Stainless steel thermocouple Suppliers

What Our Stainless Steel Thermocouple Range Covers

Stainless steel thermocouples are assembled temperature sensors with a metal sheath or protection tube that protects the sensing element from mechanical impact, corrosion and high-temperature oxidation. We build the sensor as part of our assembled thermocouple family and configure it to match the process mounting point, electrical interface and service environment.

We also supply this category in fixed flange, movable flange and non-fixed forms with metal or ceramic protection tubes.

Application Fit and Material Selection

Stainless steel sheathed thermocouples are specified across chemical processing, petroleum and petrochemical plants, natural-gas transport, daily chemical production, power, metallurgy, building materials and food machinery. The stainless steel sheath provides the mechanical and corrosion protection; the junction type determines the temperature range and signal characteristic.

• Base-metal junctions (K, N, E, J) cover most plant processes up to the upper limits of each calibration. Type K is the most common for furnace and general high-temperature work.
• Noble-metal junctions (S, R, B) and tungsten-rhenium junctions are used above the practical base-metal range. We also supply tungsten-rhenium designs as a lower-cost alternative to platinum-rhodium for high-temperature measurement.
• PT100 / RTD elements are included in stainless steel probes where accuracy and stability at moderate temperatures are more important than maximum range.

For aggressive processes, we select the protection tube and junction together. Our thermocouple range has been applied to molten steel, copper, aluminium and zinc solutions, salt furnaces, and special environments in cement plants and power plants. If your medium is corrosive, abrasive or high temperature, we confirm the sheath alloy and connection-head protection before production.

Configuration Options and Automation Integration

• Mounting form: fixed flange, movable flange, non-fixed with metal protection tube, non-fixed with ceramic protection tube, or custom mounting based on your drawing.
• Connection head: standard, waterproof, or explosion-proof head depending on the area classification. We hold national explosion-proof production qualifications for thermocouples and RTDs.
• Electrical output: bare leads, thermocouple connector, terminal head, or a head-mounted temperature transmitter for 4-20 mA or digital loop output.
• Combined sensors: K-type + PT100 in one probe lets you feed two separate instruments or provide redundancy.
• Compensation and accessories: matching thermocouple connectors, heads, sleeves and thermocouple accessories can be ordered with the probe.

We make the sensor as part of a complete measurement loop. Our temperature sensor range connects naturally to temperature controllers, rail-mounted and intelligent transmitters, and the automatic control systems we assemble for customers. When you specify the existing PLC or controller interface, we can match the sensor termination and signal type to it.

Quality Control, Testing and Acceptance

Quality control runs from wire processing to final calibration. Thermocouple wire is cut and cleaned; high-purity platinum, nickel and copper elements are manufactured with precision methods; junctions are welded; the element is installed in a protective tube; and the complete assembly is treated for insulation or explosion protection where required.

Our laboratory is equipped with a low-temperature test tank, noble-metal high-temperature test furnace, platinum-rhodium high-temperature test furnace, oil-tank test furnace and base-metal test furnace. Calibration covers -200 to +2000 °C with resolution up to 0.01 °C and control stability at ±0.1 °C. Each batch is tested before shipment, and a calibration certificate can be included with the delivery.

• Quality system: GB/T 19001-2016 / ISO9001:2015, CE, and ISO14001 environmental management certification.
• Explosion-proof: national production qualification certificates obtained in 2013 for explosion-proof thermocouples and RTDs.
• Documentation: calibration certificate, standard specification, and factory test record.
• After-sales: 12-month warranty against non-human damage, professional calibration service, and spare parts supply.

Project Support, Installation and Logistics

We are a manufacturing factory, not only a component seller. Our team designs and installs automatic temperature-control boxes, temperature-control rooms and remote monitoring systems for industrial customers. For sensor-only projects, we still coordinate the connection head, protection tube, insertion length and output signal so the delivered assembly fits the mounting point without rework.

Multiple production lines and full-process quality supervision let us combine standard batch thermocouples with custom special-specification work. Shipment is usually arranged by sea from nearby ports; air freight can be used when urgent delivery is required. Trade terms, payment method and packaging are confirmed in the quotation.

Information We Use to Configure Your Solution

Send the working point rather than only the sensor name. We build the proposal from the following data:

• Process medium, maximum continuous temperature and short-term peak.
• Required junction type (K, N, E, J, S, R, B, W-Re) or PT100 element.
• Sheath outer diameter, insertion length, mounting form and process connection.
• Connection head, termination and required cable length.
• Environment: moisture, vibration, abrasive media, corrosive atmosphere, or hazardous-area classification.
• Existing loop: controller or PLC input, transmitter type, and required signal.
• Drawings or samples for OEM / special specification work.
• Quantity, packaging requirement, delivery target and target port.

Using these facts, we confirm the protection-tube material, junction calibration, head type, and test or calibration points for your order, then issue a complete configuration and quotation.

Stainless Steel Thermocouple FAQs

What is the difference between a stainless steel thermocouple and a PT100 in the same probe? A thermocouple uses two dissimilar metals to generate a voltage and covers very high process temperatures; a PT100 is a platinum resistance element with better stability and repeatability at low-to-moderate temperatures. Our K-type + PT100 probes provide both signals from one stainless steel assembly.

Can you supply fixed flange, movable flange and non-fixed mounting? Yes. Fixed flanges suit vessels and furnace walls where the probe position is permanent; movable flanges allow adjustment of insertion depth; non-fixed assemblies with metal or ceramic protection tubes are used for open tanks, ducts or direct immersion where the probe can be replaced easily.

What temperature range can these stainless steel thermocouples cover? Standard K-type stainless steel assemblies are commonly applied to industrial furnaces at 1200 °C-class temperatures. For higher duty, we use ceramic protection tubes and noble-metal or tungsten-rhenium junctions. The calibration range of our factory test equipment covers -200 to +2000 °C.

Do you provide calibration certificates? Yes. Every product undergoes comprehensive factory testing, and a calibration certificate can be supplied. We also offer professional calibration service for sensors already in service.

If we need a special insertion length or custom head, can you make it? Yes. Custom production is our core business; we manufacture normal and special specifications from drawings or samples. Provide the mounting dimension and process conditions, and we will configure the assembly and confirm the final drawing before production.

What after-sales support is included? Our sensors carry a 12-month warranty against non-human damage. We stock matching spare parts and can supply replacement sensors, connection heads, and accessories for fast maintenance.