Compressed Air Flowmeter from China Manufacturer - Aister Instrument (Shanghai) Co., Ltd

Introduction Features Specifications Model Selection Application Installation

Introduction

The compressed air flowmeter is mainly used to measure the air flow rate compressed by external force. Air has compressibility, and the air after the air compressor does mechanical work to reduce its volume and increase its pressure is called compressed air. Compressed air is an important power source. Compared with other energy sources, it has the following obvious characteristics: clear and transparent, easy to transport, no special harmful properties, no risk of fire, not afraid of overload, can work in many adverse environments, air is everywhere on the ground, inexhaustible.

Compressed air has the characteristics of large vibration, gas with water, including pulsating flow, etc. Not all measuring methods or measuring instruments are suitable, so it is necessary to choose the appropriate measuring method and flow meter according to the characteristics of compressed air itself, measurement requirements and different conditions of use.

Commonly used flowmeters for measuring compressed air: Vortex flowmeter、Precession vortex flowmeter、Thermal gas mass flowmeter。Aister staff to “Only choose the right, not the expensive”for the purpose of selection, quotation for customers.

Features

Thermal gas mass flowmeter, but the equipment has certain limitations in use, the measured air can not contain water, must be installed with water and gas separation equipment;

Precession vortex flowmeter, built-in temperature and pressure compensation, low flow limit, small gas consumption can also be measured, but not suitable for measuring large diameter large flow pipeline.

Fractional vortex flowmeter, when measuring compressed air, need to install vortex flowmeter, pressure transmitter, temperature sensor, flow integrator several equipment, complex structure, cumbersome installation, high cost.

Temperature and pressure compensation vortex flowmeter, built-in temperature and pressure sensor, simple structure, easy installation, high precision characteristics.

Compressed air flow meter selection: More than 20 years of experience in the instrument and meter industry engineers, to provide gas flow measurement solutions and professional selection.

Specifications

Parameter/instrument category	Vortex flowmeter	Precession vortex flowmeter	Thermal gas mass flowmeter
Nominal diameter	DN25-DN300mm	DN20-DN200mm	DN10～DN2000mm
Accuracy	Level 1.0, level 1.5	1.0~1.5%	±1～2.5%
Working pressure	1.6/2.5/4.0Mpa	1.6Mpa,2.5Mpa,4.0Mpa,6.3Mpa	2.5Mpa 4.0Mpa
Medium temperature	-40℃～+350℃	Medium temperature：-20℃~+80℃	sensor：-40℃～+220℃ convertor：-20℃～+45℃
Output signal	Three-wire voltage pulse, low level 0 ~ 1V, high level > 4V, duty cycle 50%; Two-wire system standard current 4 ~ 20mA; Three-wire system standard current 0 ~ 10mA	4-20mA, pulse output, RS485, alarm output	4-20mA (photoelectric isolation, large load 500Ω), pulse, RS-485 (photoelectric isolation), HART protocol
Working power supply	DC12V；DC24V	24VDC+3.6V battery powered, removable battery	DC24V or AC220V≤18W
Installation mode	Flange type, clamp type, insert type, clamp type	Flange type	Flange type, insert type
Explosion-proof type	Intrinsic safety type ExibIICT6	ExiaIIT6Ga	ExibIICT6

Model Selection

01 Measure the medium, temperature, whether there is corrosion

02 Flow range and inside diameter of user pipe

03 Pressure rating

04 Whether to show on site

05 Working power supply

06 Signal output, communication

07 Whether to explosion-proof

08 Installation mode

09 Accuracy

Application

Industrial process

Energy measurement

Environmental protection engineering

Transportation

Biotechnology

Scientific experiment

Marine meteorology

Rivers and lakes

Installation

For matters needing attention in installation of compressed air flowmeter, please click View as required:

Vortex flowmeter installation precautions

Precession vortex flowmeter installation precautions

Hot gas mass flowmeter installation precautions

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