AVF250S Series -

Measuring liquids or gases
Local measurement, setting and monitoring of very low flow rates
LCD display with 4-20 mA output and HART communication
1/4″ NPTF, 1/2″ NPTF, Compression Fittings or Flange connection
Needle valve for flow regulation
High resistance to pressure and temperature
Flow regulators are used to provide constant flow rates in the case of variable inlet or outlet pressures

Size	:	10 mm
Measuring Range
Liquid	:	0.1-120 L/hr
Gas	:	1.6-3800 L/hr
Turndown Ratio	:	10:1
Accuracy	:	+/-4.0% FS (Standard)
	:	+/-2.5% FS (Option)
Repeatability	:	+/-1.0% FS
Material
Tube	:	Stainless Steel 316L
Float	:	Stainless Steel 316L or Titanium
Housing	:	Aluminum Alloy
Max. Pressure	:	100 kgf/cm²
Temperature	:	-25~150 °C
	:	-25~120 °C (LCD Display)
	:	20~150 °C (Flow Regulator)
Ambient Temperature	:	-25~60 °C
Viscosity	:	Max. 3 CP
Process Connection
Thread	:	1/4″ NPTF, 1/2″ NPTF
Compression Fittings	:	6 mm / 8 mm / 10 mm / 12 mm
Flange 15 mm	:	JIS 10K / JIS 20K / JIS 40K
	:	ANSI 150# / ANSI 300# / ANSI 600#
	:	DIN PN10 / PN16 / PN40

Local Display	:	Mechanical Indicator
Digit Display	:	5 Digits Flowrate
	:	7 Digits Totalizer
Keypad	:	3 internal keys for programming
		and display control
Current Output	:	4-20 mA (2-Wire)
Load	:	Rohm=(VDC-12) * 50 Ω
Limit Switches	:	2-Wire NAMUR
	:	3-Wire transistor
Power Supply	:	12-32 VDC
Protection Class	:	IP67
	:	Intrinsically Safe, Ex ia IIC T6
Communication	:	HART signal (Compatible)
	:	RS485 (MODBUS Protocol)
Data Storage	:	Operation parameters and totalizer
		figures are stored by EEPROM for
		than 10 years
Cable Entry	:	Standard: M16 * 1.5 Option: 1/2″ NPTF
Option	:	Flow Regulator / Valve
Position	:	On Inlet / On Outlet
Flow Regulator
Diaphragm Material	:	PTFE, P≤1.5 MPa, T≤70 °C
	:	Rubber, 1.5 MPa<p< span=””>≤4 MPa, T≤150 °C</p<>
	:	316L, 4 MPa<p< span=””>≤10 MPa, T≤150 °C</p<>