Web Menu

Product Search

Language

Share

Home / Product / Temperature sensor / Resistance temperature detector

View Products PDF Download
Categories
Contact Us

Industrial Resistance Temperature Detector Suppliers

About
Jiangsu Zhaolong Electrics Co., Ltd.

As China Industrial Resistance Temperature Detector Manufacturers and Resistance temperature detector Suppliers, Jiangsu Zhaolong Electrics Co., Ltd. is a regional high-tech enterprise and a production base of temperature sensors and temperature control instruments. We have jointly developed and produced a series of thermocouples (thermal resistances) and temperature control electronics with numerous R&D institutions and academies in Shanghai. These products are salable throughout the country and the world, offering an advantage in cost performance. Our products have a renowned reputation in the market and win customers' trust due to their excellent performance, attractive appearance, high reliability, advanced technology, and good cost performance.

With strong technical development team and patent results, we can undertake business for normal and special specifications, and can design & install various large-scale and small-scale automatic temperature control boxes and temperature control rooms and remote monitoring temperature control systems for customers.

Certificate Of Honor
  • CE Certificates
  • Certificates
  • ISO9001
  • ISO9001-cn
  • UDEM
  • Patent for invention
  • Patent for invention
  • Patent for invention
News
  • Cold Junction of a Thermocouple: Why It Really Matters and How CJC Works

    If you have ever compared two thermocouples on the same pipe and watched them disagree by a few degrees, the sensor tip probably was not the problem. More often, the answer sits at the other end of the loop, in the terminal block where the thermocouple wires meet the instrument. That connection point is the cold junct...

    READ MORE
  • Understanding Stainless Steel Emissivity: Values, Key Factors, and Measurement Guide

    If you have ever aimed an infrared thermometer at a stainless steel surface and received an unexpectedly low reading, emissivity is almost certainly the reason. Stainless steel is one of the most common materials in industrial plants, yet its emissivity ranges widely depending on how the surface is finished, how hot i...

    READ MORE
  • How Does a Resistance Temperature Detector Work? | RTD Explained Guide

    Resistance temperature detectors, or RTDs, are among the most reliable temperature sensors used in industrial automation. As a manufacturer that has designed and built temperature sensors and temperature control instruments for years, we often hear the same question from process engineers and maintenance teams: how do...

    READ MORE
Industry knowledge

At Jiangsu Zhaolong Electrics Co., Ltd., we are a Resistance temperature detector manufacturer operating from our factory in Dainan Town, Xinghua City, Jiangsu, China. Our RTD line covers Pt100, Pt1000 and NTC sensing elements in compact screw-mounted probes, magnetic-mount sensors, threaded process probes, waterproof insertion probes and food-grade versions. The range is engineered for chemical plants, natural gas facilities, petroleum refineries, power generation, mechanical equipment and ovens where stable, repeatable temperature data is required.

Since 200533,300 m² plant100+ employeesISO9001 / CE

RTD Manufacturing and Product Position

Zhaolong Electrics develops temperature sensors together with research institutions and academies in Shanghai, combining patented design work with full-process quality supervision. We manufacture RTDs and temperature control instruments on the same Jiangsu production campus, which gives engineering and procurement teams a single source for probes, transmitters, thermocouples and accessories. The Temperature sensor product group includes both assembled thermocouples and this RTD category, supported by in-house wire processing, element assembly, welding, encapsulation and calibration.

  • Regional high-tech enterprise and production base for temperature sensors and temperature control instruments.
  • Design and installation of automatic temperature control boxes, control rooms and remote monitoring temperature control systems.
  • Full production flow from wire cutting, cleaning and annealing to element assembly, welding, encapsulation and final testing.
  • Standard and special-specification manufacturing supported by a technical development team and patent results.

Offered RTD Range and Application Matching

The RTD category is organised around the mounting form and process interface, not just the sensing element. This table maps the probe families we currently list to their typical process fit.

Probe family Sensing element Typical process fit Key configuration
M6/M8 stainless steel screw-mounted compact sensor Pt100K Machine surfaces, motors, small ovens, mechanical equipment M6 or M8 thread, compact body, vibration-resistant cable exit
Magnetic Pt100K temperature sensor Pt100K Ferromagnetic surfaces: gearboxes, tanks, compressor bodies Strong magnetic base, cable output, removable mounting
WZP-035 Pt100 insertion probe Pt100 Chemical liquids, aqueous and corrosive environments 5 x 35mm probe, 1-20m cable, waterproof anti-corrosion construction
Class A threaded 316 RTD Pt100 Reactors, pipelines, skids, refinery and chemical processes -200 to 450°C, Class A, 316 stainless, 1/2 inch thread
Food-grade PT1000/PT100/NTC probe Pt1000 / Pt100 / NTC Meat, barbecue and oven temperature sensing Stainless steel food-grade probe, multiple element options
Immovable thread thermal resistance Pt100 Equipment surfaces and small ovens Fixed thread mounting, robust assembly

Process and Application Fit

RTDs are preferred when a process needs higher accuracy than a thermocouple can provide over a moderate temperature window. Our range is used most often between -200°C and 600°C, with the Class A threaded version specified for continuous duty from -200°C to 450°C.

