1. Product Performance

1.1 Measurement Range and Adaptability

• Caliber and Flow Coverage: Nominal calibers range from GF02 (G1/4) and GF04 (G3/8) to GF32 (G1-1/4), with a measurement range of 0.6~20000L/h. The minimum range of GF02 is 0.6~50L/h, and the maximum range of GF32 is 2000~20000L/h, adapting to micro-flow to large-flow scenarios.
• Medium and Viscosity Adaptability: Capable of measuring viscous media such as heavy oil, resin, glue, and hydraulic oil with a maximum viscosity of 10000Pa·s. It is also compatible with conventional and special fluids such as liquid nitrogen, refrigerants, and edible oils, featuring strong corrosion resistance, pollution resistance, and tolerance to acid and alkali media.
• Temperature and Pressure Adaptability: The standard operating temperature is -15~80℃, with high-temperature customization available (-196℃~200℃); the maximum pressure bearing capacity is 150Bar (15MPa) for aluminum alloy materials and 400Bar (40MPa) for stainless steel materials, with high-pressure customization up to 45MPa, adapting to extreme working conditions.

1.2 Accuracy and Stability

• Measurement Accuracy: The turndown ratio is as wide as 1:100, with an accuracy of ±0.5% within the 1:10 range and ±1.0% within the full range, featuring excellent repeatability to meet precision measurement needs.
• Signal Output Accuracy: High-resolution pulse output with a fixed pulses per liter (K factor) (e.g., 11200P/L for GF02 and 39.9P/L for GF32); 4-20mA analog output with a load ≤500Ω, supporting zero and full-scale calibration for reliable accuracy.
• Operational Stability: Gears are precision-machined and installed, with non-contact magnetoelectric sensing to avoid contact wear, resulting in low vibration and noise during operation; low starting flow, less affected by pressure and flow changes, stable long-term performance, and long service life.

1.3 Structure and Protection Performance

• Material Selection: The main body is available in stainless steel, aluminum alloy, and PP, with sealing materials optional in FKM (fluororubber) and PP, adapting to different medium corrosion requirements and strong pollution resistance.
• Connection Methods: Supports thread connection, flange connection, sanitary flange connection, ferrule connection, and quick clamp connection. The interface specifications comply with general standards (such as G1/4, G3/8, etc.), ensuring strong installation compatibility.
• Structural Dimensions: Standard products have a compact design, with GF02~GF10 all having an outer diameter of Φ83mm and length of 80mm, light weight, large flow capacity, and no excessive installation space required.

1.4 Power Supply and Output Performance

• Power Supply: Pulse output type supports DC11~26V power supply, and 4-20mA output type supports DC18~36V power supply, adapting to conventional industrial power supply scenarios.
• Output Signals: Optional pulse output (3-wire system), 4-20mA analog output, and RS485 communication (supporting Modbus-RTU/ASCII protocol). The pulse width is adjustable from 0~1000ms, and the maximum frequency output is 100~5000Hz, meeting different data transmission needs.

2. Core Selling Points

2.1 Wide Turndown Ratio + High Viscosity Adaptability for Versatile Applications

• Turndown ratio of 1:100, enabling precise measurement from micro-flow (0.6L/h) to large-flow (20000L/h) without frequent instrument replacement; capable of withstanding high-viscosity media up to 10000Pa·s, solving the pain point of conventional flow meters being unable to measure viscous fluids.
• Outstanding high-pressure and high-temperature resistance, with stainless steel materials bearing up to 40MPa and high-temperature customized versions adapting to -196℃~200℃, suitable for extreme working conditions such as chemical industry, petroleum, and low-temperature engineering.

