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Products // Variable Area Flowmeter  
AVF250 Series

The AVF250 Series flowmeter is commonly used in location that required on-site analog flow indication.
The meter accurately measures small volumes / wide ranges of liquids, gases and steam.

 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
 Heating jacket design
 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
+/-1.6% (Standard) Max. 600
+/-1.0% (Optional) Pulse Output:
Repeatability: Open collector (Scale pulse)
+/-0.5% FS Rating
Material: 3-30 VDC, 100 mA Max. 
Tube & Float Data Storage:
Stainless Steel 304 Operation parameters and totalizer
Stainless Steel 316 figures are stored by EEPROM for more
Stainless Steel 316L than 10 years
Stainless Steel + PTFE Liner Alarm Output:
Standard Pressure: 2 Point (Open collector)
40 kgf/cm2 (15-50 mm) Rating
16 kgf/cm2 (65-200 mm) 3-30 VDC, 100 mA Max.
Temperature: Keypad:
-25~200 oC (Standard) 3 Internal keys for programming
-25~100 oC (LCD Display) and display control
0~80 oC (PTFE Liner) Ambient Temperature:
-80~400 oC (Optional) -25~60 oC
Flange Type: Protection Class:
JIS 10K / JIS 20K / JIS 40K IP65
ANSI 150# / ANSI 300# / ANSI 600# Intrinsically Safe, Eex ia IIC T5
DIN PN10 / PN16 / PN25 / PN40 Explosion Proof, Ex d IIB T6
Fluid Viscosity: Housing Material:
300 cP Max. Aluminum Alloy
Communication: Cable Entry:
RS485 (MODBUS Protocol) Standard: M20  Option: 1/2"NPTF
HART signal (Compatible) Pressure Loss:
0.07-0.7 kgf/cm2
Power Supply:
12-36 VDC (2 wire 4-20 mA)
Ni-MH Battery (3 years working hours)

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