In modern life, temperature is closely related to human production and daily activities. As an important physical quantity, it is one of the seven fundamental physical quantities in the International System of Units (SI) and is a crucial basic process parameter in industrial production. The application fields of the temperature instrument industry are constantly expanding. In addition to traditional industries such as chemical, petroleum, and steel, they are also widely used in renewable energy, nuclear power, and aerospace sectors. In these relevant fields, safety is vital for equipment operation, and temperature control is closely related to safety. For example, in the chemical industry, many chemical reactions are exothermic; if temperature cannot be effectively controlled, it may lead to uncontrolled reactions, resulting in high temperatures, high pressures, and other hazardous situations. Therefore, reasonably monitoring operating temperatures to ensure safe operations must rely on professional temperature instruments to guarantee safe, efficient, and accurate production and operation.
Zhejiang Lunte has been professionally engaged in the temperature instrument industry for over 40 years, specializing in the design and manufacture of temperature sensors and nuclear measurement instruments. It is a leading enterprise in the domestic industry, having developed many high-end, precise, and advanced temperature measurement instruments, breaking the foreign monopoly in high-end temperature instruments.
In the industrial sector, the company’s research and development of linear dynamic surface thermocouples has broken the monopoly of a foreign brand, occupying over 70% of the domestic market in the past five years. Additionally, products such as high-pressure thermocouples for gasification furnaces, COT thermocouples, wear-resistant thermocouples, and multi-point thermocouples for hydrogen reactors are known for their stable quality and excellent performance, receiving wide application and recognition from major companies like Sinopec, PetroChina, CNOOC, Shenhua, Sinochem, and Baosteel.
In the nuclear power field, the company successfully developed the Hualong One 1E-level fast response thermometer, which has been successfully applied in the K-2/K-3 nuclear power project in Pakistan (the first set in China). It has undertaken two major national science and technology projects during the 13th Five-Year Plan. The technical challenges for the CAP1400 1E-level platinum resistance thermometer have been completed, and subsequent supply contracts for four nuclear power projects have been signed.
Regarding the reactor core instrument system, as a key device for monitoring the safe operation of the reactor, it is used for in-core temperature measurement and neutron flux distribution measurement. This important monitoring instrument system has long been subject to foreign technological monopoly and supply restrictions, representing a "bottleneck" issue for China's third-generation nuclear power autonomy. All 53 operational nuclear power units in China rely on foreign companies for their in-core instrument systems. The R&D team completed the localization task of the in-core instrument system over five years, and has the capability to realize localized replacements or upgrades for imported in-core instrument systems in China's passive nuclear power plants. This is significant for ensuring energy security and enhancing the international competitiveness of third-generation nuclear power. This project has also been selected by the National Energy Administration as a significant technological equipment project in the energy field, with equipment supply completed for the first unit of the Guohe No. 1 demonstration project.
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Related Products
Connectors
Pressure Gauge
Junction Box Selection
VAN STONE Thermowell
High Pressure Thermowell
Can choose NPTthread and weld,full penetration weld or integration forged.
Thermowell Series
Tantalum is expensive and can not be bulld-up welded with other stainless steel. So thermowell is separated from flange,which has a sealing face of tantalum.
Electronic temperature and pressure (differential pressure) switch
The electronic temperature and pressure switches use electronic circuits to replace the traditional mechanical structures of switches, avoiding inherent weaknesses such as value drift, large hysteresis, low setpoint accuracy, jamming, and oxidation failure of micro-switch contacts. The electronic temperature and pressure switches utilize high-precision electrical signal sensors as signal inputs and connect to DCS/PLC systems via a two-wire system, eliminating the need for additional power supply to achieve switch functionality. The electronic switches feature a digital display and input keys, enabling visual monitoring and custom configuration of switch parameters.
Temperature Transmitter
LT series temperature transmiter adopts HART bussing technique, which is a new generation of intelligent temperaturemodule and an indispensable field device in process control. The device integrates a weath offunctional modules, whichcan realize both general function detection and complex control stratecies. Wsing digital technology, it can be applied toa variety of RTD and thermocouple sensors. The interface between the field and the control room is simple, and the cosof installation, operation and maintenance can be greatly reduced.
