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Our YG-RLM-15-25 detachable multi-jet mechanical heat meters are high-performance thermal energy measurement solutions tailored for the European and Russian markets. Built with advanced nonmagnetic sensing technology, this series features a compact, detachable structure and elegant design, delivering reliable heat and cold energy metering for residential and light commercial heating systems. With a wide operating temperature range of 4℃ to 95℃ and support for multiple measurement units (kWh, Gcal optional), our mechanical heat meters fully comply with international metering standards, making them the ideal choice for bulk procurement clients, heating system contractors, and real estate developers.
This series of Class 2 heat meters strictly meets the requirements of EN1434 and CJ128 standards, with a wide measuring range ratio (qs/qi = 100:1) and ultra-low startup flow rate. It maintains stable measurement accuracy even at a minimum temperature difference of 3K, ensuring fair and precise thermal energy billing for heating operators and property management teams.
The embedded detachable structure effectively prevents meter damage during building construction and pipeline commissioning, while supporting both horizontal and vertical installation to adapt to diverse pipeline layouts. The pre-installed YG-EAS base allows for quick meter assembly without interrupting pipeline operation, drastically reducing on-site maintenance time and labor costs for engineering contractors.
Optional M-BUS, RS-485, and pulse output communication protocols enable seamless integration with building automation and remote metering systems, supporting centralized data monitoring for district heating projects. The built-in storage module retains 18 months of historical data, with renewable settlement dates, providing full traceability for thermal energy usage data.
Equipped with a high-capacity lithium battery that delivers a service life of over 6 years, paired with a PT1000 high-precision temperature sensor pair, the meter ensures long-term stable operation in harsh heating system environments. Its IP54 protection rating and Class A environmental adaptability make it suitable for various installation scenarios.
Models and Specifications
Model | Qn(m3/h) | Length(mm) | DN(mm) | Sensor length | Display | Romote | Class |
RLM-15-0.6 | 0.6 | 110 | 15 | 1.5m | kw/h | M-BUS | 2 |
RLM-15-0.6 | 0.6 | 110 | 15 | 1.5m | Gcal | RS-485 | 2 |
RLM-15-1.5 | 1.5 | 110 | 15 | 1.5m | kw/h | M-BUS | 2 |
RLM-15-1.5 | 1.5 | 110 | 15 | 1.5m | Gcal | RS-485 | 2 |
RLM-20-2.5 | 2.5 | 130 | 20 | 1.5m | kw/h | M-BUS | 2 |
RLM-20-2.5 | 2.5 | 130 | 20 | 1.5m | Gcal | RS-485 | 2 |
RLM-25-2.5 | 2.5 | 160 | 25 | 1.5m | kw/h | M-BUS | 2 |
RLM-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 | ||
YG-EAS
Pressure Loss Diagram:
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 | 119 | 119 | 119 | 119 | 117 | 117 |
Length | mm | 110 | 110 | 110 | 110 | 130 | 130 |
Dimensional Parameters:
EXPLODED
Mounting for heat meters:
Advanced nonmagnetic flow sensing technology, free from magnetic interference
360° rotatable LCD display with inclined design for easy on-site reading
Supports both heat and cold energy metering for heating and cooling systems
Pressure loss ≤24 KPa at nominal flow, low energy consumption for pipeline operation
18-month local data storage, renewable billing settlement cycles
Suitable for both water inlet and return end installation (customizable on request)
Our multi-jet detachable heat meters are widely used in:
Apartment and residential building district heating and cooling systems
Household thermal energy metering and billing for heating supply companies
Commercial building HVAC system energy consumption monitoring
Municipal heating network renovation and new construction projects
Real estate development supporting heating system engineering
Energy management system integration for building automation
As a leading professional manufacturer of thermal energy and flow measurement instruments in China, we operate a 42,600 square meter modern manufacturing center with a registered capital of 50 million RMB and an annual output of over 1.5 million meters. Our products are exported to more than 20 countries and regions across Europe, Africa, the Middle East, and Southeast Asia. We offer full-cycle support for bulk procurement clients, including customizable OEM/ODM solutions, strict quality control aligned with international standards, and dedicated technical after-sales service. We are committed to providing reliable, cost-effective metering solutions for engineering contractors, heating operators, and real estate developers worldwide.
Our YG-RLM series mechanical heat meters fully meet the Class 2 metering requirements of EN1434 and CJ128 standards, with environmental adaptability reaching Class A, ensuring compliance with global mainstream market access requirements.
We offer three optional communication methods: M-BUS, RS-485, and pulse output, which can be flexibly matched to your existing remote metering and building automation systems.
The meter is equipped with a high-performance lithium battery with a design life of more than 6 years, and supports 18 months of historical data storage to ensure long-term stable operation.
Yes. The meter supports a wide operating temperature range of 4℃ to 95℃, with a minimum measurable temperature difference of 3K, making it suitable for both heating and chilled water cooling system energy metering.
