Liquid Flow Sensor

Sensor Specifications

FS100A

Flow rate: 0.15 ~ 2.5L/Min
Working voltage: +3.3V ~ +24V
Working temperature: -10ºC ~ 120ºC
Pulse number: 3900 pulses/liter
Inlet pipe size: 2mm
Outlet pipe size: 4mm
Accuracy: ±0.5%
Max rated current: 8mA

FS200A:

Flow rate: 0.5 ~ 25L/Min
Working voltage: +3.3V ~ +24V
Working temperature: -10ºC ~ 120ºC
Pulse number: 450 pulses/liter
Pipe connection: ½’’
Accuracy: ±1%
Max rated current: 8mA

FS400:

Flow rate: 1 ~ 60L/Min
Working voltage: +3.3V ~ +24V
Working temperature: -10ºC ~ 120ºC
Pulse number: 390 pulses/liter
Pipe connection: 1’’
Accuracy: ±2%
Max rated current: 8mA

Measurement Process

The liquid flow sensors included in the Smart Metering 2.0 Board output a signal that consists of a series of digital pulses whose frequency is proportional to the flow rate of the liquid through the sensor. That digital signal, whose frequency is in the range between 0Hz and 100Hz, is directly read through one of the digital input/output pins of the microcontroller.
Liquid Flow Images

FS100A

FS200A

FS400

Illustration