Technical Specifications

Performance & Conditions of Use

Electrical & Signal

Why Choose a Gas Turbine Flow Meter?

A gas turbine flow meter is engineered specifically for the precise volumetric measurement of clean industrial gases in pressurized pipelines. Unlike thermal mass flow meters — which measure mass flow and require stable gas composition — the gas turbine meter measures volumetric flow directly at line conditions and is virtually unaffected by changes in gas density, pressure, temperature, and viscosity during normal operation.

For applications such as natural gas custody transfer, compressed air monitoring, and nitrogen supply verification, the turbine principle delivers the combination of high accuracy and outstanding repeatability that process engineers and plant operators require.

• High accuracy — ±1.0%R standard; suitable for trade metering, billing, and process control
• Excellent repeatability — 0.05%–0.2% short-term repeatability; the critical parameter for batch totalization, gas custody transfer, and financial reconciliation
• Wide turndown ratio — medium and large diameters achieve 1:20 to 1:30, small diameters 1:10; covers wide fluctuations in gas supply and demand with a single meter
• Low pressure loss — only 0.1–2.5 kPa under normal pressure; suitable for low-pressure gas distribution systems where pressure drop is a critical constraint
• Pulse output with zero drift — the direct frequency output has no zero drift and strong anti-interference ability; integrates cleanly with PLCs, gas totalizers, SCADA, and DCS without signal conditioning
• Dual power supply — built-in lithium battery and external 24VDC; transmission distance up to 1000 m; suitable for remote field installations without power infrastructure
• Rich display information — wide-screen display simultaneously shows instantaneous flow, daily and total cumulative flow, temperature, pressure, time, date, and battery level in a single view
• Explosion-proof for hazardous gas areas — Ex d IIB T6 Gb certification covers Zone 1 and Zone 2 hazardous area installations in natural gas, petroleum, and chemical facilities

For natural gas billing and industrial gas supply metering, the gas turbine flow meter’s ±1.0%R accuracy and 0.05%–0.2% repeatability make it one of the most reliable choices at this precision level. The zero-drift pulse output cumulates without error, and the lithium battery option supports long-term remote site operation with signal transmission up to 1000 m.

Typical Applications

🔧 Natural Gas — Metering & Custody Transfer

The Challenge: Natural gas distribution networks require accurate, repeatable volumetric metering at city gate stations, industrial connection points, and commercial billing meters. Measurement errors directly translate to financial losses in custody transfer.

Why This Meter: The Soaring gas turbine flow meter delivers ±1.0%R accuracy with 0.05%–0.2% short-term repeatability via a direct pulse output — no zero drift, strong anti-interference. Ex d IIB T6 Gb explosion-proof rating covers Zone 1 and Zone 2 hazardous areas at gas distribution points. DN25–DN250 covers branch connections to large main headers. The wide-screen display shows instantaneous flow alongside total cumulative, temperature, and pressure simultaneously — eliminating the need for separate instruments at metering skids.

🔧 Compressed Air — Industrial Plant Monitoring

The Challenge: Compressed air is one of the most expensive utility streams in manufacturing plants. Plant engineers need accurate meters on branch headers to monitor consumption, identify unmetered usage, and perform energy audits across production lines.

Why This Meter: For clean, dry compressed air within the meter’s medium temperature range (-10°C to +100°C), the gas turbine flow meter provides accurate volumetric measurement at competitive cost. The pulse and 4–20 mA outputs integrate directly with energy monitoring systems and PLCs. The lithium battery option supports temporary installation on branch lines without routing power cable, enabling fast survey and audit deployments. Low pressure loss (0.1–2.5 kPa) means minimal impact on compressed air system pressure.

🔧 Nitrogen — Chemical & Industrial Supply Lines

The Challenge: Nitrogen purging, blanketing, and inerting systems in chemical processing and manufacturing require accurate flow monitoring to verify delivery rates and manage consumption costs.