High Pressure Muitipoint Thermocouple For GSP Gasifier
BOO Multipoint Thermocouple
A multi-point flexible thermocouple suitable for temperature measurement in butanediol (BDOsynthesis reactors, with a maximum operating pressure rating of 2500 # (design pressure of 34.8MPaand design temperature of 204 '℃), and equipped with a pressure instrument for leakage detection.
Tsinghua Furnace Multipoint Thermocouple
It is used in coal-water slurry water-cooled wall gasifier (Tsinghua furnace, Jinhua furnace, Luxi furnace, etc.); There are 3 temperature sensors, two K-type and one B-type, the K type is used to measure the temperature of the annular cavity and the water wall temperature, and the B type is used to measure the temperature of the furnace combustion chamber, and the double-layer anti-leakage and detachable structure are set.
Multipoint Thermocouple for Ethylene Glycol Reactor
Our company has a variety of multi-point thermocouples suitable for ethylene glycol reactors. According to the process requirements, it can be divided into: single branch multi-point, multi-branch multi-point; Fixed, core-pullable, leak-proof and so on.
T-beam Multi-pointThermocouple
It is suitable for temperature measurement inside various reactors, especially hydrogenation reactors, with multiple independent casings fixed with T-beam brackets to prevent casing from bending, and equipped with sealing chambers and leakage detection pressure gauges.
Multipoint Injection Thermocouple
Cross Thermocouple
The cross-shaped temperature measurement thermocouple is a product developed by our company for measuring the temperature at the top of the blast furnace. Four sets of thermocouples are arranged in a cross layout, allowing for maintenance and replacement of thermocouples without shutting down the furnace. The thermocouple is held firmly against the inner wall of the casing by a spring, ensuring more accurate temperature measurement and more sensitive response.
High Pressure Multipoint Flexible Thermocouple
The thermocouple is flexible and can be bent. The product uses three different sealing methods and a four-layer leak-proof structure, with a double-layer independent sealing chamber. It is also equipped with a pressure gauge or pressure sensor for monitoring.
Multipoint Thermocouple for Shell Gasifier
The multipoint thermocouple is sealed with high-pressure sealing filler and metal compression fittings. A protective cover is installed beneath the flange surface to prevent the accumulation of dust at the flange root of the mounting tube from causing hydrogen embrittlement and corrosion of the thermocouple.
Multipoint Average Thermometer
insertion depth can be adjusted ±250mm. The casing is a stainless steel bellows with a pressure resistance of 1MPa. The head is equipped with a fastening block for attaching to the hammer.
Single Multi Point Thermocouple
The single multi-point thermocouple produced by our company is a plurality of thermocouples in an armored tube, which is made by pulling the armor directly through the porous magnesium oxide column through multiple coupling wires, which has the advantages of flexibility, voltage resistance, leakage prevention, etc., and the thermocouple is a flexible structure.
Storage Tank Multipoint RTD
RTD is flexible and bendable; The length of a single stick can reach up to 150m; With special mounting components, the thermal resistance in the interlayer in the storage tank, the inner and outer tank walls, the purge pipe, the bottom of the inner tank and other positions can be effectively installed and fixed
Wall Mounted Multipoint Thermocouple and RTD
With special installation components, the RTD in the interlayer. inner andouter tank walls, purge pipe, and inner tank bottom can be effectivelyinstalled and fixed.With special installation components, the RTD in the interlayer. inner andouter tank walls, purge pipe, and inner tank bottom can be effectivelyinstalled and fixed.
