Separate Amplifier Type Air Flow Sensor

FD-V40 series

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Amplifier Unit, Panel Mount Type, PNP FD-V45AP

FD-V45AP - Amplifier Unit, Panel Mount Type, PNP

*Please note that accessories depicted in the image are for illustrative purposes only and may not be included with the product.

Data Sheet (PDF)


CAD Data

360°view (3D PDF)

  • CE Marking
  • UL Recognition(c/us)






Current consumption.

At 12 V


1500 mW (125 mA) or less

Eco mode

1320 mW (110 mA) or less

At 24 V


2000 mW (83 mA) or less

Eco mode

1700 mW (70 mA) or less

Detection range

FD-A1: 30 to 1,000 mL/min (std)
FD-A10/A10AR: 0.3 to 10 L/min (std)
FD-A50/A50AR: 1.5 to 50 L/min (std)
FD-A100/A100AR: 3 to 100 L/min (std)
FD-A250: 7 to 250 L/min (std)
FD-A600: 18 to 600 L/min (std)

Display power

3 digit two-color 7-segment LED (Upper characters: red, Lower characters: green), Display Update Cycle: 5 times/sec.

Operation status indicators

Red LED x 2 (Control output 1/control output 2), Green LED (Integration display)


FD-A1: 1 mL
FD-A10/A10AR: 0.01 L
FD-A50/A50AR/A100/A100AR: 0.1 L
FD-A250/A600: 1 L



Response time (chatter prevention feature)

Select from HSP (5 ms), 0.02, 0.1, 1 and 5 seconds.

Integrated sampling cycle

30 ms

Integrated data memory

Writes in memory every minute

Accumulated flow unit

FD-A1: Selectable from 1, 10, 100, 1,000, 10,000 (mL)
FD-A10/A10AR: Selectable from 0.01, 0.1, 1, 10, 100 (L)
FD-A50/A50AR: Selectable from 0.1, 1, 10, 100, 1,000 (L)
FD-A100/A100AR: Selectable from 0.1, 1, 10, 100, 1,000 (L)
FD-A250/A600: Selectable from 1, 10, 100, 1,000, 10,000 (L)

Integration reset input

No-voltage input (with contacts, without contacts), Input time 20 ms min. (Analog output/selectable)

Control output/integration pulse output

PNP open collector Max. 100 mA. 30 V or lessResidual voltage 1 V or less, 2 outputs (N.O./N.C. selectable)Residual voltage 1 V or less, 2 outputs (N.O./N.C. selectable)

Analog output

4 to 20 mA, Maximum load resistance 260 Ω

Repetition accuracy

FD-A1/A10/A10AR/A50/A50AR/A100A/100AR: ±0.5 % of F.S. or less
FD-A250/A600: ±1 % of F.S. or less
(at the operating ambient temperature of 25 °C)


Power voltage

12 to 24 VDC, Ripple (P-P) 10 % or less

Environmental resistance

Ambient temperature

0 to +50 °C 32 to 122 °F (No freezing)

Relative humidity

35 to 85 % RH (No condensation)

Vibration resistance

10 to 55 Hz, Double amplitude 1.5 mm 0.06", 3 hours in each of the X, Y, and Z axis


Housing material: Polycarbonate, Key top: Silicon rubber


Panel mounting bracket, Front protection cover, Power cable, Instruction manual


Approx. 85 g (including panel mount bracket, front protection cover and power cable)

*1 The amplifiers, whose model names have "A" or "AP" in the end, are upgraded ones along with the supplementation of a new head. The old type of amplifiers, whose model names do not have "A" or "AP", cannot be used with the sensor heads other than FD-A10/A50/A100.

Data Sheet (PDF) Other Models