Why This Meter: The gas turbine flow meter handles clean nitrogen supply lines within its operating conditions. The 304 stainless steel body and ABS or aluminum alloy impeller are compatible with clean nitrogen at line pressures covered by the DN25–DN250 flange connection range. RS485 and IC card outputs support integration with plant DCS and gas management systems. The wide turndown ratio (1:20 to 1:30 on larger diameters) accommodates the variable flow demands typical of purge and blanketing cycles.

🔧 Industrial Gases — Multi-Gas Factory Metering

The Challenge: Factories using multiple industrial gases need reliable, repeatable metering at each supply point for cost allocation, process control, and regulatory reporting.

Why This Meter: The Soaring gas turbine flow meter covers natural gas, air, nitrogen, and other clean industrial gases in a single product design, reducing the number of different meter types on site. Flange connections in DN25–DN250 accommodate most industrial supply line sizes. The Ex d IIB T6 Gb explosion-proof rating supports unified metering across areas where flammable gases are present, without needing separate zone-specific instruments.

How a Gas Turbine Flow Meter Works

The operating principle is mechanical and direct. Gas entering the pipeline strikes the blades of a multi-blade impeller (turbine rotor) mounted axially in the flow path on precision bearings. The rotor spins at a speed directly proportional to the average gas velocity through the pipe cross-section.

f = K × Q — where f = pulse output frequency (Hz), K = meter factor (pulses per cubic metre, determined by calibration), Q = volumetric flow rate at line conditions

A magnetic pickup sensor mounted on the outside of the pipe body detects each blade pass as an electrical pulse — no electrical contact with the gas is required. The transmitter counts pulses for instantaneous flow rate and cumulates totals. Because the K-factor is fixed at calibration by the meter geometry, the output carries no zero drift — even at the lower end of the flow range, pulse counts are reliable and do not accumulate error over time.

Key Performance Characteristics

• The meter responds to gas velocity, not mass or density — so normal variations in gas pressure and temperature at operating conditions do not affect the pulse output directly
• The pulse frequency output has strong anti-interference ability — suitable for direct connection to gas totalizers, batch controllers, PLCs, and SCADA without signal conditioning
• Medium and large diameter meters achieve a turndown ratio of 1:20 to 1:30, covering the full range from minimum to maximum flow with a single instrument — no range switching required
• The compact, lightweight structure makes installation and maintenance straightforward; the flange connection supports standard pipeline integration without special tools

Can We Meet Your Requirements?

Our Capabilities & Boundaries

WHAT WE DO:

• Accurate volumetric gas flow measurement for natural gas, air, nitrogen, and clean industrial gases — ±1.0%R standard
• Custody transfer and billing metering with zero-drift pulse output and long transmission distance (≤1000 m)
• Explosion-proof installations (Ex d IIB T6 Gb) in Zone 1 and Zone 2 hazardous areas
• Remote and off-grid installations with built-in lithium battery and external 24VDC dual power
• Integration with SCADA, DCS, gas totalizers, and billing systems via pulse, 4–20 mA, RS485, or IC card

WHAT WE DON’T DO:

• Wet, saturated, or condensate-carrying gas streams → upstream filtration required; confirm before ordering
• Gases with particles, dust, or solid contaminants → upstream filtration required; confirm before ordering
• Steam or high-temperature gases above 100°C → Use our vortex flow meter
• Liquid flow measurement → Use our liquid turbine flow meter

Ordering Information

Frequently Asked Questions

Get Your Custom Quote in 24 Hours

We supply gas turbine flow meters to process engineers, plant operators, and instrumentation distributors across 65+ countries. Whether you need a DN50 flange-type meter for a natural gas billing point, a DN150 unit for a compressed air main header, or an explosion-proof version for a Zone 1 gas distribution station, our engineering team will review your application and respond within 24 hours.

Related Resources

• Liquid Turbine Flow Meter — Product Overview
• Vortex Flow Meter
• Electromagnetic Flow Meter
• Ultrasonic Flow Meter
• Request a Quote