Manufacturer, Exporter & Supplier of Process Control Instruments, Systems And Flameproof Electrical Equipments

Crystal Vision, since its inception in 2007, has delivered several high quality products to the industry. The company provides ONE STOP SOLUTION to all needs of Process Data Acquisition & Flameproof Electrical Equipments

Pressure Instruments, Temperature Instruments, Level Instruments, Flow Instruments, Flameproof / Weatherproof

DIGITAL VARIABLE AREA FLOWMETER

Features :

• Die Cast Aluminum enclosure WP to IP-55 or Flameproof suitable for Gas Gr. IIA & IIB.
• Line sizes from 15NB TO 150NB
• Digital display for flow rate
• 9V Battery / 24V DC operated
• Accuracy : ±1.5%

Optional features (With external Supply 24V DC)
• Output 4 to 20mA for flow rate
• Display for Total Flow

There’s No Alternative To Reliability
That’s why variable area flowmeters from Crystal offer not only the maximum possible accuracy but also maximum reliability.

Origin Of Metal Tube Rotameter
It operates on the principle of variable area; the fluid in the metal tube raised a float in the taper tube increasing the area of passage of fluid. The float moves up in proportion to the rate of flow of fluid and get stabilized when the weight of the float is balanced by the upward hydraulic force. By a magnetic coupling the inner float movement through a series of linkages and counter weight. The tube and the float combination determines the flowrate.

Digital Variable Area Flow Meter
The inner float magnetic field is detected by the high sensitive magnetic field detection sensor, enable us to show the digital readout. As such This flowmeter does not require any electrical connection, since it operates on battery. This got an inbuilt two wire transmitter just provide 24 VDC. And take 4 – 20 mA signal.

Benefits of CRYSTAL Variable Area Flowmeters
• Local indication without the need for auxiliary power.
• Minimum pressure losses. Easy to read.
• Accurate measurement even at higher flow (150 m3/hr).
• Suitable for low flow (8LPH) Default inbuilt transmitter of 4 – 20 mA (Loop powered).
• No movement assembly reducing the maintenance.

Maximum Flow And Pressure Loss

Line Size NB	20^oC. water flow m3/hr	0^oC. 1 atm Air flow Nm3/hr	Approx. Pressure Loss mm WC
15	0.2 – 1. 2	6 – 35	200 – 225
20	0.4 – 2. 0	8 – 60	220 – 230
25	1 – 5	30 – 150	200 – 270
40	2.5 – 10	70 – 300	200 – 250
50	3.5 – 17	100 – 500	225 – 260
65	6 – 30	200 – 900	225 – 240
80	10 – 45	300 – 1200	225 – 260
100	20 – 100	600 – 3000	350 – 700
125	30– 120	900– 4000	300– 850
150	30– 150	900– 4500	35– 950

Technical Specification
Accuracy	± 1.5% of FSR.
Range ability	10 : 1
Repeatability	± 0.25% of FSR
Temperature Rating	-50 to 120^oC.
Pressure Rating	80 kg/cm2
Flow Direction	Bottom to Top
End connection	Flanged to suit customer’s requirement.
Wetted Part	To suitable specific liquid or gases.
Mounting position	Vertical
Indication	Digital flow rate
Transmission	2 wire loop powered
Enclosure	Flameproof / weatherproof
Power supply	9 VDC battery