1. Product Performance

1.1 Measurement Range and Adaptability

• Caliber and Flow Coverage: Nominal diameter DN10~DN200, flow range varies by caliber and type. The conventional DN10 has a flow range of 0.08~0.4m³/h, and DN200 reaches 56~340m³/h; the high-viscosity type can measure media with 200~2000mPa·s, and the DN10 high-viscosity type has a flow range of 0.03~0.2m³/h, adapting to micro-flow to industrial large-flow scenarios.
• Medium and Viscosity Adaptability: Capable of measuring various liquids such as acids, alkalis, salts, organic solutions, diesel oil, and lubricating oil. The conventional type is suitable for viscosities of 0.6~200mPa·s, and the high-viscosity type for 200~2000mPa·s. Stainless steel material can withstand corrosive media, meeting the needs of multiple industries.
• Temperature and Pressure Adaptability: The conventional pointer type has a temperature range of -20~+80℃, and the high-temperature type can reach -20~+200℃; the nominal pressure is 1.6MPa for conventional models, and up to 6.3MPa for cast steel/stainless steel models. High-pressure scenarios can be customized, adapting to normal temperature, high temperature, and high-pressure working conditions.

1.2 Accuracy and Stability

• Measurement Accuracy: The conventional accuracy class is 0.5%, and the high-precision type reaches 0.2%. The electrical performance accuracy is ±1 pulse with excellent repeatability, meeting the needs of trade settlement and precision measurement.
• Operational Stability: Adopts the positive displacement measurement principle. The oval gear rotor is driven by the pressure difference between the inlet and outlet, with no external driving components, low wear, and long service life; low pressure loss. The error of different liquids can be optimized to the best range through the precision adjustment device.
• Signal Output Accuracy: The GF-type photoelectric pulse transmitter has a transmission distance of 0~1000m with stable pulse equivalent; the MF-type 4-20mA transmitter has high output accuracy, supporting zero and full-scale calibration to ensure accurate remote data transmission.

1.3 Structure and Protection Performance

• Material Selection: The body is made of cast iron (LC-A/NA), cast steel (LC-E/NE), or stainless steel (LC-B/NB). The gear material corresponds to the body material, and the sealing packing is wear-resistant, adapting to different medium corrosiveness and pressure requirements.
• Structural Design: Composed of a flow transmitter and a counting mechanism. The high-temperature type is equipped with a radiator, and the high-viscosity type adopts a special gear design; the flange connection complies with JB/T79~82-1994 standard. The length of DN10~DN50 light models is 150~290mm, with a compact structure and easy installation.
• Explosion-Proof Performance: The GF-type transmitter has an explosion-proof rating of ExdⅡBT4, and the explosion-proof liquid crystal display (BELZ) is suitable for flammable and explosive environments, meeting the needs of hazardous locations.

1.4 Power Supply and Output Performance

• Power Supply: The transmitter and transducer support DC12V/24V power supply, adapting to conventional industrial DC power supplies with low power consumption and stable operation.
• Output Signals: Supports pulse output (GF type, frequency 0~487.32P/S), 4-20mA analog output (MF type, optional two-wire/three-wire system), and RS485 communication (ELZ type). It can be matched with secondary instruments, PLC, and DCS systems to realize data remote transmission and centralized control.

2. Core Selling Points

2.1 High Viscosity Adaptability + Wide Turndown Ratio for Versatile Applications

• The high-viscosity type can stably measure viscous liquids of 2000mPa·s, solving the pain point that conventional flow meters are difficult to measure heavy oil, lubricating oil, and high-viscosity organic solutions; wide turndown ratio, 1:15~1:20 for conventional types and 1:7~1:10 for high-viscosity types, covering multiple flow ranges without frequent instrument replacement.
• The high-temperature type can withstand -20~+200℃, adapting to high-temperature heat transfer oil, high-temperature resin and other media. The stainless steel material has strong corrosion resistance, and can be used for the measurement of corrosive liquids such as acids and alkalis, with far superior industry adaptability than ordinary flow meters.

