GLW series pipeline flow sensorDetailed product description：

The GLW80/100/150/200/250/300 pipeline flow sensor (hereinafter referred to as the sensor) is an intrinsic safety instrument suitable for monitoring the flow rate of gas drainage pipelines under standard conditions in coal mines or on the ground.
The composition of the sensor is: flow sensor host, KKF83 series vortex flowmeter (hereinafter referred to as flowmeter).
The sensor host circuit is designed with a microcontroller, which can display instantaneous flow values locally and output frequency or current signals for remote acquisition; Can remotely adjust zero point and amplification factor, and has fault self checking function; Alarm points, power-off points, and power restoration points can be set up for convenient user operation.
The flowmeter adopts digital signal processing technology (DSP) in the signal processing circuit, and is designed with a 14 stage digital bandpass filter. Through the fast Fourier software algorithm, the signal detection sensitivity of the vortex street is improved, the anti vibration performance of the instrument is enhanced, and the limitations of traditional simulation methods for processing vortex street signals are overcome.

The model definition of the product is as follows:
For example:

Technical characteristics of GLW series pipeline flow sensor
1) Applicable conditions
Environmental temperature: 0 ℃~40 ℃;
Relative humidity: ≤ 96% RH;
Atmospheric pressure: 86 kPa to 106 kPa;
Can be used in environments with explosive gas hazards underground in coal mines.
2) Main technical indicators
Measurement medium: liquid;
Medium pressure: ≤ 1.0 Mpa;
Medium temperature: -40 ℃ to+250 ℃;
Flow velocity range: 0.5-5.0 m/s;
Measurement range:
DN80：9m3/h～90 m3/h；
DN100：14.1 m3/h～141m3/h；
DN150：31.7m3/h～317m3/h；
DN200：56.5 m3/h～565m3/h；
DN250：120 m3/h～883 m3/h；
DN300:192 m3/h～1270 m3/h；
Accuracy level: 1.5 level;
The basic measurement error, linearity, and repeatability all meet the accuracy requirements of level 1.5;
Signal output:
DN80: Linear correspondence of 0.0 m3/h to 90.0 m3/h between 200 Hz and 1000 Hz;
DN100: Linear correspondence of 0.0 m3/h to 150 m3/h between 200 Hz and 1000 Hz;
DN150: Linear correspondence of 0.0 m3/h to 360 m3/h between 200 Hz and 1000 Hz;
DN200: Linear correspondence of 0.0 m3/h to 600 m3/h between 200 Hz and 1000 Hz;
DN250: Linear correspondence of 0.0 m3/h to 900 m3/h between 200 Hz and 1000 Hz;
DN300: Linear correspondence of 0.0 m3/h to 1500 m3/h between 200 Hz and 1000 Hz;
Signal load capacity: 0~1 k Ω within 2 km (rated voltage DC 18V);
Response time: ≤ 30 seconds;
Reynolds number: normal 2 × 104~7 × 106 (extended 1 × 104~7 × 106);
Resistance coefficient: Cd ≤ 2.4;
Allowable vibration acceleration: ≤ 1.0 g;
Operating voltage of the whole machine: 12.0 V.DC~24.0 V.DC;
Explosion proof grade: ExibI;
Explosion proof form: mining intrinsic safety type.
3) Display function
Four red digital displays
First digit (small digital tube): does not display in normal state;
During remote calibration, display: 0- zero calibration point; 1. Adjust the magnification factor; 2. Adjust the alarm point; 3. Power off point adjustment; 4- Adjust the electrical point; 5- Self inspection;
6- Observe the AD sampling voltage; 7-Self inspection point;
8-Sensor host reset
Last three digits: Measurement value display, unit: m ³/h.
4) External features
Sensor host housing material: SMC
Sensor host shell color: black
Flow meter body material: 304 stainless steel
Flow meter probe material: 316L

Selection of GLW series pipeline flow sensors
1. Main specifications and models of flow sensors

name		model	Specification	Upper limit of traffic measurement (Unit cubic meter/hour)
flow sensor	host	GLWXX/YY	—	—
	Vortex probe pipe fittings Nominal Diameter	XX=80	DN80	YY=90.0
		XX=100	DN100	YY=141
		XX=150	DN150	YY=317
		XX=200	DN200	YY=565
		XX=250	DN250	YY=883
		XX=300	DN300	YY=1270