High-Precision PTFE Micro Flow Gear Flow Meter Technical Documentation
- Brand：NOIKE-AH
- Model：NKGF Series
Specification
High-Precision Micro Gear Flow Meter
Product Overview
The High-Precision Micro Gear Flow Meter is a positive displacement (PD) flow meter specifically designed for ultra-low liquid flow measurement.
Using precision-machined elliptical gears, the flow meter provides stable and highly accurate measurement with a minimum detectable flow rate of 0.5 mL/min while achieving measurement accuracy of up to ±0.5% FS.
Its positive displacement measuring principle makes it suitable for applications requiring precise volumetric flow measurement of clean liquids.
Product Features
- High-precision positive displacement measurement
- Minimum detectable flow rate of 0.5 mL/min
- Accuracy up to ±0.5% FS
- Suitable for ultra-low flow measurement
- Stable performance over a wide viscosity range
- Multiple material options available
- Pulse or 4–20 mA signal output
- Intrinsically safe explosion-proof design
- Optional insulated jacket for high-temperature applications
Technical Parameters
Measurement Performance
| Parameter | Specification |
|---|---|
| Measurement Principle | Positive Displacement (Volumetric) |
| Accuracy | ±0.5% FS or ±0.2% FS |
| Minimum Detectable Flow | 0.5 mL/min |
Fluid Specifications
| Parameter | Specification |
|---|---|
| Fluid Viscosity | 2–200 mPa·s (Higher viscosity available upon request) |
| Fluid Temperature | -20°C to +80°C (Standard) |
| High Temperature Version | Up to 200°C (With Heat Sink) |
Operating Pressure
| Material | Maximum Pressure |
|---|---|
| Cast Iron | 1.6 MPa |
| Stainless Steel | 1.6 MPa |
| Cast Steel | 2.5 MPa or 6.4 MPa (Higher pressure available upon request) |
Materials
Available housing materials include:
- Cast Iron
- Cast Steel
- Stainless Steel
Output Signal
Remote and intelligent digital display models support:
| Parameter | Specification |
|---|---|
| Power Supply | 24 VDC |
| Output Signal | Pulse or 4–20 mA |
Explosion-Proof Rating
- Ex ia IIC T5
Optional Configuration
- Insulated Jacket
Operating Principle
The High-Precision Micro Gear Flow Meter consists of a pair of elliptical gears housed within a precision measurement chamber.
When liquid enters the flow meter, a pressure differential is created between the inlet and outlet. This pressure drives the gears to rotate continuously.
Each complete rotation displaces a fixed volume of liquid within the crescent-shaped cavities formed between the gears and the housing.
The total flow volume is calculated by multiplying the number of gear rotations by the fixed displacement volume, providing highly accurate volumetric flow measurement.
Key Features
High Measurement Accuracy
The measurement accuracy is largely unaffected by:
- Fluid viscosity
- Fluid density
- Reynolds number
This ensures stable and repeatable measurement performance across various operating conditions.
Suitable Media
The flow meter is designed for clean liquid measurement.
It is not suitable for:
- Liquids containing solid particles (which may cause gear blockage)
- Gas measurement (which may lead to inaccurate readings)
Performance with High-Viscosity Fluids
Higher-viscosity liquids produce lower internal leakage, resulting in improved measurement accuracy and greater long-term stability.
Design Specifications
Sealed Measuring Chamber
The measuring chamber is formed by precision elliptical gears and the meter housing, creating crescent-shaped measuring cavities that accurately displace a fixed volume of liquid during each rotation.
Pressure-Driven Operation
Mechanical models operate solely through fluid pressure and do not require an external power supply for flow measurement.
Typical Applications
The High-Precision Micro Gear Flow Meter is suitable for applications requiring accurate low-flow liquid measurement, including:
- Chemical dosing systems
- Laboratory equipment
- Pharmaceutical production
- Precision dispensing systems
- Lubrication systems
- Hydraulic oil monitoring
- Fuel measurement
- Ink and coating systems
- Resin and adhesive metering
- OEM fluid control equipment
Product Advantages
The High-Precision Micro Gear Flow Meter combines positive displacement technology, high measurement accuracy, and excellent repeatability for demanding low-flow applications.
Its compact design, wide material selection, optional high-temperature configuration, and explosion-proof capability make it an ideal solution for industrial, laboratory, and OEM flow measurement systems.
Frequently Asked Questions (FAQ)
What is the minimum detectable flow rate?
The flow meter can detect liquid flow rates as low as 0.5 mL/min.
What measurement accuracy is available?
Two accuracy options are available:
- ±0.5% FS
- ±0.2% FS
What liquids can be measured?
The flow meter is designed for clean liquids with viscosities ranging from 2–200 mPa·s. Higher-viscosity applications can be customized.
Is the flow meter suitable for gases or liquids containing particles?
No. It is not recommended for gas measurement or liquids containing solid particles, as these conditions may reduce accuracy or damage the measuring gears.
Does the flow meter support explosion-proof applications?
Yes. The flow meter is available with an Ex ia IIC T5 explosion-proof rating for hazardous environments.
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Talk With Us
- [email protected]
- +86 180 5512 0225
- +86(0551)-65501008
- Address: 206, Block B, No. 2 Tianda Road, High-tech Zone, Hefei City, Anhui Province, China
- We will respond to you within five minutes.
