Core Value
The Handheld Needle Penetration Type K Thermocouple Sensor is an essential portable temperature measurement tool engineered for rapid, non-destructive insertion into semi-solid and viscous materials. Designed for quality control, HACCP food safety compliance, rubber compounding, soil testing, and asphalt temperature monitoring, this sensor combines a razor-sharp stainless steel needle tip with a rugged, ergonomic handle for effortless penetration into dense media.
Utilizing industry-standard Type K calibration (Chromel-Alumel), the probe delivers exceptional thermal tracking across a broad temperature range of -50°C to +400°C. The ultra-thin needle tip ensures minimal insertion friction and minimal damage to samples while placing the sensitive thermocouple junction right at the core of the product. Connected via a heavy-duty PU coiled expansion cable with a standard miniature Type K plug, this sensor pairs seamlessly with all handheld digital thermometers and data loggers. BACKED BY EXTENSIVE SENSOR MANUFACTURING EXPERIENCE and UNDERGOES MULTIPLE RIGOROUS QUALITY CHECKS to guarantee needle tip sharpness, signal stability, and long-term mechanical durability under heavy daily use.
- ✓ Sharp Penetration Tip: Precision-ground stainless steel needle pierces frozen foods, meat, rubber compounds, and semi-solids effortlessly.
- ✓ Ergonomic Heavy-Duty Handle: Molded high-impact plastic or aluminum handle provides a comfortable, slip-resistant grip for high-force insertion.
- ✓ Ultra-Fast Response: Low thermal mass needle tip captures core temperature readings in seconds for rapid quality control checks.
- ✓ Flexible Coiled Cable: Expandable polyurethane (PU) curly cord stretches up to 1.5 meters without tangling or dragging across work surfaces.
- ✓ Universal Plug Compatibility: Fitted with a standard flat-pin miniature Type K connector, compatible with handheld meters from Fluke, Omega, Testo, and others.
- ✓ Food-Grade Construction: Made with food-safe 304/316 stainless steel probe shafts suitable for HACCP food processing standards.
- ✓ Reliable Quality: Built to withstand daily industrial drops, bending stress, and washdown environments.
- ✓ Quality Assured: UNDERGOES MULTIPLE RIGOROUS QUALITY CHECKS including millivolt calibration, needle tip integrity inspection, and strain relief pull testing.
Technical Specifications & Performance Data
| Parameter | Standard Value | Customizable Range | Notes |
| Sensor Calibration | Type K | Type J, PT100 (RTD), Type T | Type K standard for universal handheld meters |
| Temperature Range | -50°C to 400°C (-58°F to 752°F) | Up to 600°C for special builds | Governed by needle material and handle heat resistance |
| Needle Diameter (Ø) | Ø 3.0 mm / Ø 4.0 mm | Ø 1.5 mm to Ø 6.0 mm | Tapered sharp needle point |
| Needle Length | 100 mm / 150 mm / 200 mm | Custom lengths up to 500 mm | Select based on required insertion/core depth |
| Probe Sheath Material | 304 Stainless Steel | 316 Stainless Steel | 316 SS recommended for acidic foods & chemicals |
| Handle Material | High-Impact ABS / Nylon | Anodized Aluminum | Ergonomic shape designed for high hand pressure |
| Cable Type | Coiled PU Cable (Retractable) | Straight Teflon / SS Braided | Coiled cord stretches from 0.5m to 1.5m |
| Connector Type | Mini Type K Plug (Flat Pin) | Standard Male Plug / BNC | Universal match for handheld digital thermometers |
| Junction Type | Grounded (Fastest Response) | Ungrounded (Isolated) | Grounded junction delivers instant needle response |
| Accuracy Class | Class 1 ($\pm 1.5°C$) | Special Limits of Error | Conforms to IEC 60584 / ASTM E230 standards |
Industrial Applications & Solutions
- Food Processing & HACCP Control: Checking internal core temperatures of meat, poultry, cheese, dough, and frozen goods during production and storage.
- Rubber & Plastics Compounding: Measuring internal batch temperatures of rubber stock and molten polymer preforms prior to molding.
- Agriculture & Soil Science: Penetration testing into compost piles, soil beds, and grain silos to track decomposition and fermentation heat.
- Asphalt & Construction: Checking the core temperature of hot-mix asphalt before laying and rolling on roadbeds.
- HVAC & Insulation Testing: Piercing soft pipe insulation and duct liners to measure hidden surface or internal air temperatures.
HT-Heater vs Standard Market Sensors
| Feature | Our Handheld Needle Sensors | Standard Market Sensors | Your Advantage |
| Needle Tip Geometry | Precision Machine Ground | Rough Cut / Dull Tip | Requires 50% less force to penetrate dense materials, preventing bent probes. |
| Handle-to-Stem Weld | Reinforced Internal Mechanical Lock | Weak Glue / Light Epoxy | Handle won’t snap off or loosen when applying heavy downward pressure. |
| Cable Strain Relief | Molded Heavy-Duty Rubber Boot | Thin Heat-Shrink Tubing | Prevents wire breakage at both the handle and connector ends. |
| Coiled Cord Memory | High-Elasticity Polyurethane (PU) | Low-Grade PVC Cord | Cord retains its tight spring memory and won’t sag over time. |
| Quality Assurance | MULTIPLE RIGOROUS QUALITY CHECKS | Basic continuity test only | Reliable, plug-and-play accuracy out of the box. |
Installation & Handling Guidelines
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Proper Insertion Technique: Always apply pressure straight down along the axis of the needle handle. Avoid twisting or applying lateral (side) force while the needle is deeply embedded, as this can bend or snap thin probe tips.
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Core Depth Rule: Insert the needle tip at least 5 to 8 times the needle’s diameter into the product to ensure accurate core measurement without thermal conduction loss along the exposed stem.
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Cleaning & Sanitation: When used in food processing or agricultural testing, wipe the stainless steel stem clean with a food-safe disinfectant wipe between samples to prevent cross-contamination.
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Handle Temperature Limit: Do not submerge the handle or leave the sensor laying inside hot ovens. The handle and coiled cable are rated for ambient hand temperatures (-20°C to +80°C).
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Connector Care: Ensure the mini Type K plug pins remain clean and dry. Standard flat pins are polarized (wider positive pin); line up the polarity marks when plugging into your handheld meter.
Customer Success Stories
Case 1:
Commercial Meat Processing Plant (Australia)
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Application: Core temperature verification of frozen beef blocks during thawing and processing.
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Challenge: Standard needle probes were bending at the handle transition when operators pushed them into partially frozen blocks.
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Solution: Ø 4.0mm Heavy-Duty Handheld Needle Thermocouple Sensors with solid aluminum handles and reinforced needle transitions.
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Results: PROBE BREAKAGE REDUCED TO ZERO. “The reinforced needle-to-handle joint handles high downward force easily. The temperature reading stabilizes in less than 3 seconds.”
Case 2:
Tire & Rubber Products Factory (Thailand)
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Application: Quality control testing on raw rubber compound batches after Banbury mixing.
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Challenge: High-viscosity rubber was snapping delicate probes, and standard cords were cracking under high ambient factory heat.
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Solution: Type K Needle Sensors with Ø 3.0mm 316 SS ground tips and high-elasticity heat-resistant PU coiled cables.
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Results: EXCEPTIONAL DURABILITY. “These needle probes pierce the dense rubber stock smoothly without bending. The coiled cable keeps our inspection workstations neat and safe.”
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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