The electromagnetic heat meter is mainly a device that measures the real-time supply temperature, return temperature, and instantaneous flow rate of the energy medium (liquid water) in the heat exchange system, and calculates and saves the cooling or heating value consumed by the system according to the thermodynamic energy calculation formula. The joint measurement electromagnetic (cold) heat meter is suitable for industries such as air conditioning return water, building energy management, and heating.

The measurement principle of the circulating water flowmeter is based on Faraday's law of electromagnetic induction. The sensor part is composed of coils and electricityComposed of polar and insulating liningWhen measuring, the excitation coil in the sensor is energized to generate a magnetic field. When the conductive fluid passes through the magnetic field, a small induced electromotive force is generated due to the cutting force of the magnetic field lines. These small induced electromotive forces are collected by the electrodes and transmitted to the converter part of the instrument for signal amplification, correction and other operations. Then, they are converted intoThe corresponding flow data is ultimately displayed on the instrument.

When a conductive fluid flows through a magnetic field perpendicular to the flow direction, the conductive liquid induces an induced voltage E proportional to the average flow velocity. The induced voltage is detected by two electrodes in direct contact with the fluid, amplified, filtered, and shaped by a converter, and sent to the MCU to display and output control the instantaneous flow rate and cumulative flow rate.

E=KBVD In the formula: E - Induced voltage K - Instrument constant B - Magnetic induction intensity V - Average flow velocity inside the measuring tube D - Diameter of the flowmeter

• The instrument structure is simple and reliable, with no movable parts and a long working life

• No flow blocking components, no pressure loss or fluid blockage.

• The measuring tube has no resistance components, no pressure loss, and is not affected by poor water quality

• The measurement accuracy is not affected by the type of measured medium and its physical parameters such as temperature, viscosity, pressure, etc.

• A separately designed sealing component at the connection between the sensor and the meter head can prevent external moisture from entering the meter head and sensor through the connection

• The excitation and electrode wires are both made of high-quality single core shielded wires, which can reduce interference, improve signal cleanliness, and thus enhance measurement accuracy.

• The surface paint of the sensor is made of metal fluorocarbon paint. The fluorocarbon bonds attached to the fluorocarbon resin molecules in the metal fluorocarbon paint can resist the degradation of ultraviolet radiation, exhibiting extremely excellent durability, UV resistance, and weather resistance, making the metal fluorocarbon paint coating long-lasting and perfect, reducing maintenance requirements. Large screen LCD backlit display, with clear readings in both strong and low light conditions

• The LCD screen displays instantaneous flow rate, instantaneous heat, cumulative flow rate, cumulative heat, inlet temperature, outlet temperature, temperature difference, and flow rate

• The language can display both Chinese and English

• Capable of RS485, Modbus, and HART communication

• Adopting the enthalpy correction method based on temperature changes to ensure accurate measurement at different water temperatures

• 220V AC, 24V DC power supply

Electromagnetic thermal energy meter and sensor technical data

Electromagnetic thermal energy meterConverter technology data

Electromagnetic thermal energy meterMeasurement range:

General requirements

• For the convenience of installation, maintenance, and upkeep, sufficient space should be reserved around the flowmeter

• Avoid installing flow meters in places with large temperature changes or high temperature radiation from equipment

• Flow meters should be installed indoors. If installed outdoors, direct sunlight should be avoided and sun protection devices should be installed if necessary

• Avoid installing flow meters in environments containing corrosive gases

• Avoid installing flow meters in places with strong vibration sources and magnetic fields

Process management requirements

• The inner diameter of the upstream and downstream process pipes and the inner diameter of the flow meter should meet the following requirements: 0.98DN ≤ D ≤ 1.05DN (DN: flow meter inner diameter; D: Inner diameter of process pipe

• The process pipe and flow meter should be concentric, with a coaxial deviation of no more than 0.05DN