Solving the Challenge of Precise Metering for High Viscosity Micro Flow, Providing Stable and Reliable Industrial-grade Volumetric Flow Measurement Solutions

The Nexisense YYCL series gear flow meter adopts the principle of precision circular gear meshing and is suitable for high viscosity media such as heavy oil, polyvinyl alcohol, resin, syrup, and hydraulic oil. The minimum measurable liquid flow range is as low as 0.01 L/min, with a repeatability accuracy of up to ±0.05%. It is widely used in scenarios requiring high precision continuous or intermittent flow measurement.

Three Core Selling Points:

• Micro Flow High Precision Measurement: Starts measuring from a minimum flow of 0.01 L/min, maintains high precision even in low flow rate ranges, with a wide turndown ratio of 1:100.

• Strong Adaptability to High Viscosity Media: Viscosity range covers 1~100,000 cSt (depending on model), with high pressure resistance (stainless steel base meter up to 40 MPa), wide temperature resistance (-60℃~150℃), and outstanding anti-interference capability.

• Easy IoT Integration Capability: Supports pulse output, 4-20mA analog output, and RS485/Modbus RTU protocol, outputs instantaneous flow and cumulative flow in real time, facilitating integration into DCS, PLC, and SCADA systems for remote monitoring and data traceability.

Overview

The Nexisense YYCL series gear flow meter (also known as circular gear flow meter or volumetric gear flow meter) is a new type of volumetric flow instrument developed based on the gear motor principle. Inside the meter, a pair of precision-machined circular gears mesh and rotate within the metering chamber, forming fixed-volume sealed cavities. Each rotation discharges a fixed volume of liquid, and the instantaneous flow and cumulative flow are accurately calculated by detecting the number of gear rotations.

The product is particularly suitable for measuring high viscosity liquids with no particles or micro particles, including heavy oil, polyvinyl alcohol, resin, glue, syrup, asphalt, hydraulic oil, and other media. It can accurately measure even micro flows and maintains high precision and high repeatability even at the lower limit of low flow rates. The meter offers flexible output methods, with optional LCD display (instantaneous + cumulative flow), pulse output, 4-20mA current output, or RS485 communication.

While retaining the reliable structure of the classic YYCL series, Nexisense has strengthened the industrial IoT integration features. System integrators can directly connect the flow meter to automation control systems via the standard RS485/Modbus protocol to achieve real-time collection, trend analysis, and alarm linkage of flow data. Engineering contractors can quickly deploy it in projects in industries such as petrochemical, pharmaceutical, food, coatings, and metallurgy, ensuring controllability, traceability, and high reliability of the fluid metering process.

This series of flow meters features a pre-amplifier, user-friendly terminals, low pressure drop, low noise, high pressure and low temperature resistance, and high reliability of electronic components. It is the preferred equipment for precision metering of high viscosity liquids in industrial field applications.

Main Advantages

The Nexisense YYCL series gear flow meter has been optimized in structural design, material selection, signal processing, and system integration, with emphasis on stability, high precision, anti-interference capability, and ease of integration to meet the needs of long-term stable operation in B2B projects.

1. Volumetric Gear Measurement Principle and High Precision
          Adopts a precision gear meshing structure. The measurement is not greatly affected by changes in medium viscosity (within the specified viscosity range). Repeatability accuracy ±0.05% (under the same working conditions), accuracy ±0.5% (for viscosity >20cSt or 30cSt and above), turndown ratio 1:100. Even at the lower limit of the low flow rate measurement range, it still maintains high precision and high repeatability, especially suitable for micro flow scenarios.

2. High Viscosity Media Adaptability and Wide Range
   

• Viscosity range is wide: up to 1-100,000 cSt (slight differences between models).

• Flow range covers 0.01~200 L/min (multiple models available).

• Minimum measurable liquid flow as low as 0.01 L/min, meeting the demand for precise metering of micro or high viscosity liquids.

• High pressure resistant design: stainless steel base meter working pressure up to 40 MPa, aluminum alloy base meter 2 MPa.

• Wide temperature range: -60℃~150℃ (some models support even lower temperatures).

3. Industrial-grade Materials and Anti-interference Protection
   

• Gear material: stainless steel 316L or German standard stainless steel 1.4122.

• Bearings: 440 stainless steel ball bearings or tungsten steel alloy sliding bearings.

• Sealing material: FPM (fluororubber).

• Maximum allowable impurity particle size 20~30μm, suitable for high viscosity media containing micro particles.

• Low pressure drop and low noise design, reducing impact on process pipelines.

• Pre-amplifier design ensures stable signals, strong anti-electromagnetic interference capability, and high operational reliability of electronic components.

• High protection level, suitable for harsh industrial field environments.

4. Multiple Output Methods and Easy Integration
   

• Optional outputs: pulse output, 4-20mA analog output, RS485 communication (Modbus RTU protocol), or combined outputs.

• Supports LCD display of instantaneous flow and cumulative flow for convenient on-site observation.

• RS485/Modbus interface supports multi-slave networking, flexible baud rate configuration. Data includes instantaneous flow, cumulative flow, status information, etc., facilitating integration into industrial IoT platforms for remote monitoring, data recording, and automated control.

• Flexible connection methods: threaded or flanged optional; various converter types (with/without display, housing material optional stainless steel or aluminum alloy).

