Industrial Thermocouple Suppliers

Thermocouples for Industrial Process Control

Jiangsu Zhaolong Electrics Co., Ltd. is a Thermocouple manufacturer based in Jiangsu, China, focused on temperature sensors and temperature control instruments since 2005. We jointly develop thermocouples and temperature control electronics with R&D institutions in Shanghai, and our plant in Xinghua combines automated wire processing, precision welding and calibration testing under one roof.

Our thermocouple range covers assembled, sheathed, multipoint, surface and specialty high-temperature probes for chemical, petrochemical, natural gas, metallurgical, cement, power, food and mechanical engineering applications. Alongside standard products, we supply OEM/ODM designs and complete automatic temperature control systems with remote monitoring.

Thermocouple Range and Application Fit

The table below summarizes our main thermocouple families and where each design fits in a process.

Engineering and Manufacturing Value

We build thermocouples as a factory, not a trading desk. Incoming wires are cut, cleaned and annealed; high-purity platinum, nickel or copper elements are produced by laser cutting or precision machining; junctions are welded; elements are insulated, encapsulated and assembled into protective tubes. This vertical production control lets us handle standard specifications and special designs without dividing responsibility among multiple suppliers.

Specialty products in our program include thermocouples for molten steel, copper, aluminum and zinc solutions, salt furnaces, cement plants and power plants. Our new anti-oxidation tungsten-rhenium thermocouples provide high-temperature measurement at lower material cost and are used as a replacement for platinum-rhodium in selected ranges; some versions meet military standards.

Configuration Options for Project-Specific Probes

• Calibration types: Type K, S, R, B and other assemblies, depending on the working point.
• Measuring junction: grounded, ungrounded or exposed for fast response.
• Protection: stainless steel, high-temperature alloy, ceramic tube or sheathed construction.
• Geometry: diameter, immersion length, bend shape, tip profile and multipoint spacing.
• Mounting: thread, flange, bayonet, spring-loaded, screw-in or adhesive pad.
• Connection: connection head, terminal block, plugs, cable exit or direct lead wire.
• Output: bare mV, compensation wire, connector, or integrated temperature transmitter.
• Explosion-proof construction for classified hazardous areas.

Controls, Transmitters and System Integration

A thermocouple by itself is one part of the measurement loop. We also manufacture temperature transmitters, temperature controllers, compensation wire, connectors, heads and sleeves so the signal chain is matched from sensor to PLC, DCS or SCADA. Our temperature transmitters accept thermocouple or RTD input and convert it to a standardized signal for the control system.

For larger projects, our engineering team designs and installs automatic temperature control boxes, temperature control rooms and remote monitoring temperature control systems. We work from your line interface, setpoint logic and number of zones to deliver an integrated system rather than a loose collection of instruments.

Quality Assurance and Acceptance Testing

Quality supervision runs through wire processing, welding, assembly and final testing. Our laboratory is equipped with a noble metal high-temperature test furnace, low-temperature test tank, oil tank test furnace and base metal test furnace. Calibration resolution reaches 0.01°C over a -200°C to 2000°C range, with temperature control stability within ±0.1°C.

We hold GB/T 19001-2016/ISO9001:2015 and CE certification, and obtained national explosion-proof production qualification for thermocouples and RTDs in 2013. Products can be delivered with calibration certificates and the documentation required by your project acceptance procedure.

Installation, Maintenance and Service Support

Pre-assembled thermocouples simplify installation and reduce wiring errors. We confirm mounting dimensions and electrical connection before production, so the sensor arrives ready to install. For maintenance, we provide calibration services and a sufficient supply of spare parts to reduce unplanned downtime.

All products carry a 12-month warranty covering non-human damage. We arrange sea freight from nearby ports for routine orders and air freight when a faster delivery is needed.

Information We Use to Configure Your Solution

To prepare a configuration drawing and firm quotation, send us the following project data:

• Process medium, normal operating temperature, maximum temperature and thermal cycling.
• Required accuracy, response time and expected service life.
• Installation point, pipe or vessel wall thickness, immersion length and mounting thread or flange.
• Working pressure, vibration, mechanical load and chemical exposure.
• Hazardous area classification if explosion-proof construction is needed.
• Junction type, sheath material, diameter and bend geometry.
• Connection head, terminal type, cable length and output signal requirement.
• Number of measuring points and spacing for multipoint assemblies.
• Applicable standards, certificates or customer drawings and samples for OEM/ODM production.

Send these details with target quantity and delivery location. Our engineers will confirm the sensor construction, signal interface and acceptance documentation before we start production.

Thermocouple Procurement FAQs

Which thermocouple types can be supplied as OEM or ODM?

We build standard and special specifications from drawings or samples. The range includes assembled, sheathed, multipoint, surface, simple, soft, screw and pressure-spring thermocouples, plus Type K, S, R and B high-temperature constructions.

Do you provide explosion-proof thermocouples?

Yes. We obtained national explosion-proof production qualification for thermocouples and RTDs in 2013. Multipoint sheathed thermocouples are also available in explosion-proof versions for hazardous process areas.

What information is needed for a custom thermocouple quotation?

The essential data are working temperature, process medium, pressure, immersion length, mounting type, output signal and any required certificates. Drawings or samples speed up the development process and help us match your existing installation.

How do you ensure accuracy and long-term stability?

Every product is tested before shipment using our high-temperature test furnaces, low-temperature test tank and oil tank test furnace. Calibration resolution reaches 0.01°C, and we offer calibration guidance and service for continued accuracy in service.

Do you supply matching transmitters, controllers and accessories?

Yes. Our product line includes temperature transmitters, temperature controllers, thermocouple compensation wire, connectors, heads and sleeves, so the complete signal chain can be supplied from one factory.