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Our YG-RLM(D) series mechanical heat meter is a new-generation integrated single-flow heat meter evolved from our mature YG-RLM platform, tailored for the European and Russian markets. Built with advanced nonmagnetic sensing technology, this compact, lightweight single-flow heat meter delivers reliable thermal energy measurement for both heating and cooling systems in residential and light commercial settings. With a working temperature range of 4℃ to 95℃, it supports optional measurement units of kWh or Gcal, and flexible communication protocols including M-BUS, RS-485, and pulse output to fit diverse system integration needs. This meter fully complies with Class 2 metering requirements of EN1434 and CJ128 standards, ensuring consistent and accurate billing for energy management projects.
Adopting industry-leading nonmagnetic flow sensing technology, our residential heat meter achieves a 100:1 measuring range ratio (qs/qi) and ultra-low startup flow rate, capturing even minimal energy consumption to eliminate billing discrepancies. It maintains stable Class 2 accuracy across its full operating range, with a 3℃ minimum temperature difference, adapting to variable heating and cooling load conditions.
This PT1000 heat meter supports horizontal and vertical installation to fit diverse pipeline layouts, with an embedded removable structure that prevents damage during on-site adjustment. The 360° rotatable display and inclined LCD optimize reading convenience for installers, cutting on-site work time.
Equipped with a high-capacity lithium battery, the meter delivers over 6 years of service life, minimizing maintenance costs for long-term projects. It features renewable payment settlement settings and 18-month local data storage, ensuring full data traceability for energy billing and audits.
With optional M-BUS, RS-485, and pulse output, our RS485 heat meter and M-BUS heat meter easily integrate into centralized energy management systems, enabling real-time data collection, remote monitoring, and smart billing for large-scale projects.
Model | Qn(m3/h) | Length(mm) | DN(mm) | Sensor length | Display | Romote | Class |
RLM(D)-15-0.6 | 0.6 | 110 | 15 | 1.5m | kw/h | M-BUS | 2 |
RLM(D)-15-0.6 | 0.6 | 110 | 15 | 1.5m | Gcal | RS-485 | 2 |
RLM(D)-15-1.5 | 1.5 | 110 | 15 | 1.5m | kw/h | M-BUS | 2 |
RLM(D)-15-1.5 | 1.5 | 110 | 15 | 1.5m | Gcal | RS-485 | 2 |
RLM(D)-20-2.5 | 2.5 | 130 | 20 | 1.5m | kw/h | M-BUS | 2 |
RLM(D)-20-2.5 | 2.5 | 130 | 20 | 1.5m | Gcal | RS-485 | 2 |
RLM(D)-25-2.5 | 2.5 | 160 | 25 | 1.5m | kw/h | M-BUS | 2 |
RLM(D)-25-2.5 | 2.5 | 160 | 25 | 1.5m | Gcal | RS-485 | 2 |
Normal Flow(Qn) | 0.6m3/h | 1.5m3/h | 2.5m3/h |
Flow range(m3/h) | 0.012~1.2 | 0.03~3 | 0.05~5 |
Pressure loss(KPa/Qp) Reference diagram I | 24 | 24 | 24 |
Max. Pressure(MPa) | 1.6 | ||
Temperature range(℃) | 4~95 | ||
Normal flow(Qn) | m3/h | 0.6 | 1.5 | 2.5 | |||
Normal DN | mm | 15 | 15 | 20 | |||
Body thread | ---- | G3/4”B | G3/4”B | G1”B | |||
Connection thread | ---- | 1/2” | 1/2” | 3/4” | |||
Height | mm | 85 | 85 | 85 | 85 | 85 | 85 |
Length | mm | 110 | 110 | 110 | 110 | 130 | 130 |
Mounting for heat meters:
(For Meters used at water supply or return water for option):
Advanced nonmagnetic sensing technology, free from magnetic interference and mechanical wear
Dual-function measurement for heat and cold energy, suitable for year-round HVAC systems
PT1000 high-precision temperature sensor pair for accurate temperature difference monitoring
24KPa pressure loss at nominal flow, minimizing system energy consumption
Standard 1.5m sensor cable, adaptable to most pipeline installation scenarios
Support for water inlet end installation, with return water end models available on request
Our heating and cooling meter is ideal for enterprise clients and project contractors, including residential real estate developers, district heating utility operators, municipal energy management departments, HVAC engineering contractors, and building automation system integrators.
As a professional mechanical heat meter manufacturer in China, we operate a 42,600㎡ modern manufacturing center with an annual output of over 1.5 million meters, serving bulk buyers in more than 20 countries and regions. We offer full OEM/ODM customization, with strict quality control aligned with international standards, ensuring consistent performance and reliable bulk supply for large-scale projects.
It meets Class 2 metering requirements of EN1434 and CJ128 standards, ensuring reliable accuracy for legal energy billing.
We offer optional M-BUS, RS-485, and pulse output to fit different centralized management system integration needs.
Yes, the YG-RLM(D) series supports dual measurement of heat and cold energy for both heating and air conditioning systems.
The built-in high-capacity lithium battery has a designed service life of over 6 years, supporting long-term maintenance-free operation.