• Open structure concept, relatively convenient maintenance.

These advantages make the Nexisense YYCL gear flow meter not only a flow measurement instrument but also a reliable node that can be deeply integrated into smart factory metering and control systems, helping users reduce metering errors and improve process control precision.

Technical Specifications

The main technical parameters of the Nexisense YYCL series gear flow meter are as follows:

Model Specification Parameter Table

Physical and Electrical Parameters

• Connection methods: Threaded, flanged (optional)

• Protection and anti-interference: Industrial-grade design, compliant with on-site electromagnetic compatibility requirements

• Power supply: Depends on output type (pulse 5-26V, current 12-26V, etc.)

• Dimensions and weight: Vary by model (see outline drawing for details)

Applications

The Nexisense YYCL series gear flow meter is widely used in the following high viscosity or micro flow metering scenarios:

1. Petrochemical and Heavy Oil Transportation Precise measurement of flow for high viscosity media such as heavy oil, hydraulic oil, and lubricating oil. Supports RS485 access to DCS systems for precise process control.

2. Coatings, Resin, Glue Production Metering of high viscosity liquids such as polyvinyl alcohol, resin, and adhesives. Micro flow control ensures batching precision and meets production quality requirements.

3. Food and Pharmaceutical Industry Measurement of media such as syrup, honey, and medicinal liquids. The temperature and pressure resistant design complies with hygiene or GMP requirements and supports cumulative metering and batch management.

4. Metallurgy and Mechanical Hydraulic Systems Monitoring of hydraulic oil or coolant flow. High pressure resistance ensures safe equipment operation, with data integrated into PLC for automated monitoring.

5. Environmental Protection and Fine Chemicals Handling of special media such as acids, alkalis, and hydrofluoric acid (pay attention to compatibility during selection). Realizes micro flow dosing or discharge metering.

6. Laboratory and Metering Calibration Used as a high precision reference instrument for flow standard devices or small flow verification. Supports Modbus remote data acquisition.

Wiring and Installation

Installation and wiring tips (please refer to the product manual for details):

• Ensure there are no large particle impurities in the pipeline during installation. The flow meter can be installed horizontally or vertically, with the arrow direction consistent with the medium flow direction.

• Use threaded or flanged connections, ensure reliable sealing to avoid leakage.

• Electrical wiring:

• Pulse output: Power+, GND, signal output.

• 4-20mA current output: Power+, GND, current signal.

• RS485: A/B signal lines (shielded cable recommended), correctly configure address and baud rate.

• Check wiring before powering on. It is recommended to use isolated power supply to reduce interference.

• When using for the first time, slowly introduce the medium and exhaust air to avoid dry running damage to the gears.

• Regularly check seals and bearings. Arrange maintenance according to medium viscosity and impurity conditions.

For high viscosity media, appropriate heating can be applied to reduce viscosity and improve measurement stability.

FAQ

Q1. What is the minimum measurable flow of the Nexisense YYCL gear flow meter?
   The minimum measurable liquid flow range is 0.01 L/min (starting from YYCL2 model), suitable for precision metering of micro flows.

Q2. How high viscosity liquids can it measure?
   The viscosity range supports up to 1-100,000 cSt (slight differences between models). It is particularly suitable for high viscosity media such as heavy oil, resin, and glue.

Q3. What output signals are supported? Can it be connected to PLC or SCADA?
   Supports pulse, 4-20mA, and RS485/Modbus RTU outputs. It can be easily integrated into DCS, PLC, or industrial IoT platforms.

Q4. What are the working pressure and temperature range?
   Stainless steel base meter up to 40 MPa, temperature range -60℃~150℃, suitable for most industrial conditions.

Q5. How is the accuracy and repeatability?
   Accuracy ±0.5% (under specified viscosity conditions), repeatability ±0.05%. It maintains high performance even at the lower limit of low flow rates.

Q6. What should be noted during installation?
   The medium must be free of large particle impurities, installation direction must be correct, wiring must be standard. Shielded cables are recommended to reduce interference.

Q7. What are the suggestions for using high viscosity media?
   Select the model according to the characteristics of the medium. Heat if necessary to reduce viscosity. Regularly check the gears and sealing condition.

Q8. What is the warranty and maintenance cycle?
   The standard warranty period is executed according to the contract. It is recommended to regularly check seals and bearings according to usage conditions. Caution is required when the medium contains iron ions (there is a magnet inside the gear).

Summary and Call to Action

The Nexisense YYCL series gear flow meter takes the volumetric gear principle as its core. With its micro flow high precision, strong high viscosity adaptability, and RS485/Modbus easy integration features, it provides system integrators and engineering contractors with a professional and reliable industrial liquid flow measurement solution. It effectively solves the metering pain points in high viscosity and micro flow scenarios, ensuring the accuracy of process control and data traceability.

Whether in continuous production in petrochemicals or batching control in fine chemicals, the Nexisense YYCL gear flow meter can become a stable cornerstone of your fluid metering system.

Need targeted model selection advice, Modbus integration guidance, outline dimension confirmation, or project quotation? Welcome to contact the Nexisense technical team. We will provide customized recommendations and complete technical support based on your medium characteristics, flow range, pressure and temperature requirements, and system integration needs. Take action now to make high viscosity micro flow metering more precise, smarter, and more efficient.