2.2 Positive Displacement Measurement + Non-Contact Sensing for Reliable Accuracy

• Based on the positive displacement measurement principle, the gear meshing rotation quantitatively accommodates and discharges fluid in the cavity. The measurement accuracy is not affected by flow velocity distribution or pressure fluctuations, with strong data repeatability.
• Adopts magnetoelectric induction sensing, with the sensor not in contact with the medium, avoiding corrosion and wear, and reducing failure points; each tooth corresponds to one pulse, with high resolution, enabling small-volume quantitative measurement.

2.3 Compact Structure + Flexible Installation for Easy Maintenance

• Compact design (minimum outer diameter Φ83mm) and light weight, supporting horizontal installation (recommended) and vertical installation (fluid flow from bottom to top), adapting to narrow installation spaces; diverse connection methods to meet different installation needs such as thread, flange, and ferrule.
• No clogging design during operation, long maintenance cycle (recommended once every three months). During maintenance, operation can be performed through the bypass pipeline without affecting normal fluid transmission; the filter only needs regular cleaning, and the internal gear is easy to disassemble and clean. After replacement, it can be put into use after recalibration.

2.4 Rich Signal Output + Adjustable Parameters for Strong Adaptability

• Supports three output methods: pulse, analog, and RS485, which can be directly connected to counters, PLC, DCS and other systems; strong compatibility with Modbus communication protocol, with optional baud rate 1200~38400 and adjustable device address 1~247.
• Flow unit (L, m³, USG, Kg, etc.), decimal places, small signal cutoff, alarm threshold and other parameters can be set through the menu, with adjustable damping time 0.1~30.0 seconds, adapting to different measurement and control needs.

3. Main Functions

3.1 Accurate Flow Measurement and Accumulation

• Instantaneous Flow Measurement: Based on the formula Q=F×60/K (Q is instantaneous flow in L/min, F is output pulse frequency in Hz, K is flow coefficient in P/L), real-time calculates and displays instantaneous flow, supporting multi-unit switching (L/h, m³/h, etc.).
• Cumulative Flow Statistics: Automatically counts total cumulative flow, supporting total reset and preset functions. The total unit can be customized (L, m³, Kg, etc.), with 0~3 adjustable decimal places, meeting measurement traceability needs.
• Small Signal Processing: Supports 0.0%~9.90% range small signal cutoff function to avoid low-flow interference and ensure the validity of measurement data.

3.2 Signal Output and Communication

• Pulse Output: 3-wire connection (brown +11~26V, blue GND, black IN), optional pulse equivalent 0.001~9999.0L/pulse, adjustable pulse width, suitable for flow counting and quantitative control.
• Analog Output: 4-20mA current output, with flow values corresponding to 4mA and 20mA settable through the menu, supporting flow direction identification (4~20mA for forward direction, 0~4mA for reverse direction), adapting to closed-loop control of control systems.
• RS485 Communication: Supports Modbus-RTU/ASCII protocol, enabling remote reading of instantaneous flow, cumulative flow, device status and other data, and remote parameter setting for convenient centralized management.

3.3 Alarm and Control Functions

• High/Low Alarm: Supports setting of high flow alarm (1.00%~99.00% of range) and low flow alarm (0.00%~99.00% of range), with alarm contact capacity ≤30mA (24VDC), which can link external equipment to realize abnormal early warning.
• Quantitative Control: Built-in batch controller, which can realize quantitative delivery control through pulse output or relay output. The quantitative value is set in the menu, suitable for chemical batching, food filling and other scenarios.

3.4 Parameter Calibration and Setting

• Instrument Calibration: Supports current zero calibration (range 3.0~5.0mA) and current full-scale calibration (range 19.0~21.0mA), automatically completing calibration by inputting the measured value of the multimeter to ensure the accuracy of analog output.
• Linear Correction: Supports 11-segment linearization correction, setting correction points from high to low frequency to optimize measurement accuracy in different flow segments. To cancel correction, simply input "0" for the number of linear segments.
• System Setting: Core parameters such as fluid type, caliber, and instrument coefficient can be set, supporting password protection (factory password 052500) to prevent misoperation, and parameters are not lost after power failure.