Product Overview

The High-Precision Gear Flow Sensor NKGF is a positive displacement flow sensor designed for precise measurement of low-flow and viscous liquids. Using an internal dual-gear measuring structure, the sensor calculates the volume of liquid passing through the measuring chamber based on the displacement of precision gears, providing accurate continuous or intermittent flow measurement.

Designed for industrial automation and fluid control systems, the NKGF series supports pulse, analog, and switch outputs, making it suitable for monitoring, dosing, batching, and process control applications across multiple industries.

---

Working Principle

The High-Precision Gear Flow Sensor NKGF operates using the positive displacement principle. Two precision gears rotate synchronously as liquid flows through the measuring chamber. Each gear rotation displaces a fixed volume of liquid, allowing the sensor to accurately calculate both instantaneous flow and total flow.

Because each rotation represents a known volume, the sensor delivers excellent accuracy and repeatability, especially when measuring small flow rates and high-viscosity media.

---

Product Features

• Positive displacement dual-gear measuring technology
• Analog and switch dual-output design
• Pulse, 4–20 mA, and PNP/NPN output options
• PNP/NPN freely switchable
• LED/LCD display
• High pressure resistance
• Wide operating temperature range
• Suitable for various viscous liquids
• High measurement accuracy and repeatability
• Wide measurement range with 1:100 turndown ratio
• Corrosion-resistant construction suitable for acidic and alkaline media
• Suitable for continuous and intermittent flow measurement

---

Technical Specifications

---

Applications

The High-Precision Gear Flow Sensor NKGF is suitable for accurate liquid flow measurement in numerous industrial processes.

Chemical Industry

• Caustic soda
• Potassium hydroxide
• Acetic acid
• Softened water

Food & Beverage

• Syrups
• Edible oils
• Condiments
• Beverages
• Honey
• Molasses
• Dairy products
• Fruit juices
• Chocolate
• Alcohol
• Ethanol

Pharmaceutical Industry

• Alcohol
• Syrups
• Glycerol
• Pharmaceutical coatings

Cosmetics

• Shampoos
• Gels
• Perfumes
• Creams

Oil & Gas

• Fuels
• Lubricants
• Petroleum products

Water & Wastewater

• Water treatment chemicals
• Fluorides
• Acids

Pulp & Paper

• Wax finishes
• Dyes
• Acids

Printing

• Solvents
• Printing inks

Automotive

• Transmission fluids
• Glycols
• Hydraulic oils

Textile Industry

• Dyes
• Bleaching agents

Petrochemical Industry

• Crude oil
• Gasoline
• Biodiesel
• Kerosene

Paint Industry

• Solvent-based paints
• Latex paints

Marine, Mining & Metal Processing

• Lubricants
• Fuels
• Heating oils

Adhesive Industry

• Acrylic water-based adhesives
• Solvents
• Cleaning agents

---

Why Choose the High-Precision Gear Flow Sensor NKGF?

High-Precision Flow Measurement

The dual-gear positive displacement design accurately measures the volume of liquid passing through the sensor, making it suitable for low-flow and precision metering applications.

Suitable for Viscous Liquids

Designed to measure a wide range of viscous media, the sensor performs reliably in applications involving oils, resins, adhesives, syrups, and other industrial liquids.

Multiple Output Options

Supports pulse, 4–20 mA, and PNP/NPN outputs for seamless integration with PLCs, industrial controllers, and automation systems.

Wide Pressure and Temperature Capability

Available in multiple housing materials with pressure ratings up to 400 bar and operating temperatures from -196°C to 200°C, meeting diverse industrial requirements.

Flexible Material Selection

Choose from aluminum, stainless steel, or PP housings based on process media compatibility and application needs.

---

Typical Application Case

Precision Resin Dosing in an Industrial Dispensing System

In an automated resin dispensing process, accurate flow measurement is essential for maintaining consistent product quality and minimizing material waste. The High-Precision Gear Flow Sensor NKGF measures the exact volume of resin passing through the pipeline using its dual-gear positive displacement mechanism.

Its high repeatability (±0.1% F.S.) enables stable dosing performance during continuous production, while the selectable pulse, analog, and PNP/NPN outputs allow easy integration with PLC-controlled dispensing equipment. The sensor is well suited for applications involving high-viscosity process fluids where precise volumetric measurement is required.

---

Frequently Asked Questions (FAQ)

What measuring principle does the High-Precision Gear Flow Sensor NKGF use?

It uses a positive displacement dual-gear measuring principle to accurately calculate liquid volume.

What types of liquids can it measure?

It is suitable for many industrial liquids, including oils, syrups, chemicals, lubricants, adhesives, resins, solvents, fuels, and other compatible viscous media.

Which output signals are available?

The sensor supports Pulse, 4–20 mA, PNP, and NPN outputs.

Can the sensor measure low flow rates?

Yes. The measurement range starts from 0.005 L/min, making it suitable for precision low-flow measurement.

Is the measurement range customizable?

Yes. Customized measuring ranges are supported according to application requirements.

What housing materials are available?

The sensor is available with aluminum, stainless steel, and PP housings, depending on pressure and media requirements.

What industries commonly use this sensor?

It is widely used in the chemical, food & beverage, pharmaceutical, cosmetic, petroleum, printing, automotive, textile, water treatment, paint, adhesive, and petrochemical industries.

---

Optional Services

• Customized measuring ranges
• Material selection based on process media
• Technical application support
• OEM and private labeling
• Installation and commissioning assistance

---

Industries Served

• Chemical Processing
• Food & Beverage
• Pharmaceutical Manufacturing
• Cosmetics
• Oil & Gas
• Water Treatment
• Printing
• Automotive
• Textile Manufacturing
• Petrochemical Processing
• Paint & Coating
• Marine Engineering
• Mining
• Adhesive Manufacturing