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Ultrasonic flowmeter wiring is mainly divided into two parts: host wiring and probe wiring. There are differences between different brands and models, and it is necessary to follow the product manual for accuracy. 1. Power input for host wiring: Supports AC 220V or DC 24V power supply. Choose one of them according to the wiring diagram. Sensor interface: - Downstream probe connected
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2. Terminal 3 (GND, DN -, DN+), usually only need to be connected to DN - and DN+(terminals 2 and 3) - Upstream probe connected
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5. Terminal 6 (GND, UP -, UP+), usually only need to be connected to UP - and UP+(terminals 5 and 6) 4-20mA output: AO terminal connected to signal positive pole, 24V - terminal connected to signal negative pole 485 communication: connect 485 OUT A and 485 OUT B terminals Heat meter function: - Water supply terminal connected to TX
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1. GND - Return terminal TX
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2. GND (supply and return GND are connected together) Relay output: Connect RELAY+and RELAY - terminals 2. Probe wiring Probe cables usually include shielded wires, signal positive (+) and signal negative (-) terminals. Conventional connections only require connecting the+and - terminals, and shielded wires can be omitted. Due to possible differences in terminal definitions and wiring methods among different manufacturers, please make sure to check the wiring diagram provided in the instruction manual before actual wiring.
According to the industry information updated on February 9, 2026, the list of the top ten flowmeter manufacturers is as follows:
1. Emerson belongs to Emerson Electric (China) Investment Co., Ltd., which is at the forefront of technology in the fields of oil and gas trade handover and multiphase flow measurement. Its products meet the highest international standards and are suitable for high demand scenarios such as oil and gas extraction, transportation, and trade settlement.
2. MicroSensor, a subsidiary of MicroSensor Co., Ltd., provides measurement verification and calibration services for various types of flowmeters including pressure, electromagnetic, ultrasonic, quality, and differential pressure.
3. YOKOGAWA Belonging to Yokogawa Electric (China) Co., Ltd., the product design is excellent and the stability is outstanding. It has a deep foundation in industries such as chemical and water treatment, and is suitable for process industries that have strict requirements for accuracy and long-term stability. Bronkhorst belongs to Bronkhorst (Shanghai) Measurement Equipment Trading Co., Ltd. and is a wholly-owned subsidiary of Bronkhorst High Tech B.V in China. It is responsible for product sales, after-sales service, and technical support in the Chinese region. 5. Fischer Porter belongs to Beijing Fischer Porter Technology Development Co., Ltd., focusing on the research and production of fluid monitoring instruments, especially in special working condition flow rates. Experienced in metrology, our main products include high-pressure electromagnetic flow meters, vortex flow meters, etc.
6 Aisite Instrument belongs to Aisite Instrument (Shanghai) Co., Ltd. and is one of the leading brands of ultrasonic flow meters and heat meters in China. It is particularly strong in the field of heating metering, focusing on ultrasonic measurement technology. 7. Beite Inte
