Intelligent Gas Turbine Flow Meter (LWQ Series)

High-precision monitoring solution specially designed for B2B industrial energy management, urban gas metering and industrial process control

Intelligent Gas Turbine Flow Meter: The Precise Choice for Digital Energy Metering

In industrial gas trade settlement and energy monitoring, even tiny metering deviations can lead to huge cost losses. Nexisense is committed to providing engineering contractors and system integrators with highly stable flow monitoring hardware. Our intelligent gas turbine flow meter is designed to cope with industrial environments with violent fluctuations and complex working conditions. It not only ensures high precision in single-phase gas measurement, but also greatly simplifies on-site installation and later operation and maintenance through deeply integrated digital interfaces.

Core Selling Points

• Wide Range High-Precision Metering: Accuracy class up to 1.0 / 1.5, turndown ratio up to 1:20, perfectly capturing tiny flow changes at low flow velocities.

• Automatic Temperature and Pressure Compensation Technology: Built-in high-precision digital temperature and pressure sensors automatically convert working condition volume flow to standard condition total flow, eliminating environmental fluctuation interference.

• Excellent Integration and Communication Capability: Standard RS485/Modbus communication and 4-20mA output, seamlessly interfacing with DCS, PLC and various industrial IoT cloud platforms.

Industrial-grade Flow Metering Solution: From Precision Hardware to Digital Integration

The metering of industrial gases faces harsh challenges such as large pressure fluctuations, variable medium composition and harsh environments. The Nexisense gas turbine flow meter (LWQ series) is a precision measuring and control instrument developed based on fluid mechanics principles. It is widely used for accurate measurement of natural gas, urban gas, industrial compressed air, nitrogen and other medium-low velocity gases.

By adopting high-performance digital totalizers, Nexisense successfully combines traditional turbine measurement technology with modern micro-power signal processing technology. We not only provide a sensor, but also a reliable and traceable energy data source for system integrators.

Core Technical Advantages

1. Structural Optimization and Low Resistance Design

Nexisense adopts an integrated rectifier structure, which has lower requirements for upstream and downstream straight pipe sections (front ≥ 2DN, rear ≥ 1DN). This is a significant advantage in narrow pump rooms or pipeline layouts. At the same time, its low-speed, long-life mechanical design greatly reduces pressure loss and ensures the economy of system operation.

2. Multiple Protection and Corrosion-resistant Materials

The main body of the instrument can be optionally made of aluminum alloy or stainless steel, with a protection rating of IP65, capable of coping with high-humidity and high-dust environments in chemical and power industries. Its explosion-proof design (Ex) meets the installation requirements of harsh hazardous locations.

3. Advanced Temperature and Pressure Compensation Algorithm

Traditional flow meters are greatly affected by pressure and temperature. Nexisense has embedded high-precision digital temperature and pressure sensors inside, with built-in temperature compensation and correction functions. The totalizer can automatically detect medium parameters in real time and perform compression factor correction, directly outputting volume flow under standard conditions to ensure fairness and transparency of trade settlement.

4. Powerful Data Security and Flexibility

Tamper-proof storage: Adopts large-capacity data storage with tamper-proof function, automatically recording modification records and historical trajectories of key data.

Power-down protection: Real-time data storage function ensures data is not lost when replacing batteries or in case of unexpected power failure, and internal parameters are permanently saved.

Wireless expandability: Supports built-in GPRS or NB-IoT wireless modules to form various wireless meter reading systems. With built-in lithium battery, wireless transmission once a day requires no external power supply, greatly reducing construction costs.

Key Technical Specifications

Wide Range of Application Scenarios

As a core sensor in industrial IoT architecture, Nexisense gas turbine flow meters are widely deployed in the following fields:

• Urban Gas and Public Utilities: Used for trade metering of main gas pipes in residential communities and commercial complexes to ensure the accuracy of settlement data.

