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Tel : +86-592-6382791
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Email : sales@pidmaxwell.com
Tel : +86-592-6382791
Email : sales@pidmaxwell.com
The TC-K4/TC-J4 series is a high-performance, versatile probe-type thermocouple temperature sensor designed for a wide range of industrial, scientific, and process-control applications. The sensor consists of a stainless-steel protective sheath enclosing a precision thermocouple element, terminated with a braided-shield extension lead wire and fork-type (spade) terminal connectors. Four thermocouple calibration types — K, J, T, and E — are available to cover measurement ranges from cryogenic temperatures down to -200 °C up to +1260 °C, accommodating virtually every industrial temperature-measurement requirement.
The probe sheath is manufactured from 304 stainless steel, offering excellent corrosion resistance and mechanical durability. The extension lead wire is protected by a metallic braided shield (aluminium foil + tinned-copper braid) that effectively suppresses electromagnetic interference and ensures signal integrity over long cable runs. Both probe diameter and insertion length are fully customisable, and the lead wire length can be specified to any required dimension. An optional waterproof (IP67) sealed construction is available for use in wet or immersion environments. All products comply with IEC 60584 international standards.
Brand:
PIDMaxWellItem no.:
TC- K4/J4Payment:
T.T, Credit Card, Paypal etc, to be negotiateMarket price:
$15Price:
$10Product origin:
Made in ChinaColor:
Silver, whiteMin order:
10 PCSProduct weight:
0.05kgLead Time:
14 days after payment confirmedKey Features
High-Precision NTC Element: 10 kΩ nominal resistance at 25 °C with ±1% tolerance; B-value 3950 K ±1% ensures accurate and repeatable temperature readings across the full operating range.
Compact M8 Stainless Steel Probe: 4 mm probe diameter and 19 mm probe length enable installation in confined spaces and tight-clearance equipment. The M8 × 1.25 thread (11 mm thread length) is compatible with standard M8 threaded bosses.
High-Temperature Silicone Gasket: An integrated silicone gasket under the hex nut provides a reliable, leak-proof seal when torqued into a threaded port, preventing fluid or gas ingress around the fitting.
Short 150 mm Flat Silicone Lead Wire: The 150 mm flat silicone lead wire is rated for continuous operation up to 200 °C, making it suitable for use in high-ambient-temperature environments such as engine bays and industrial ovens.
2-Pin SMP Connector: The sensor terminates in a standard 2-pin SMP (Micro-Fit compatible) connector, enabling fast, tool-free connection and disconnection without soldering. Ideal for OEM assembly lines and field service applications.
Wide Operating Temperature Range: The sensor operates reliably from −40 °C to +125 °C, covering the majority of industrial, HVAC, automotive, and consumer appliance temperature measurement requirements.
Waterproof and Corrosion-Resistant Construction: The 304 stainless steel probe body and hex nut provide excellent corrosion resistance in wet, humid, and mildly corrosive environments. The epoxy-sealed probe tip prevents moisture ingress to the sensing element.
Technical Specifications
Electrical Characteristics
| Parameter | Value | Remarks |
| Sensor Type | NTC (Negative Temperature Coefficient) Thermistor | — |
| Nominal Resistance at 25 °C (R25) | 10 kΩ | Measured at zero-power condition |
| Resistance Tolerance (R25) | ±1% | Factory calibrated |
| B-Value (B25/100) | 3950 K | Steinhart-Hart coefficient |
| B-Value Tolerance | ±1% | — |
| Operating Temperature Range | −40 °C to +125 °C | Continuous operation |
| Dissipation Factor (in still air) | ≥ 3 mW/°C | Self-heating reference |
| Thermal Time Constant (in water) | ≤ 25 seconds | Response to 63.2% of step change |
| Insulation Resistance | ≥ 100 MΩ at 500 VDC | Between leads and probe body |
| Dielectric Withstand Voltage | 1,200 VAC, 2 mA, 3 s | No breakdown |
| Maximum Power Dissipation | ≤ 1 mW (recommended) | To minimise self-heating error |
Mechanical Dimension
| Dimension / Component | Specification | Material |
| Probe Outer Diameter | 4 mm | 304 Stainless Steel |
| Probe Length (below hex nut) | 19 mm | 304 Stainless Steel |
| Thread Type | M8 × 1.25 (metric coarse) | 304 Stainless Steel |
| Thread Length | 11 mm | — |
| Hex Nut Across Flats | 13 mm (S13) | 304 Stainless Steel |
| Sealing Gasket | High-temperature silicone, included | Silicone rubber |
| Lead Wire Length | 150 mm (15 cm) | Flat silicone jacket |
| Lead Wire Gauge | 26 AWG (0.13 mm²) | Tinned copper conductor |
| Lead Wire Insulation Rating | 200 °C continuous | Silicone rubber |
| Connector Type | 2-pin SMP (Micro-Fit compatible) | Black PA66 housing |
| Overall Sensor Length (probe tip to connector) | ≈ 185 mm | — |
Resistance–Temperature Reference Table
The following table provides representative resistance values for the NTC10K sensor at selected temperatures, calculated using the Steinhart-Hart B-parameter equation with R25 = 10 kΩ and B25/100 = 3950 K. These values are provided as a reference for circuit design and calibration purposes.
