Home > Products > Electronics & Electricity > Electronic Instrument > Analysis Instrument

Industrial Air Flow Meter LWQZ

Widely used in the measurement gas, coal gas, liquefied petroleum gas, light hydrocarbon gas and other gases

Measuring media: gas

Range: standard range: 2.5-4000m³ / h extended range: 4-6500m³ / h

Output signal: pulse signal, 4-20mA current signal, control signal

Accuracy class: ± 1.5% R (± 1% R special needs)

Medium temperature: -20 ℃ ~ + 80 ℃

Explosion levels: ExdⅡBT6 or ExiaⅡCT4

Protection: IP65

Product Overview LWQ series gas turbine flowmeter flow meter is learned at home and abroad advanced technology to optimize the design, synthesis gas mechanics, fluid mechanics, electromagnetic theory and developed a set of temperature, pressure, flow sensor and intelligent flow totalizer to one of the new generation of high-precision, high reliability gas precision measuring instruments, with excellent low and high pressure metering performance, a variety of signal output and low sensitivity to disturbance of the fluid, is widely used in natural gas, coal gas, liquefied petroleum gas, metering light hydrocarbon gas and other gases.

The product by the national explosion-proof product quality inspection departments according GB3836.2000 "explosive gas atmospheres Electrical Equipment Part 1: General requirements", GB38362.2-2000 "Electrical apparatus for explosive gas atmospheres Part 2: Flameproof" d " "and GB3836.4-2000" electrical apparatus for explosive gas atmospheres part 4: Intrinsic safety "i" "standard inspection, proof mark ExdⅡBT6 (flameproof), EiaⅡCT6 (intrinsically safe). Suitable for containing ⅡA, ⅡB, 0 (intrinsically safe only) ⅡC temperature class T1 ~ T6 group explosive gas mixture of 1,2 dangerous places.

Product Features

Using the new sensors, low starting flow, pressure loss, anti-vibration and anti-pulsating flow properties and difficult to corrosion, reliability and long service life;

Using the new microprocessor and high-performance integrated chip, high-precision arithmetic, the whole powerful, superior performance;

The use of advanced high-tech micro-power, low power consumption machine. Both long-run supply with battery, can be operated by an external power supply;

By traffic frequency signals can be divided eight automatic meter factor linearity correction, it may be desirable to improve the accuracy of the instrument according to the user;

It uses EEPROM data storage technology, with storage and query historical data, three historical data recording modes to choose from;

Flowmeter meter head can be rotated 180 °, easy to install and use;

High accuracy, generally up to ± 1.5% R, ± 1.0% R;

Good repeatability, short-term repeatability of up to 0.05% to 0.2%, it is due to good reproducibility, in trade settlement is the preferred flow meter;

Can be detected by detecting the gas temperature, pressure and flow rate, the flow can be compensated automatically track and display the standard state (Pn = 101.325KPa, Tn = 293.15K) gas flow rate: real-time check the temperature, pressure, time, date, etc. data.

Technical Parameters

Implementation of standards

Measurement of gas flow in closed conduits - A gas turbine flowmeter (GB / T8940-2003)

Meter diameter (mm) and connections:

 20,25,32,40,50,65,80,100,125,150,200,250,300 flange connection

 25,40,50 can be screwed

Accuracy class: ± 1.5% R (± 1% R need special) *

Turndown ratio: 1:10; 1:20; 1:30

Instrumentation Material

 Body: 304 stainless steel or cast aluminum

 Impeller: ABS or high quality aluminum alloy corrosion

 Converter: Aluminum

Conditions of Use

 Medium temperature: -20 ℃ ~ + 80 ℃

 Ambient temperature: -30 ℃ ~ + 60 ℃

 Relative humidity: 5% to 90%

 Atmospheric pressure: 86Kpa ~ 106Kpa

Power supply

 A. external power: + 24VDC ± 15%, ripple ≤ ± 5%, applicable to 4-20mA output, pulse output, RS485, etc.

 B. Power within: Group 1 3.0V10AH lithium battery, the battery voltage can work in 2.0V ~ 3.0V when.

 Undervoltage indication when the voltage is less than 2.0

Overall energy consumption: External power: <1W

 Inner power: average power consumption ≤ 1W, it can be used continuously for more than three years.

Signal output: Pulse signal, 4-20mA current signal, control signal

Communication output function: RS485 communication

Real-time recording function 

 Start and stop recording, recording date, recording a given time interval

Signal wiring port

 Internal thread M20 × 1.5 or other

Explosion levels: ExdⅡBT6 or ExiaⅡCT4

Protection class: IP65