2.2 Positive Displacement Measurement + High Precision for Reliable Metering

• Based on the positive displacement measurement principle, the oval gear measures a fixed volume of liquid per rotation (four times the crescent-shaped cavity). The measurement accuracy is not affected by flow velocity distribution and viscosity changes, and the 0.2-level high-precision type meets the needs of trade settlement and precision measurement.
• Equipped with a mechanical pointer + character wheel accumulation device for on-site intuitive display of cumulative flow; supports multiple outputs of pulse, 4-20mA, and RS485, with traceable data. Errors can be corrected through adjusting the gear set, ensuring stable accuracy during long-term operation.

2.3 Sturdy Structure + Flexible Installation for Easy Maintenance

• The body is integrally formed of cast iron, cast steel, or stainless steel. The gears and bearings are wear-resistant with no vulnerable parts, resulting in a long maintenance cycle; installation supports horizontal/vertical installation (gears must be horizontal), and the counter can be rotated 180° or 90° for easy reading, adapting to complex pipeline layouts.
• A straight pipe section can be used to replace the meter during pipeline flushing to protect the instrument, and a filter installed at the front end can prevent debris from entering; troubleshooting is simple, and common problems such as stuck gears and unstable pointers can be quickly resolved, reducing maintenance costs.

2.4 Multiple Types + Versatile Functions for Strong Adaptability

• Rich models, including conventional type, high-temperature type (T), high-viscosity type (N), jacketed type (U), and explosion-proof type (BELZ), which can be accurately selected according to medium characteristics, temperature, pressure, and explosion-proof requirements.
• Diversified counter functions, supporting pointer display, pointer reset, and liquid crystal display (instantaneous/cumulative flow). The transmitter can be optional with pulse or 4-20mA output, meeting various functional needs such as on-site display, remote control, and quantitative filling.

3. Main Functions

3.1 Accurate Flow Metering and Display

• Cumulative Flow Metering: Mechanical pointer + six-digit character wheel accumulation display. The liquid crystal type (ELZ) can display cumulative flow (unit: liter/cubic meter) and support cumulative reset, adapting to batch metering and total statistics with long-term data retention.
• Instantaneous Flow Monitoring: The liquid crystal type displays instantaneous flow in real time. The MF-type 4-20mA output signal has a linear correspondence with instantaneous flow, which can be read through secondary instruments or upper computers to dynamically grasp flow changes.
• Micro-Flow and High-Viscosity Adaptability: The high-viscosity type adopts an optimized gear design to reduce the starting flow and accurately measure low-velocity high-viscosity liquids; the conventional type ensures measurement accuracy in the micro-flow section through small-signal processing.

3.2 Signal Output and Remote Control

• Pulse Output: The GF-Ⅰ/Ⅱ type transmitter converts flow into electrical pulse signals with a transmission distance of 1000m and a pulse equivalent of 0.000285~0.4L/P, which can be matched with a flow totalizer to realize remote cumulative metering.
• Analog Output: The MF-type transmitter outputs 4-20mA signals, supporting two-wire/three-wire wiring. It adapts to different flow ranges through P00-P04 parameter settings and can be connected to PLC and DCS systems to realize closed-loop control.
• Communication Function: The ELZ type supports RS485 communication with Modbus protocol, enabling remote reading of instantaneous flow, cumulative flow, and device status, as well as remote parameter modification for convenient centralized management.

3.3 Alarm and Quantitative Control

• Quantitative Control: Combined with secondary instruments, it can realize quantitative filling function. After setting the target flow, the relay output controls the valve to close when the threshold is reached, adapting to chemical batching, oil filling and other scenarios.
• Fault Early Warning: Faults such as unstable pointer rotation and no signal from the transmitter can be quickly troubleshooted. The explosion-proof type operates stably in hazardous environments to avoid potential safety hazards; the over-tolerance error can be corrected by adjusting the gear set.

3.4 Parameter Setting and Calibration

• Transmitter Calibration: The MF-type transmitter can set pulse equivalent, range, and 4-20mA zero/full-scale adjustment through the M key (switch display) and S key (modify parameters), and the current output accuracy meets the standard after calibration.
• Error Adjustment: By replacing the adjustment gear set (such as 38/35, 41/38) in the counter, the mechanical transmission ratio is changed to adjust the error to the qualified range, and precision optimization can be completed without returning to the factory.
• Function Configuration: Select the counter type (pointer/reset/liquid crystal) and transmitter type (pulse/4-20mA) according to requirements, and customize the functional combination adapting to different industrial scenarios.