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E-mag H Electromagnetic Heat Meter (BTU Meter)

E­-magH heating type electromagnetic flowmeter is an inductive meter that measures the volumetric heat of conductive fluid. The measurement of heat is calculated by multiplying the hot melt value of the inlet and outlet by the flow; part of the principle of the flow measurement is based on Faraday's law of electromagnetic induction.
Product description

Product Overviews

Kaifeng Instrument E-mag series electromagnetic BTU meters (or magnetic BTU meters) are comprised of a converter, a flow sensor and 2 temperature sensors. Then flow sensor is placed inline, the 2 temperature sensors are installed on the inlet pipe and outlet pipe separately, the converter picks up the signals from all the sensors, and calculate the heat according to the flow volume and the temperature difference between the inlet and outlet pipelines.

The well designed structure provides a hermetic seal that protects against moisture and other contaminants. The sealed housing ensures maximum sensor reliability by protecting all internal components and wiring from even the most aggressive environments.

The meter can be used for measuring thermal energy consumption in heating or cooling application for HVAC and other thermal energy measurement and metering installations.



Features and Functions


●  No moving part, therefore wear­free and maintenance­free

●  High accuracy at ±0.5% value of reading

●  Through flow design with unobstructed flow within the measuring pipe

●  Low pressure drop

●  Dual direction flow measurement function

●  Can be used for leakage detection function

●  Heating and cooling application

●  Mounting of the electromagnetic flow sensor in any position

●  Intelligent design and easy to use




Technical Parameters

Medium Conductivity:

≥ 5 µS/cm (Liquids or  mixture)

Media Temperature:

≦80℃ (Polyurethane), ≦120℃ (Neoprene), ≦150℃ (PFA), ≦150℃ (PTFE)

Ambient Temperature:

-25°C ~ 60°C ( Sensor), -10°C/-40°C ~ 60°C ( Convertor)

Sensor Size:

DN50mm ~ DN2600 mm


±0.5% of  reading

Material of Sensor:

Measuring Tube - Stainless Steel 304;  Coil - Copper; Sensor housing - Carbon steel or Stainless steel 304

Liner Material:

PFA, PTFE, Neoprene, PU

Electrode  & Grounding:

Stainless Steel 316L, Hastelloy B,  Hastelloy C, Titanium, Tantalum, Tungsten carbide

Process  Connections:

Flanged, thread

Flange Types:

Standard: ANSI 150# Optional: JIS 10K/   JIS 20K/ JIS 40K ANSI 300#/ ANSI 600# DIN PN 10/ PN 16/ PN25/ PN 40


IP 65, IP67 or IP 68 (Submersible, with remote style)

Power Requirements:

85~265V.AC (45~400Hz),  19~40V.DC




RS485 (Modbus), HART

Industry Applications

Residential or Commercial Buildings metering and submetering

District heating / cooling

Energy Management

Green Energy Management



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Contact information

No. 38, Bianjing Road, Kaifeng, Henan, China

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