| Temperature (°C) | Resistance (kΩ) | Resistance (Ω) |
| -40 | 329.5 | 329,500 |
| -20 | 98.0 | 98,000 |
| -10 | 57.0 | 57,000 |
| 0 | 34.0 | 34,000 |
| 10 | 20.9 | 20,900 |
| 20 | 12.9 | 12,900 |
| 25 | 10.0 | 10,000 |
| 30 | 7.9 | 7,900 |
| 40 | 5.0 | 5,000 |
| 50 | 3.3 | 3,300 |
| 60 | 2.2 | 2,200 |
| 70 | 1.5 | 1,500 |
| 80 | 1.05 | 1,050 |
| 100 | 0.55 | 550 |
| 125 | 0.26 | 260 |
Environmental and Reliability Specifications
| Test Item | Test Condition | Acceptance Criterion |
| Low-Temperature Storage | −40 °C, 1,000 hours (IEC 60068-2-1) | ΔR25/R25 ≤ 3%; no visible damage |
| High-Temperature Storage | +125 °C, 1,000 hours (IEC 60068-2-2) | ΔR25/R25 ≤ 3%; no visible damage |
| Damp Heat (Steady State) | 40 °C / 90–95% RH, 1,000 hours (IEC 60068-2-3) | ΔR25/R25 ≤ 3%; no visible damage |
| Thermal Shock | −40 °C ↔ +125 °C, 5 cycles (IEC 60068-2-14) | ΔR25/R25 ≤ 3%; no visible damage |
| Lead Wire Pull Strength | 9.8 N (1 kgf) along wire axis, 1 minute | No wire separation or resin cracking |
| Drop Test | 1 m drop onto 10 mm oak board, 5 times | No visible damage |
| IP Rating | IP67 (probe and fitting, when installed with gasket) | No water ingress at 1 m depth, 30 min |
Why Choose Maxwell?
Maxwell Automation (Xiamen) Limited is a leading manufacturer and exporter of industrial automation and temperature measurement products, headquartered in Xiamen, Fujian Province, China. The NTC10K series is manufactured under strict quality control procedures, with 100% resistance testing at 25 °C and batch B-value verification to ensure consistent performance across production lots.
OEM/ODM Customisation: Custom probe dimensions, thread types, wire lengths, connector types, and private-label packaging are available for volume orders.
High-Volume Production Capacity: Monthly production capacity of over 100,000 units, with standard lead times of 10–15 working days for custom configurations.
100% Electrical Testing: Every sensor is tested for R25 resistance and continuity before shipment, with optional B-value verification available.
Competitive Factory Pricing: Direct factory pricing with no intermediary mark-up. Volume discounts available for orders above 1,000 units.
Global Logistics Support: Worldwide shipping via DHL, FedEx, UPS, and ocean freight. Samples available for evaluation before bulk order placement.
