High accuracy 4-Wire Pt100 Sensor

I. Core Parameters

II. Product Features

Ultra-High Measurement Precision: Adopts 4-wire wiring method to effectively eliminate errors caused by lead resistance. Combined with Class A and Class AA accuracy levels, its data precision is far superior to sensors with ordinary wiring methods.

Sturdy and Durable Structure: Equipped with armored cable externally, which enhances the wear resistance and tensile strength of the cable under harsh working conditions, effectively preventing cable aging and breakage, and prolonging the service life.

Wide Environmental Adaptability: The protection tube is made of SUS304 and 316L stainless steel, featuring corrosion resistance and high temperature resistance, which can adapt to various industrial environments. The operating temperature covers -200℃ to 600℃, meeting temperature measurement needs from low temperature to medium-high temperature.

Flexible Customization: The outer diameter of the protection tube and product length can be specified on demand. The resistance wire type supports single-wire, double-wire and triple-wire customization. The installation method can be selected as no installation, threaded installation or flange installation according to on-site requirements.

Diversified Application Scenarios: Suitable for single-point temperature measurement of fluids or gases in pipelines and storage tanks. There is also an average temperature measurement type with sensing elements distributed along the entire length of the probe, which can be used for average air temperature detection in large pipelines.

Pt100 4 wire with armored cable,making the cable stronger and more flexible, enhances the anti-wear and tensile ability of the cable under harsh working conditions, and more effectively prevents the cable from aging and breaking.

III. Related Component Specifications

Wire Assembly:

Internal Wire: Made of polytetrafluoroethylene (PTFE), with excellent insulation and corrosion resistance.

External Cable: Armored cable, configured with two red wires and two white wires, equipped with heat shrink tube for protection to enhance the protective performance.

Protection Tube:

Material: SUS304 and 316L stainless steel, with corrosion resistance and high temperature resistance, suitable for complex industrial environments.

Outer Diameter: Multiple specifications available, including φ3mm, 4mm, 5mm, 6mm, 6.35mm and 8mm, meeting different installation space requirements.

Sensing Element:

Standard Type: Single-wire Pt100 element, with fast response and stable performance.

Customized Type: Double-wire and triple-wire resistance elements, which can be selected according to reliability requirements.

Installation Accessories:

Threaded Fittings: Adapt to different specifications of threaded interfaces, ensuring firm installation.

Flange Fittings: Suitable for high-pressure, large-diameter pipeline and other scenarios, with good sealing performance.

Non-installation Accessories: Direct insertion installation, suitable for simple working conditions.

IV. Application Scenarios

With high precision and high durability, 4-wire Pt100 sensors are widely used in various industrial scenarios that require strict temperature measurement precision, mainly including:

Automotive Industry: Engine temperature monitoring, battery thermal management system (serving enterprises such as BYD Auto).

Aerospace Field: Environmental temperature measurement of test chambers, temperature detection of key components of aviation equipment (serving units such as AVIC Industry and AECC).

Petrochemical Industry: Temperature monitoring of fluids in pipelines and storage tanks, and precise temperature measurement in corrosive environments.

Power Industry: Temperature control and monitoring of power plant boilers, steam turbines, transformers and other equipment.

Metallurgical and Building Materials Industry: Temperature detection of high-temperature equipment such as smelting furnaces and cement kilns, and temperature control in production processes.

Scientific Research and Education Institutions: High-precision temperature measurement experiments in laboratories of institutions such as Tsinghua University and National University of Defense Technology.

General Industrial Scenarios: Average air temperature measurement in large-diameter pipelines, temperature monitoring of various industrial fluids (liquids, gases).

V. Product Advantages

Leading Precision: The 4-wire wiring design fundamentally eliminates lead resistance errors. Combined with Class AA and Class A high-precision elements, it meets strict temperature measurement requirements.

Strong Protection: The double protection of armored cable and stainless steel protection tube improves wear resistance, tensile strength and anti-aging ability, adapting to harsh industrial working conditions.

Good Compatibility: Compatible with various PLCs, DCS and temperature controllers, no additional adaptation equipment is required, enabling convenient integration.

Reliable Quality: The manufacturer has multiple qualifications such as SIL 2 functional safety certification, explosion-proof certification and ISO 14001 environmental management system certification. The products undergo strict testing and have stable performance.

High Degree of Customization: The length, outer diameter of the protection tube, resistance wire type and installation method can all be customized to accurately match the needs of different scenarios.

VI. Frequently Asked Questions (FAQs)

What are the advantages of 4-wire Pt100 compared with 3-wire Pt100?

Answer: The 4-wire system completely eliminates the influence of lead resistance on measurement results through separate current circuits and voltage measurement circuits, achieving higher measurement precision. It is especially suitable for long-distance wiring or scenarios with extremely high precision requirements. The 3-wire system can only partially compensate for lead resistance errors, and its precision is slightly lower than that of the 4-wire system.

How to select the appropriate outer diameter of the protection tube?

Answer: For narrow installation spaces, small-diameter protection tubes of φ3mm and 4mm can be selected; for standard working conditions, φ5mm and 6mm specifications are recommended, which balance protection performance and response speed; for high-pressure and high-vibration scenarios, large-diameter protection tubes of φ6.35mm and 8mm are recommended for a more stable structure.

Is there a difference between the effective temperature measurement range and the operating temperature range of the sensor?

Answer: Yes, there is a difference. The operating temperature range (-200℃ to 600℃) refers to the temperature range where the sensor can work normally, while the effective temperature range refers to the temperature measurement range under the corresponding accuracy level (e.g., Class AA only meets the error requirement of ±(0.1 + 0.17%|t|)℃ within 0~150℃). Beyond the effective range, the precision will decrease, but the sensor can still work.

What is the function of the heat shrink tube of the armored cable?

Answer: The heat shrink tube is mainly used to protect the cable joints, enhance the insulation performance, prevent moisture, dust and other impurities from entering, and at the same time improve the tensile strength and wear resistance of the cable, prolonging the service life of the cable.

Is the product quality and after-sales service guaranteed?

Answer: Yes, they are guaranteed. The manufacturer has a sound quality management system and multiple authoritative certifications, and provides professional technical support. Product quality issues can be handled in accordance with relevant standards, and customized solutions can also be provided according to customer needs.

Manual Welding

Automatic Welding

Insulation Testing

Laser Marking

Warehouse Managing

Thermocouple Assemble

Vacuum Leak Detection

Surface Polishing

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