Enhanced Abrasion Resistant Thermocoule and RTD
Bilayer Anti-scour Thermocouple
COT Thermocouple with conirast Thermocouple Cores
Our company's patented product features a COT thermocouple with a comparison thermocouple core, At themeasurement end, there is an R-type thermocouple with a short-term temperature measurement and an armored coreleakage, as well as a K-tye thermocouple with a long-tem temperature measurement, The R-tvpe thermocouple cardirectly contact the medium for temperature measurement and can measure temperatures with higher accuracy. Thistemperature data can be used as the actual temperature of the medium, and the temperature diference between theR-type thermocouple and the K-type thermocouple can be compared, By comparing the difference and adding thetemperature value of the K-type thermocouple, it is the actual temperature.
Corundum Composition type Anti-erosion Temperature Sencor
Refining Riser Thermocouple
It is suitable for the temperature measurement of the catalytic riser of oil refining, and the casing has a prismatic structure, which can effectively resist the erosion of high-speed flowing catalyst particles contained in the medium.
COT Thermocouple
COT thermocouple is mainly used to measure temperature of ethylene cracking furnace outlet. Beginningin 1998, our company has been committed to the research of COT thermocouple. Based on differentfurnaces and the users' different reguirements, we have desianed a variety of different structures of theCOT thermocouple, which replaced the imported products and are widely used in the major ethyleneprojects. Our products have characters of small measurement error and long service life, so they arewidely used, and make us one of the largest manufacturer of COT thermocouple.
Abrasion Resistant Thermocouple and RTD
it is aoplicable to refinery catalvticcracking unit, circulating fluidized bed, fluidized bed furnace, coal mil., cement plant, and other placeswhich contains solid granular media.
Linear Dynamic Surface Thermocouple
Linear dynamic surface thermocouples (temperature measuring cables or thermal cables) are used for temperature measurement and early warning on the surface of coal-water slurry gasifiers.
COT Surface Thermocouple
Magnetic Surtace Temperature Sensor
Blade Thermocouple
The sheath covered with refractory fibers, the reinforced blade thermocouple is more anti-corrosive and has a longer lifetime
Surface Thermocouple and RTD
Pipeline Surface RTD
Hoop Thermocouple and RTD
Hoop thermocouple or RTD is applicable to measure temperature of pipel ine outer surface.
Surface Thermocouple and RTD
Surface thermocouple or RTD is applicable to surface temperature measurement of pipes, reactors and furnaces, with different forms of measuring end and fixed modes based on diferent equipments andenvironments, such as blade-type, wafer, hold hoop, clamp-on etc.
Flange Movable Thermocouple and RTD
Assembly Thermocouple
Flexible thermocouple
Sheath of flexible thermocouple is drawn by special stainless steel in special process, so it is muchsofter thantraditional ones, but the performance is same, despite of flexibility. Flexible thermocouple can be inserted intozigzag thermowell and measure temperature of various structure inner the reactor.
Spring Loaded Thermocouple and RTD
The spring structure makes measuring end of spring loaded thermocouple or RTD adiustable. The adjustablerange of insertion length is about 15mm. Measuring end sticks to top of thermowell, making measurement fastand accurate. Spring loaded thermocouple or RTD is applicable to all kinds of thermowell.
Compression Fitting Thermocouple and RTD
Flange Fixed Thermocouple and RTD
Wireless Temperature Measurement System
It is suitable for temperature measurement of rotary kiln and other equipment, and the wireless temperature measurement system can transmit the temperature measurement signal remotely and wirelessly, and the wireless receiver has a display function.
Thermometers for small diameter pipeline
It is used for direct measurement of various medium and high pressure small diameter (DN15~DN150) pipes.
UHV Thermocouple
It is suitable for temperature measurement and control in ultra-high pressure places in the production process of petroleum and chemical industry, especially in high-pressure polyethylene production equipment. The product is welded and sealed with double-layer packing, which can be used under 300MPa working condition for a long time.
Gasifier Furnace Tile Board Thermocouple
Flare Thermocouple
Sectional connection can be used, the high temperature section uses a metal armor layer, and the non-hightemperature section can use high temperature compensation wire excess.
Fast Response Thermocouple
polypropylene (PP) plant reactor; It has a double-layer leak-proof structure; The measuring end is in direct contact with the medium, with fast response and high precision; The thermal response time is τ0.5<3s.