Contact Information
| Channel | Details |
| sales@pidmaxwell.com | |
| Tel / WhatsApp | +86 13779929138 |
| Phone (Office) | +86-592-6382791 |
| Website | www.maxwell-fa.com |
The NTC10K series uses a structured ordering code that encodes all key configuration parameters in a single alphanumeric string. The standard ordering code format is shown below:
NTC10K - [Resistance Code] - [B-Value] - [Tolerance] - [Thread] - [Wire Length] - [Connector]
Code Breakdown
| Position | Field | Code | Description |
| Product Series | Sensor family | NTC10K | NTC thermistor, 10 kΩ nominal at 25 °C |
| ① Resistance Code | Parallel resistance value | 100K | 100 kΩ parallel resistor (linearisation) |
| NONE | No parallel resistor (raw NTC output) | ||
| ② B-Value | Thermistor B-constant | 3950 | B25/100 = 3950 K (standard) |
| 3435 | B25/85 = 3435 K (alternative) | ||
| ③ Tolerance | R25 resistance tolerance | 1 | ±1% (standard, high precision) |
| 2 | ±2% (economy grade) | ||
| ④ Thread | Screw thread type | M8 | M8 × 1.25 metric coarse thread (standard) |
| M6 | M6 × 1.0 metric coarse thread (optional) | ||
| M10 | M10 × 1.5 metric coarse thread (optional) | ||
| ⑤ Wire Length | Lead wire length in cm | 15 | 150 mm (15 cm) — standard |
| 30 | 300 mm (30 cm) — optional | ||
| 50 | 500 mm (50 cm) — optional | ||
| XXX | Custom length in cm (on request) | ||
| ⑥ Connector | Output connector type | SMP | 2-pin SMP (Micro-Fit compatible) — standard |
| JST | 2-pin JST PH 2.0 connector (optional) | ||
| BARE | Bare wire ends, no connector (optional) | ||
| DUPONT | 2-pin Dupont 2.54 mm connector (optional) |
Standard Product Ordering Code
The following table lists the standard (off-the-shelf) product configurations available from stock. Custom configurations can be quoted upon request with a minimum order quantity.
| Ordering Code | Description | Stock Status |
| NTC10K-100K-3950-1-M8-15-SMP | Standard: 10K/100K, B3950, ±1%, M8 thread, 150 mm wire, SMP connector | Standard Stock |
| NTC10K-100K-3950-1-M8-30-SMP | 10K/100K, B3950, ±1%, M8 thread, 300 mm wire, SMP connector | Standard Stock |
| NTC10K-100K-3950-1-M8-15-BARE | 10K/100K, B3950, ±1%, M8 thread, 150 mm wire, bare wire ends | Standard Stock |
| NTC10K-100K-3950-1-M8-15-JST | 10K/100K, B3950, ±1%, M8 thread, 150 mm wire, JST PH2.0 connector | Made to Order |
| NTC10K-100K-3950-1-M6-15-SMP | 10K/100K, B3950, ±1%, M6 thread, 150 mm wire, SMP connector | Made to Order |
| NTC10K-NONE-3950-1-M8-15-SMP | Raw NTC only (no parallel resistor), B3950, ±1%, M8 thread, 150 mm, SMP | Made to Order |
NTC10K-100K-3950-1-M8-15-SMP
Potential Applications
The NTC10K series combines a compact form factor, high measurement accuracy, and a plug-and-play SMP connector to address a broad range of temperature sensing requirements across multiple industries. The following table provides a summary of the primary application sectors, recommended configurations, and key performance requirements for each.
| Application Sector | Typical Use Case | Key Requirement | Recommended Config. |
| HVAC & Heat Pumps | Refrigerant pipe temp, water inlet/outlet, ambient air sensing | Wide range, moisture resistance | M8, 150 mm, SMP |
| Water Heaters & Boilers | Tank water temperature, flue gas monitoring, anti-scald control | High-temp silicone wire, leak-proof seal | M8, 150 mm, SMP |
| Industrial Process Control | Pipe and vessel temperature monitoring, coolant loops | Corrosion resistance, IP67 | M8, 300 mm, BARE |
| Automotive & EV | Coolant temp, battery thermal management, oil temp sensing | Vibration resistance, wide temp range | M8, 150 mm, SMP |
| 3D Printing & Additive Mfg | Heated bed temperature, chamber monitoring | Compact probe, fast response | M8, 150 mm, SMP/JST |
| Food & Beverage Equipment | Cooking vessel temp, refrigeration, pasteurisation | Stainless steel, food-safe materials | M8, 150 mm, SMP |
| Solar Thermal Systems | Collector outlet temp, storage tank stratification | High-temp silicone wire, UV resistance | M8, 300–500 mm, BARE |
| Medical & Lab Equipment | Incubator temp, autoclave monitoring, water bath control | High accuracy, repeatability | M8, 150 mm, SMP |
| Consumer Appliances | Washing machine water temp, dishwasher, coffee machine | Compact, low cost, SMP for easy assembly | M8, 150 mm, SMP |
| Renewable Energy / Battery Storage | Battery pack temp monitoring, inverter thermal protection | Wide range −40 to +125 °C, fast response | M8, 150 mm, SMP |
Application Details
HVAC and Heat Pump Systems
In heating, ventilation, and air conditioning systems, NTC thermistors are the dominant sensing technology for measuring refrigerant pipe temperature, water inlet and outlet temperature, and ambient air temperature. The NTC10K sensor's M8 thread allows direct installation into the refrigerant circuit or water circuit pipework, while the high-temperature silicone gasket ensures a leak-proof seal. The 2-pin SMP connector is directly compatible with the majority of commercial HVAC control boards, enabling fast field replacement without soldering.
