Reliable High Resolution Gear Flow Meter for High-viscosity Liquid Global Supply
Gear flow meter is a kind of flow meter for measuring volume flow rate with high precision.
With the flow of the medium, the gears mesh and rotate; under the action of fluid flow, the differential pressure is formed at both ends of the instrument's inlet and outlet, and no power supply is required; a pair of gears rotate freely and the cavity between the gears is filled with liquid; the liquid is discharged with the rotation, and the flow rate of the liquid flowing through the instrument can be known by measuring the number of revolutions of the gears.
Accuracy class：
class 0.5, class 0.2
Ambient temperature:
-30℃~60℃
Medium temperature:
-20℃~+60℃, under high temperature adjustment, the heat sink can be reached by adding high temperature 60℃～200℃.
Signal output:
4-20mA analog signal, pulse signal, RS485, HART, etc. are available for selection.
The rotation speed of the gear flow meter is detected by the sensing coil in the signal amplifier installed on the meter housing. The signal amplifier is not in contact with the measured medium.
When the gears of the flow meter cut the magnetic line of force generated by the permanent magnet in the housing, the magnetic flux in the sensing coil will change. The sensing coil sends the detected magnetic flux periodic change signal to the preamplifier, amplifies and shapes the signal, and generates a pulse signal proportional to the flow velocity; the pulse signal is sent to the unit conversion and flow integration circuit to obtain and display the cumulative flow rate value; meanwhile, the pulse signal is also sent to the frequency-current conversion circuit to convert the pulse signal into analog current and then indicate the instantaneous flow rate value. The gear flow meter has high machining precision and is precisely installed. The rotation of the gears is scanned in non-contact form, each tooth generates a pulse, and the resolution is very high. This gear flow meter can measure very small flow rate and quantify small volume liquid.
Calculation formula:
The K coefficient (flow coefficient) of the gear flow meter precisely defines the number of pulses per liter within unit flow rate. The following formula is used:
Q=Instantaneous flow rate m3/h
Q = 3600×F/K
F=Output pulse frequency HZ
K=Coefficient of gear flow meter P/L
Characteristics:
The gear flow meter is a new volumetric flow transmitter, which is used for precise continuous or intermittent measurement of the flow rate or instantaneous flow rate of liquid in a pipeline.
It is especially applicable to the flow measurement of high viscosity media such as heavy oil, polyvinyl alcohol, resin, etc. (it can measure the fluid with viscosity up to 10000Pa.s). It has advantages such as small volume, light weight, low vibration noise and stable operation. It can also be used to measure micro-flow rate in a small pipe diameter. It has features such as small startup flow rate and wide range ratio, and is applicable to measuring liquid flow rate with large variation. Its measuring precision is not affected by the changes of pressure and flow rate, and it has stable performance, long service life and large flow capacity.
Model Dimension
A
B
C
D
E
F
G
H
GF02
Φ83
80
55
70
G1/4
40
M6
16
GF04
Φ83
80
55
70
G3/8
55
M6
16
GF10
Φ83
80
65
70
G1/2
55
M6
14
GF15
Φ113
110
65
70
G3/4
90
M6
28
GF25
Φ148
140
82
70
G1
110
M8
40
GF32
Φ218
170
105
70
G1-1/4
180
M8
45
The above dimensions are standard product dimensions. In special cases, the product can be customized according to the customer’s site needs.
Signal Transmission for Liquid Flow Meters:
Reliable Remote Signal Output for Liquid Flow Measurement Liquid flow meters are widely used in water treatment, chemical dosing, food processing, and industrial pipelines. To meet modern monitoring requirements, liquid flow meters are equipped with multiple signal transmission options for long-distance and real-time data collection.
4–20 mA Analog Output: Provides stable and interference-resistant transmission over long distances. Ideal for continuous liquid flow monitoring and integration with PLC and DCS systems.
Pulse / Frequency Output: Suitable for total flow calculation, batching systems, and water consumption measurement in municipal and industrial applications.
RS485 with Modbus RTU Protocol: Enables digital communication for accurate remote monitoring. Supports multi-point networking and centralized data acquisition.
HART Communication (Optional): Allows remote configuration, diagnostics, and calibration without interrupting operation.
Application Value:
Real-time liquid flow monitoring
Reduced manual meter reading
Improved data accuracy and traceability
Automation Capability of Liquid Flow Meters:
Seamless Integration into Automated Liquid Control Systems
Liquid flow meters play a key role in automated process control, especially where precise flow regulation is required.
Fully compatible with PLC systems (Siemens, Schneider, Mitsubishi, Allen-Bradley, etc.)
Supports SCADA and DCS platforms for centralized control and visualization
Enables automatic valve and pump regulation based on real-time flow feedback
Suitable for closed-loop control in dosing, mixing, and filling processes
Automation Benefits:
Improved process stability
Reduced operator intervention
Enhanced production efficiency and repeatability
IoT & Smart Monitoring for Liquid Flow Meters:
Smart Liquid Flow Measurement with IoT Connectivity
IoT-enabled liquid flow meters allow users to monitor liquid flow data anytime and anywhere.
Wireless Communication Options: NB-IoT, LoRaWAN, Wi-Fi, or Ethernet (depending on configuration)
Cloud Platform Integration: Flow data is transmitted to cloud servers for real-time access, historical analysis, and reporting.
Remote Monitoring Dashboard: Displays instant flow rate, cumulative volume, alarm status, and system diagnostics.
Predictive Maintenance Support: Data analytics help detect abnormal flow patterns, leaks, or blockages early.
IoT Advantages:
Centralized liquid flow management
Lower maintenance costs
Support for smart factories and digital water systems
