YF-S201 Flow Sensor - 1-30 L/min, G1/2, Hall effect
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Description
Product Overview
- Sensor measures water flow in the range of 1 to 30 liters per minute
- G1/2 thread for direct pipe connections
- Hall-effect sensing, non-contact and wear-free
- Pulse output for digital counting and flow rate calculation
- 5 V logic level for direct connection to microcontrollers
- Internal thread and compact design for tight installation spaces
Product Description
The flow sensor operates on the Hall effect principle and counts the water flowing through its housing. An internal impeller rotates with the water flow, and a magnetic field triggers a Hall sensor with each rotation. The sensor outputs one or more pulses per liter as a digital signal that microcontrollers can process directly.
With its G1/2 threaded block, the sensor fits standard pipes and does not require compressor connections. Its measuring range of 1 to 30 liters per minute covers both low-flow applications and medium flow rates. The pulse frequency is proportional to the flow rate, so counting the pulses makes it possible to determine the volume of water that has flowed through over any time interval.
The sensor is suitable for rainwater storage systems where the volume collected needs to be monitored, as well as garden irrigation systems, aquarium monitoring, and use as a meter in laboratory experiments. One possible application is triggering an alarm when a specified volume of water is exceeded, for example to protect against pipe bursts or limit water costs.
The sensor requires an external 5 V power supply and outputs signals at a 5 V level. