| Model |
VN05 |
VN10 |
VN20 |
Accuracy Guaranteed Flow Rate Range
(Minimum flow rate – maximum flow rate) |
0.05 – 1 L/min |
0.5 – 10 L/min |
3.0 – 60 L/min |
| Maximum operating flow |
3 L/min |
25 L/min |
100 L/min |
| Low flow cut-off |
0.025 L/min |
0.25 L/min |
1.5 L/min |
Accuracy
(at fluid temperature of 25°C) |
Frequency pulse |
± 2.5 RS% (100% to 20% of maximum flow rate)
± 0.5 FS% (20% to 5% of maximum flow rate) |
| Unit pulse |
± 2.0 RS% (100% to 20% of maximum flow rate)
± 0.4 FS% (20% to 5% of maximum flow rate) |
| Piping connection (Screw size) |
R1/2 |
R1/2 |
R1 |
| Fluid temperature range |
0 to 60℃(Non-freezing) |
| Fluid conductivity range |
50 µS/cm or higher |
| Target liquids |
Conductive liquid that does not corrode the material exposed to it. |
| Operating pressure |
1 MPa or less |
| Pressure loss |
0.02 MPa or less |
| Ambient temperature and humidity |
Temperature: -20°C to 60°C
Humidity: 35% to 85% RH (Non-condensing) |
| Responsiveness |
63% response Damping time: 2 s (Standard) |
| Signal cables |
Length: 0.5 m, 4-wire
Red: Power + line
White: Output 1
Blue: Power – line (GND)
Yellow: Output 2 |
| LED displays |
One LED display on the sensor body
Green: Indicates flow rate with three scales of blinking speed.
Red: Indicates abnormal state with the number of blinks. |
| Installation position |
Free (Vertical piping is recommended.) |
| Output common specifications |
NPN open collector
Current capacity: 20: mA or less
Voltage: 30 VDC or less
Residual voltage when ON: 1 V or less |
| Output 1*2 |
Frequency pulse*1 |
Duty ratio |
Standard 200 Hz
(Can be configured by 0.1 Hz in the range between 20 and 400 Hz.) |
| Unit pulse |
0.001 L/P (Standard) |
0.01 L/P (Standard) |
0.1 L/P (Standard) |
| Alarm*3 |
Can be selected from normal open (Standard) or normal close.
Alarm contents (Power supply and voltage drops/ meter failure/ empty fluid/
excessive flow rate/ excessive flow noise/ reverse flow) |
| Switch*4 |
Can be selected from normal open (Standard) or normal close.
Level judgment value: Can be configured by 1% in the range of 0 – 100%.
(The maximum flow rate is converted to 100%.) |
| Output 2 *2 |
Unit pulse |
Same as output 1. |
| Alarm*3 |
Same as output 1. |
| Switch*4 |
Same as output 1. |
| Safety Class |
IP X4(IP 64 compatible) |
| Current Consumption |
100mA or less |
| Power Source |
Supply isolated power at 12 -24 VDC (±10%).
Use of one unit of power supply is recommended for one unit of VN. |
| Exposed materials to fluids |
Body: PPS resin
Electrodes: SUS 316 L
O ring: FKM
Grounding ring: SUS 316 |