sensors | Your Advantage |
| Terminal Head Casting | Flawless Die-Cast Aluminum + Epoxy | Porous Castings / Flimsy Plastic | Prevents water ingress during factory washdowns, protecting the circuit. |
| Element Purity | Authentic Class A Platinum | Unverified Class B or Lower | Tighter temperature control, resulting in better product yield. |
| Vibration Resistance | Magnesium Oxide (MgO) Packed Stems | Hollow/Air-filled Stems | The RTD element won’t shatter due to heavy pipeline or pump vibration. |
| Thread Machining | CNC Machined Process Threads | Rough Cast/Stamped Threads | Ensures a perfect, leak-proof mechanical seal at high pressures. |
| Quality Assurance | MULTIPLE RIGOROUS QUALITY CHECKS | Basic Resistance Check Only | Plug-and-play reliability straight out of the box. |
Installation & Handling Guidelines
- Gland Sealing: After wiring the internal terminal block, ensure the cable gland nut is tightened securely around the exit cable. A loose gland is the most common cause of moisture ingress and sensor failure in connection head probes.
- Head Orientation & Routing: When integrating these probes into complex machinery, heated molds, or platens alongside high-density cartridge heaters, rotate the connection head so that the cable gland aligns with the back-exit wiring routing of the heaters. This prevents cables from protruding from the side, saving lateral space and avoiding mechanical crushing.
- Immersion Depth: To ensure the Pt100 element reads the true fluid temperature rather than the pipe wall temperature, the probe stem should be immersed into the process media by at least 10 times the probe’s diameter.
- Wiring the 3-Wire System: In a standard 3-wire Pt100, two wires will be the same color (e.g., two red, one white). Connect all three wires directly to the corresponding terminals on the PID controller or transmitter to allow the system to subtract the lead wire resistance.
- Transmitter Heat Limits: If using a built-in 4-20mA head transmitter, ensure the ambient temperature around the aluminum connection head does not exceed 85°C (185°F) to prevent damage to the internal electronics.
Customer Success Stories
Case 1:
Dairy Processing Facility (New Zealand)
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Application: Milk pasteurization holding tubes requiring strict sanitary compliance and washdown capability.
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Challenge: Existing plastic-head sensors were cracking during high-pressure hot water washdowns, leading to moisture shorting the RTD signals.
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Solution: Class A Pt100 Probes with IP67 Stainless Steel Connection Heads and sanitary tri-clamp process connections.
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Results: SENSOR FAILURES ELIMINATED. “The fully sealed metal heads easily withstand our daily CIP washdowns. The temperature accuracy is dead-on, ensuring our pasteurization logs always meet regulatory standards.”
Case 2:
Chemical Plant (Singapore)
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Application: Long-distance temperature monitoring on outdoor chemical storage tanks.
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Challenge: Signal voltage drop over 150-meter cable runs was causing the control room to read temperatures 3°C lower than actual tank conditions.
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Solution: Connection Head Pt100 Sensors fitted with internal 4-20mA temperature transmitters.
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Results: 100% SIGNAL ACCURACY RESTORED. “By converting the RTD resistance to a 4-20mA signal right inside the connection head, the cable length no longer affects the reading. The aluminum heads hold up perfectly to the tropical weather.”
Pricing & Procurement Options
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Standard Production: MOQ 5 pieces. BACKED BY 30+ YEARS MANUFACTURING EXPERIENCE ensuring exact resistance matching and dimensional repeatability across production lots. Tiered volume discounts available for 50+ unit orders.
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Lead Times: Standard Catalog Dimensions (Straight Rods OD 12–30 mm): In stock, 3-5 days. Custom Single/Double Spiral Shapes or Heavy Diameters (OD 35–54 mm): 7-10 days. Express air freight with protective wooden crating.
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Global Logistics: Encased in individual shock-absorbing foam tubes within reinforced wooden export crates to prevent transportation breakage.
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Sample Orders: Custom sample elements produced upon CAD drawing and electrical specification approval. Every shipment UNDERGOES MULTIPLE RIGOROUS QUALITY CHECKS prior to dispatch.
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
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- Warranty: 1-Year Comprehensive Warranty covering internal heating element and built-in sensor.
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Technical Support: Application engineers available for wattage distribution calculation, thermocouple calibration, and nozzle fitting assistance.
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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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