As the core precision component of heat metering systems, paired temperature sensors for heat meters directly determine the overall metering accuracy and long-term operational stability of heat meters. With years of expertise in temperature sensing, Duchin Instrument independently develops and mass-produces a full range of Pt1000 temperature sensors dedicated to heat meters, delivering high-matching and high-reliability temperature measurement solutions for global heating projects.
In-depth Engagement in Industry Standards with Authoritative Certifications
China's standardization of heat metering started with heating billing trials in 1996. A series of specifications have been released, including the industrial standard CJ128-2000 and its revised versions, as well as the national standard GB/T32224-2015 Heat Meters. Our company has participated in compiling the industrial standard Balanced Heat Meters, fully mastering the strict technical specifications universally adopted for heat metering worldwide. All our products fully comply with domestic and international testing codes for heat measurement.
Self-developed Production Line for Stable Supply, Outstanding Core Performance
In 2010, Duchin Instrument launched an exclusive fully automatic production line for heat meter temperature sensors, with an annual output capacity of 500,000 pairs to fulfill bulk orders from domestic and overseas markets. Each complete sensor consists of five core parts: temperature-sensing element, heat-conducting material, protective sleeve, mounting thread and lead wire, fitted with standard Class B Pt1000 elements:
Pairing calibration accuracy less than 0.06℃, with relative error between paired sensors below 0.1℃, enabling accurate detection of tiny temperature differences in heating pipelines;
Ultra-fast thermal response and long-term stable temperature measurement, suitable for continuous high-precision metering of hot and cold water networks;
Modular design with multiple options for thread types and probe lengths, covering all pipe sizes for household, building and community main heating pipelines.
Three Mature Models for All Heating Application Scenarios
WZZDS-3 Household Temperature Sensor Equipped with movable external thread M10×1 and fixed lead outlet, suitable for small household hot water pipes DN15/DN20/DN25. Standard optional probe lengths: 27.5mm, 85(105)mm, 120(140)mm, 210(230)mm. It can be directly inserted into pipelines for installation, serving as the standard temperature measuring component for household heat meters.
WZZDL-2 Building Main Pipe Temperature Sensor Adopts fixed G1/2 thread, supporting two wiring forms: terminal box or fixed lead wire. Designed for building unit main heating pipes DN32~DN250, ideal for centralized heat metering projects of residential buildings.
WZZPL-1 Community Main Pipe Temperature Sensor Comes with a removable mounting sleeve with fixed G1/2 thread. The sensor can be replaced rapidly without draining fluid from pipelines. Applicable to community trunk heating pipes DN65~DN250, significantly cutting later equipment maintenance costs.
Core Product Advantages
Heat metering involves minimal temperature differences, which impose strict requirements on sensor accuracy and response speed. All Duchin heat meter temperature sensors complete pairing calibration before delivery to tightly control temperature measurement errors. Our products fit floor heating, municipal central heating and commercial hot water metering projects. We have stable supply records for overseas heating markets including Europe, Central Asia and Russia. Customization services are available for probe length, cable material and protection grade. Global heating equipment integrators and heat meter manufacturers are warmly welcome to discuss cooperation.