Fast Response RTD
Chemical Fiber Purpose RTD
Thermowell of chemical fiber purpose RTD has a shrink structure. lt is thin in measuring end, so the sensortouches media wel, making measurement fast-response and accurate. Chemical fiber purpose RTD matchesthe requirement of low pressure and high accuracy in chemical fiber industry.
Shockproof RTD
RTD Inside of measuring end Special cling structure (patented technology), it is applicable to occasion ofintense vibration.
Thermocouple and RTD with Scale
With scale on the thermowell, thermocouple or RTD is applicable to the occasion of low tightness.Insertion length is adjustable by movable compression thread.
Bearing RTD
Right- angle Thermocouple
Right-angle thermocouple is applicable to high temperature production field. On occasions that gasesdo harm to connection head or thermocouple can not be installed horizontally or vertically, right-anglethermocouple is also suitable. Process connection: movable flange or movable compression thread.
Indoor Thermometer
Indoor thermometer is applicable to cold storage, oasthouse, thermostatic chamber, air-conditioned roomcommunications room, warehouse and other indoor or outdoor room which needs to control measurementIt measures accurately and is easy to install.
Anti-corrosion Thermocouple and RTD
The casing or component of the corrosion-resistant thermocouple (resistance) is wrapped in polytetrafluoroethylene, known as the "king of plastics." It is resistant to the corrosion of most acids, alkalis, and organic substances. With a temperature measurement range of <200°C, it can replace expensive metal protective tubes such as high-nickel alloys, titanium, and tantalum. It has advantages such as low cost and ease of processing.
Other Products
Thermocouple for Furnace Regenerator Crown
Thermocouple for Furnace Regenerator Crown
Used for temperature measurement at the top of coke oven regenerators, with a thermocouple insertion depth of nearly 2 meters. It features a reinforced square box and support ribs to prevent deformation when installed horizontally in high-temperature environments. The adjustable insertion depth is facilitated by a movable flange connection.
High Temperature Fumace Thermocouple
High Temperature Fumace Thermocouple
Thermocouple for Hot Blast Furnace
Thermocouple for Hot Blast Furnace
Thermocouple for Large Volumn Coke Oven
Thermocouple for Large Volumn Coke Oven
Used for measuring temperature in the carbonization chamber of large-volume coke ovens, equipped with three layers of high-temperature resistant sheaths and a movable flange. The sheath is designed with multiple ventilation holes to allow for hot air convection, offering quick response and high accuracy.
High Temperature Furnace Thermocouple
High Temperature Furnace Thermocouple
High Pressure Thermocouple For Coal Water Slurry Gasifier
High Pressure Thermocouple For Coal Water Slurry Gasifier
It is suitable for measuring coal-water slurry gasifier furnace.Flange connection with anti-leakage seals,which are made of US imported volcanic ash assemblies. Thermowell with adjustment screw, according tothe actual thickness of the furnace wall to adiust the insertion depth, the measurement part of the use olspecial metal thermowell.
Sulfur Recovery Gas Injection Thermocouple
Sulfur Recovery Gas Injection Thermocouple
Gas Injection Thermocouple
Gas Injection Thermocouple
Gas injection thermocouple is an indispensable thermocouple in ammonia plant, increasing servicelife by blowing nitrogen or instrument air to force harmful gas out of thermowell, or preventing entryof harmful media by making the inside thermowell pressure greater than the furnace pressure.
High Temperature Thermocouple
High Temperature Thermocouple
It is applicable to measure temperature of more than 1000'c, with the thermowell material of corundumor carborundum. High temperature thermocouple has type of S, R and B of noble metal. Commonly, ithas the structure of assemble.
Bimetal Thermometer
Bimetal Thermometer
The bimetallic thermometer is a field measurement instrument suitable for measuring medium and low temperatures, capable of directly measuring the temperature of gases, liquids, and steam. This thermometer is characterized by its low cost, easy installation, and the ability to read measurements on-site, making it a partial replacement for other types of measuring instruments. It is widely used in industries such as petroleum, chemical, steel, and power generation.
