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Welded Sheath Thermocouples & RTDs for Power Plant Piping, Water & Steam Temperature Measurement
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  • Welded Sheath Thermocouples & RTDs for Power Plant Piping, Water & Steam Temperature Measurement
  • Welded Sheath Thermocouples & RTDs for Power Plant Piping, Water & Steam Temperature Measurement

Welded Sheath Thermocouples & RTDs for Power Plant Piping, Water & Steam Temperature Measurement

These weld-in thermowell thermocouples and RTDs are equipped with solid-drilled thermowells that are welded to main equipment to achieve tight sealing. Developed for temperature measurement of steam and water in power plant piping, the sensors offer two structural designs and installation methods to accommodate different operating pressures, temperatures and flow velocities.
Featuring a separable thermowell structure and a spring-loaded positioning mechanism for sensing elements, the sensors are standardly fitted with an aluminum weatherproof thermocouple head, with various optional thermocouple head styles available for diverse application scenarios.
Key Features
1. Adopting mineral-insulated (MI) sheathed elements, the sensors boast excellent pressure resistance, superior vibration resistance, stable performance and extended service life.
2. The spring-loaded fit between the sensing element and thermowell tip effectively shortens thermal response time and further upgrades the overall vibration resistance of the sensor.
3. The large-capacity thermocouple head paired with an optimized wiring structure ensures simple, convenient and highly reliable on-site wiring connections.
4. The split design of the sensor body and thermowell allows fast replacement of sensing elements without system shutdown, ensuring continuous equipment operation.
5. The precision solid-drilled thermowell features uniform wall thickness at the measuring end. Free from welding stress and intergranular corrosion hazards, it delivers exceptional pressure and impact resistance, guaranteeing stable and reliable operation, long service life and safe operation of power generation units.
6. The integrally drawn high-temperature MI platinum RTD element with a withstand temperature of 650°C offers outstanding vibration resistance and high upper temperature limit, fully meeting the high-precision and high-reliability main steam temperature measurement requirements of large-scale power units.

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  • Technical Specifications
Technical Parameters—WRNR-13/WER-13/WZP-13 Series
1) Model Specifications
Model Output Type Measuring Range(℃) Accuracy Class Nominal Pressure(MPa) Flow Rate(m/s) Protection Tube Material
WRNR-13 Single K 0~600 Class I or II ≤29.4 ≤100 06Cr18Ni11Ti
WRNR2-13 Dual K
WRER-13 Single E
WRER2-13 Dual E
WZPR-13 Single Pt100 Class B
WZPR2-13 Dual Pt100

2)Standard Dimensions
Model Type  ThermowellSpecifications Exposed Length(mm) Junction Box Type Electrical Interface
Tapered Pat Size
(mm)		 Cylindrical Sleeve(mm) Total Sleeve
Length(mm)
WRNR-13/
WRNR2-13		 K     Ø38,Ø22 Ø32 150×50,
200×50,
200×100,
250×100,
250×150,
300×150		 180  Waterproof type Single:M20×1.5,cable  Ø10
Dual:M24×1.5,cable  Ø16
WRER-13/
WRER2-13		 E
WZPR-13/
WZPR2-13		 Pt100
Note: Exposed length varies based on insulation layer thickness; can be customized per customer requirements.
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About Us
Yueqing Huadong Instrument And Meter Factory
Huadong Instrument and Meter Factory was established in 1986 and is located at the south foot of Yandang Mountain, a famous national tourist scenic spot, beside National Highway 104, 60 kilometers away from Wenzhou Airport, 3 minutes from the railway station, with convenient transportation and communication.
After nearly 40 years of accumulation and development, with the joint efforts of all employees, our factory has become the only supplier for the development, production, and sales of industrial automation equipment in the national instrument industry, with an annual production capacity of 150 sets of tooling equipment in various industries, and the production of "HY" series gun drilling (deep drilling) machine, polishing machine, core exposing machine, cutting straightening machine, locking machine, and multi-function argon arc welding machine, filling several industry gaps and greatly improving the level of industry automation.
Our factory mainly produces various series and specifications of temperature sensors, armored thermocouple cables, hot runner mold electric heaters, armored heating cables, thermocouple compensation wires (copper coating), special equipment for the temperature instrument industry, and also provides a variety of temperature measuring elements, installation casings, and accessories.
Our factory has a strong team of technical experts and well-trained employees, with sophisticated production equipment, advanced technology, and complete testing equipment. All products are produced according to international standards, with stable and reliable performance. Our products are sold to large and medium-sized enterprises in more than 20 provinces and cities across the country, and are exported to Europe, the Middle East, and Southeast Asian countries, with a good corporate image and reputation.
During the past decades, we have based on "pioneering and innovative, pragmatic and passionate work", adhered to the "integrity and win-win" business philosophy, to challenge themselves and innovate, take the road of specialization, independent intellectual property rights, access to nearly 30 China invention patents, utility model patent certificate of nearly, and enjoy the CE, ISO19001: 2015 international quality management system certification.
Huadong upholds "The customer is supreme, quality first" and provides better products to the world and the industry, to improve our quality, to improve our services, and to develop with our customers and industry. Our target is to create a united, cooperative, mutually beneficial enterprise and establish a bright future!
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