Water Heaters and Boilers
In domestic and commercial water heaters, storage tanks, and boiler systems, the NTC10K sensor provides precise water temperature feedback for thermostat control, anti-scald protection, and energy management functions. The M8 thread is the most widely used thread size for water heater temperature sensors in the Chinese and European markets. The silicone lead wire's 200 °C rating ensures reliable operation even in high-ambient-temperature boiler rooms.
Industrial Process Control
In industrial cooling loops, hydraulic systems, chemical dosing equipment, and process pipework, the NTC10K sensor provides continuous temperature monitoring for process control and alarm functions. The 304 stainless steel probe body resists corrosion from water, weak acids, and alkaline cleaning agents. For installations requiring longer lead wire runs to a remote controller or PLC, custom wire lengths of 300 mm, 500 mm, or longer are available on request.
Automotive and Electric Vehicle Applications
In automotive cooling systems, engine oil circuits, and electric vehicle battery thermal management systems, NTC thermistors are preferred over thermocouples due to their higher sensitivity in the −40 °C to +125 °C range, lower cost, and simpler signal conditioning requirements. The NTC10K sensor's M8 thread is compatible with standard automotive sensor bosses, and the SMP connector provides a secure, vibration-resistant electrical connection.
3D Printing and Additive Manufacturing
In FDM 3D printers, the NTC10K sensor is used to monitor the temperature of the heated print bed, ensuring accurate and uniform bed temperature for optimal first-layer adhesion. The M8 thread allows the sensor to be installed directly into a threaded boss on the bed frame or heater block. The SMP connector is compatible with many popular 3D printer control boards, and the JST PH2.0 connector variant is available for boards that use JST connectors as standard.
Food and Beverage Processing Equipment
In commercial cooking equipment, refrigeration systems, and food processing machinery, the NTC10K sensor provides accurate temperature measurement for process control and food safety compliance. The stainless steel probe body meets food-grade material requirements, and the silicone gasket provides a hygienic, leak-proof seal. The sensor is suitable for monitoring temperatures in cooking vessels, chilled water circuits, and cold storage systems.
Solar Thermal Systems
In flat-plate and evacuated-tube solar thermal collectors, NTC thermistors are used to measure the collector outlet temperature and storage tank temperature for differential temperature controller (DTC) operation. The NTC10K sensor's wide operating range (−40 °C to +125 °C) covers the full operating envelope of solar thermal systems, including stagnation temperatures. The silicone lead wire is resistant to UV radiation and elevated ambient temperatures in outdoor installations.
Medical and Laboratory Equipment
In laboratory water baths, incubators, autoclaves, and medical diagnostic equipment, the NTC10K sensor's ±1% resistance tolerance and stable B-value provide the measurement accuracy and repeatability required for scientific and medical applications. The compact M8 probe can be installed into standard fittings on laboratory glassware, reaction vessels, and temperature-controlled chambers.
Consumer Appliances
In washing machines, dishwashers, coffee machines, and other domestic appliances, NTC thermistors with SMP connectors are the standard temperature sensing component due to their low cost, compact size, and ease of automated assembly. The NTC10K sensor's standard SMP connector is compatible with the majority of appliance control boards, and the M8 thread provides a secure, leak-proof installation in the water circuit.
Battery Energy Storage Systems
In lithium-ion battery packs, battery management systems (BMS), and grid-scale energy storage systems, NTC thermistors are used for cell temperature monitoring, thermal runaway detection, and charge/discharge rate control. The NTC10K sensor's operating range of −40 °C to +125 °C covers the full thermal envelope of lithium-ion cells, and the SMP connector provides a reliable, low-resistance electrical connection in the battery management circuit.
TC-K1/J1/T1
Screw-in type thermocouple K,J,T,E
TT-501
Field mount temperature transmitter with local display
TC-K2,J2,T2,E2
Probe type thermocouple K,J,T,E with process fittings
TC-K6/J6
Spring loaded adjustable thermocouple type K/J
TC-K7/J7
Spring loaded non-adjustable bayonet sensor type K/J
TC-K8/J8
Ceramic sheath thermocouple with connection box
TC-K14/J14
Bare tip temperature sensor type K/J
NTC 10K
NTC 10K M8 Screw-Type Temperature Sensor
Address : NO.201 Binhuyili, HaiCang district, XiaMen,FuJian, China 361026
Max liao: +86 13779929138(whatsapp)
Email : sales@pidmaxwell.com
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