Kofloc VN Series Compact Electromagnetic Flowsensor

VN Series is an electromagnetic flow sensor designed for small pipe diameter and low flow.

Features

• Electromagnetic flow sensor without moving parts suitable for use in machines.
• With absence of moving parts, there is less failure due to its contaminants.
• Low-pressure loss
• No straight pipe required, compact design, and easy to install.

Specification

Model		VN05R	VN10R	VN20R
Nominal Diameters		5mm	10mm	20mm
Accuracy-Guaranteed Flow Range		0.05～1L/min	0.5～10L/min	3.0～60L/min
Maximum Operating Flow Rate		3L/min	25L/min	100L/min
Low Flow Cutoff		0.025L/min	0.25L/min	1.5L/min
Accuracy (Liquid Temp. at 25℃)	Frequency Pulse	±2.5%RS (20% ~ 100% of maximum flow rate) ±0.5%FS (5% ~ 20% of maximum flow rate) *1
	Unit Pulse	±2.0%RS (20% ~ 100% of maximum flow rate) ±0.4%FS (5% ~ 20% of maximum flow rate) *1
Type of Fluid		Conductive fluid that does not corrode the material contacting to fluid (ex. cold/hot water)
Fluid Conductivity Range		50μS/cm or more
Fluid Temperature Range		0～+60℃ (No freezing)
Ambient Temperature / Humidity		Temperature: -20～+60℃ Humidity: 35～85％RH (No condensation)
Storage Ambient Temperature Range		-20～+70℃
Working Pressure		1MPa or less
Pressure Loss		20kPa or less
Output 1 *3	Spec. of Output	NPN open collector Current capacity: 20mA DC or less / Voltage: 30V DC or less / ON-time residual voltage: 1V or less Minimum pulse ON-time 2.5 ms (at 200 Hz frequency pulse) Duty ratio: 50%
	Frequency Pulse *2	Standard 200.0Hz (Settable in steps of 0.1Hz between 20 and 400Hz upon delivery) Note: When connecting ASI-100, select 200.0 Hz for output 1.
	Unit Pulse	0.001L/P (Standard)	0.01L/P (Standard)	0.1L/P (Standard)
	Alarm *4	Selectable between Normal Open (Standard) and Normal Close Details of alarm (Excitation error / Memory error / Low source voltage / Dry moisture / Excessive fluid noise / Excessive flow rate / Reverse flow)
	Switch	Selectable between Normal Open (Standard) and Normal Close
Output 2 *3	Spec. of Output	Same as Output 1
	Unit Pulse	Same as Output 1
	Alarm *4	Same as Output 1 Note: When connecting ASI-100, select Alarm for output 2
	Switch	Same as Output 1
Response *3		63％ response Dampling time: 2s (Standard) Settable in steps of 1s from 1~99s upon delivery
Cable		Cable length: Approx. 500mm 4 core AWG28 Outer diameter: φ2.8 with a shield
LED Display		One LED display in the main body Green: Flow rate display in 3-step speed Red: NG status is displayed with number of blinks
Installation Position		Free (Air intrusion shall be avoided.)
Piping Connection		R1/4	R1/2	R1
Protection Level		Indoor use (Equivalent to IP65.)
Power Supply *5		12～24V DC±10%
Consumption Current		100mA DC or less
Weight		Approx. 190 g	Approx. 190 g	Approx. 290 g
Wetted Materials	Body Case	PPS
	Electrode	SUS316L
	Earth Ring	SUS316
	O-Ring	FKM

*1：Accuracy is guaranteed value of average value accumulated for 240s.
 

*2：Indicates the frequency at the maximum guaranteed flow rate.
 

*3：For the set value and choice of Output 1 and Output 2, all are factory setting. The setting cannot be changed after installation.
 

*4：Alarm is selectable only either one of Output 1 or Output 2.
 

*5：Using isolated power supply and connecting one power supply device per VN flow sensor are recommended

Download Datasheet: Kofloc VN Electromagnetic Flow Meter