• Petroleum and Chemical Production: Monitor natural gas supply and process gas (such as nitrogen, argon) flow distribution in petrochemical production processes.

• Power and Metallurgical Energy Monitoring: Provide real-time flow feedback in power plant fuel supply systems or air/oxygen injection processes in metallurgical plants.

• Compressed Air Energy-saving Retrofit: Efficiency monitoring for factory compressor systems, helping enterprises identify leakage points and optimize energy audit processes.

Wiring Instructions and Installation Guide

To ensure stable system integration, Nexisense recommends that technicians follow the following installation principles:

Horizontal Installation: For best accuracy, horizontal installation is recommended. If vertical installation is required, please specify when ordering, and the flow direction must be from bottom to top.

Electrical Wiring:

• 24VDC power supply mode: Typical industrial four-wire wiring.

• RS485 communication: Shielded twisted pair is recommended. For long-distance transmission, a 120Ω terminating resistor should be connected at the end to suppress signal reflection.

Environmental Avoidance: The installation location should be kept away from strong electromagnetic interference sources (such as large frequency converters and motors) and avoid severe mechanical vibration.

FAQ

Q1: Does the Nexisense gas turbine flow meter support temperature and pressure compensation?

A: Yes. The product has built-in digital temperature and pressure sensors, which can automatically correct the working condition volume and directly output flow and total volume under standard conditions (20.0℃, 101.325kPa).

Q2: Can this flow meter measure wet gas containing oil or water?

A: Turbine flow meters are mainly designed for single-phase clean gas. If the gas contains a large amount of impurities, oil or liquid droplets, it is recommended to install a high-precision filter or gas-liquid separator at the front end to protect the impeller from damage and maintain accuracy.

Q3: How to read Nexisense data through RS485 in a PLC system?

A: The instrument adopts standard Modbus RTU protocol. System integrators only need to configure the corresponding slave address (Slave ID), baud rate (default 9600) and register addresses to read parameters such as instantaneous flow, pressure, temperature and accumulated total.

Q4: How long can wireless data transmission last in battery-powered mode?

A: If a built-in large-capacity lithium battery is used and set to upload data once a day (via NB-IoT/GPRS), the battery life can usually support 1-2 years. For applications requiring real-time monitoring, we recommend connecting to 24VDC external power supply.

Q5: How high are the requirements for upstream and downstream straight pipe sections for instrument installation?

A: Thanks to Nexisense’s unique built-in rectifier design, our instrument only requires straight pipe sections of 2 times the diameter upstream and 1 time downstream to meet the measurement accuracy requirements, greatly saving on-site installation space.

Q6: Does the flow meter have explosion-proof certification?

A: Yes. Nexisense provides Ex-rated explosion-proof products for hazardous conditions. The enclosure is made of high-strength alloy materials and is suitable for flammable and explosive environments such as natural gas stations and chemical production areas.

Q7: If there is large flow fluctuation on site, how is the response speed of the instrument?

A: The totalizer adopts microsecond-level high-speed signal acquisition and processing technology, which can capture flow pulse signals in real time and ensure data continuity under dynamic fluctuating working conditions.

Q8: How to ensure the security of instrument data and prevent unauthorized personnel from modifying it?

A: The instrument has three-level password protection and the internal memory has tamper-proof logic. All modifications to key parameters are recorded by the system, ensuring audit traceability of trade metering.

Summary and Technical Support

The Nexisense intelligent gas turbine flow meter establishes a new trust standard for industrial gas metering by deeply combining mechanical precision with digital intelligence. Whether for precise requirements of trade settlement or as part of IoT nodes in factory digital transformation, this instrument can provide impeccable performance.

Want to get selection advice for your specific working conditions or obtain a detailed Modbus register list?

Contact our technical engineers immediately. We will provide you with comprehensive support from selection evaluation, CAD installation drawings to cloud data docking, making energy management more intelligent and simple.