The detailed analysis is as follows:
1. Application Aspect
Outstanding Adaptability and Core Functions: The mainstream models Pt100 and Pt1000 are the preferred choices for heat meters. Installed in pairs on the supply and return water pipelines, they accurately collect water temperatures within the range of 0℃ - 100℃ through the linear change of resistance with temperature, providing key data for heat calculation. Compared with thermocouples (which have poor accuracy at low temperatures) and NTC thermistors (which lack stability), they feature stable chemical properties, minimal drift, and are suitable for the long-term operation of heating systems. Additionally, their high standardization facilitates the mass production and calibration of heat meters.
Product Type Adaptation to Different Scenarios: In terms of wiring methods, two-wire systems are used in simple heat meters with low precision requirements due to their cost-effectiveness; four-wire systems, with high measurement accuracy and strong anti-interference capabilities, are suitable for high-precision heat meters under complex working conditions. For probes, insertion-type packages are tightly sealed, making them ideal for heating pipelines in ordinary residences with stable working conditions; screw-in types allow flexible adjustment of cable lengths, adapting to scenarios such as old community renovations that require on-site modifications.
2. Market Aspect
Steady Scale Growth and Concentrated Demand: The global market size of RTD (including platinum resistance sensors for heat meters) reached 1.303 billion US dollars in 2024, with the HVAC sector accounting for 25% of the demand. Domestically, driven by the reform of heat metering, the demand for platinum resistance sensors matched with heat meters has expanded synchronously. It is expected that the relevant domestic market size will exceed 12 billion yuan along with the overall platinum resistance sensor market by 2025. The Yangtze River Delta and Pearl River Delta regions, leveraging their industrial cluster advantages, account for 43.2% of the total output and 58% of the high-end product output respectively.
Stratified Substitution in Competitive Pattern: The high-end market is dominated by international manufacturers such as Heraeus and Omron, which control the supporting field of high-precision heat meters through material and technological advantages. Domestic enterprises including AVIC Electro-Measurement and Suntront have entered the mid-end market with cost-performance advantages. In 2023, the market share of domestic manufacturers in the mid-end segment rose to 48%, and their overall market share exceeded 60%. The industry's CR5 (concentration ratio of top 5 enterprises) reaches 41.7%, with leading enterprises enhancing competitiveness through supply chain integration, while small and medium-sized enterprises mainly focus on civil supporting segments.