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Products // Variable Area Flowmeter  
AVF250H Series

The AVF250H Series is a horizontally mounted metal tube variable area flowmeter. With its unique design,it can provide a mechanical pointer display without power supply, as well as intrinsically safe and explosion-proof to suit various operating conditions.

 Spring type horizontal mounted metal tube flowmeter  
 5 digit flowrate & 8 digit totalizer  
 Local indication without auxiliary power  
 4-20 mA & scale pulse output  
 Low pressure loss in gas and steam application  
 Damper for Gas / Steam application  
 Consistent overall length  
 Intrinsically safe & explosion proof for hazardous area  


Size: Local Display:
15,20,25,40,50,65,80,100,125,150,200 mm Mechanical Indicator (Standard)
Measuring Range: Digit Display
Liquid -1~200000 L/hr 5 Digit Flowrate
Gas -0.03~3000 m3/hr 8 Digit Totalizer
Turndown Ratio: Current Output:
10:1 (20:1 Optional) 4-20 mA (2 Wire)
Accuracy: Load
+/-2.5% (Standard) Max. 600
+/-1.5% (Optional) Pulse Output:
Repeatability: Open collector (Scale pulse)
+/-0.8% FS Rating
Material: 3-30 VDC, 100 mA Max. 
Tube & Float Alarm Output:
Stainless Steel 304 2 point (Open collector)
Stainless Steel 316 Rating
Standard Pressure: 3-30 VDC, 100 mA Max.
40 kgf/cm2 (15-50 mm) Keypad:
16 kgf/cm2 (65-200 mm) 3 internal keys for programming
Temperature: and display control
0-100 oC (Standard) Ambient Temperature:
Flange Type: 0-60 oC
JIS 10K / JIS 20K / JIS 40K Protection Class:
ANSI 150# / ANSI 300# / ANSI 600# IP65
DIN PN10 / PN16 / PN25 / PN40 Intrinsically Safe, Eex ia IIC T5
Fluid Viscosity: Explosion Proof, Ex d IIB T6
300 CP Max. Housing Material:
Communication: Aluminum Alloy
RS485 (MODBUS Protocol) Cable Entry:
HART signal (Compatible) Standard:M20  Option:1/2"NPTF
Data Storage: Pressure Loss:
Operation parameters and totalizer 0.07-0.7 kgf/cm2
figures are stored by EEPROM for more Power Supply:
than 10 years 12-36 VDC (2 wire 4-20 mA)
Ni-MH Battery (3 years working hours)

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