  • Chemical processing: reactors, storage tanks and pipelines need corrosion-resistant sheaths, sealed cables and waterproof construction. The WZP-035 Pt100 probe with PTFE silver-plated lead wire and anti-corrosion build suits this environment.
  • Natural gas and petroleum refining: threaded Class A 316 RTD probes handle furnace, compressor, distillation column and heat exchanger duties across the stated temperature window.
  • Power, metallurgy and building materials: vibration-resistant compact and fixed-thread designs are used on equipment surfaces and small ovens.
  • Mechanical OEM: M6/M8 and magnetic-mount solutions attach directly to ferromagnetic surfaces without drilling or welding.
  • Food and appliance: food-grade PT1000/PT100/NTC probes support meat, barbecue and oven applications where stainless steel construction helps maintain hygiene.

Materials, Accuracy and Electrical Configuration

  • Platinum sensing elements encapsulated in glass, ceramic or metal and connected to insulated lead wires.
  • 316 stainless steel sheaths as the standard protective construction for corrosion resistance and mechanical strength.
  • Typical RTD accuracy of ±0.1°C to ±0.5°C compared with ±1°C to ±3°C for conventional thermocouples.
  • Pre-assembled and factory-calibrated probes reduce on-site wiring and setup errors.
  • Standardized 2-wire and 3-wire resistance outputs match the input cards used by most controllers, PLCs and DCS systems.

Explosion-Protected and Hazardous Area Options

Zhaolong Electrics holds national explosion-proof production qualification certificates for explosion-proof thermocouples and resistance temperature detectors, a qualification obtained in 2013. For classified process areas, send us the zone, gas or vapour group and temperature class with the enquiry so the RTD can be built with the appropriate terminal housing, cable entry and protection arrangement.

Controls and Automation Integration

Standardized resistance curves connect directly to control systems. For longer transmission distances, use our temperature transmitter to convert the resistance signal to 4-20mA, or choose a rail temperature transmitter inside the control cabinet. We can also supply RTDs as complete assemblies with a connection head, terminal block and armored cable for a fully wired installation.

Quality, Calibration and Documentation

Every RTD is tested before leaving the factory. Our laboratory includes low-temperature test tanks, high-temperature test furnaces and calibration equipment with 0.01°C resolution, covering -200°C to +2000°C and maintaining temperature control within ±0.1°C. We apply GB/T 19001-2016/ISO9001:2015 quality system management and hold CE certification, with national explosion-proof production qualifications covering explosion-proof RTDs. Calibration certificates can be included with the delivery documentation.

Information We Use to Configure Your Solution

Configuration inputs for a proposal

  • Temperature range and process media, including any chemical or abrasive content.
  • Accuracy class, element type and calibration point: Pt100, Pt1000 or NTC.
  • Output requirement: 2/3-wire resistance, 4-20mA or transmitter integration.
  • Process connection: thread size, flange, compression fitting, magnetic mount or screw mount.
  • Insertion depth, probe diameter, sheath length and cable length.
  • Sheath and wetted materials: 316 stainless or a specialized alloy for corrosion resistance.
  • Environment: vibration, moisture, washdown, hazardous area classification.
  • Existing control system or automation protocol for integration support.
  • Calibration certificate, drawings, samples, OEM marking or packaging requirements.

Installation, Maintenance and Project Support

The standard RTD leaves the factory as a pre-assembled, calibrated unit, so installation is reduced to mounting, wiring and commissioning. Our after-sales package covers a 12-month warranty for non-human damage, calibration service and spare parts supply. We also support OEM/ODM projects: send drawings, samples or the operating point and we will propose the probe geometry, element class, sheath material and optional transmitter configuration. Deliveries are normally arranged by sea from our Jiangsu factory, with air freight possible for urgent requirements.

Resistance Temperature Detector FAQs

Which RTD element and accuracy class should we specify?

For most process duties, Pt100 Class A covers -200°C to 450°C with high repeatability. Pt1000 is useful when lead resistance must be minimized over short sensor-to-instrument distances. NTC elements suit cost-sensitive appliance and food thermometers. We confirm the element, tolerance class and calibration point from your operating range and system input.

Can you build custom probe lengths, connections and mounting forms?

Yes. Custom production is a core part of our factory work. We develop regular and special specifications based on drawings or samples, including threaded, flanged, magnetic, screw-mount and food-grade assemblies.

Can the RTD be supplied for hazardous areas?

We obtained national explosion-proof production qualification certificates for explosion-proof thermocouples and RTDs in 2013. Include zone, gas group and temperature class in your enquiry so we can prepare a matched assembly and supporting documentation.

What output can we connect to our PLC or DCS?

Resistance output uses standard Pt100/Pt1000 curves and 2/3-wire connections. For a 4-20mA loop, we can integrate a temperature transmitter or recommend a rail transmitter in the cabinet.

How is quality confirmed and what warranty applies?

Every RTD is tested before delivery and calibration documents can be included. We provide a 12-month warranty for non-human damage, plus calibration service and spare parts supply to reduce long-term downtime.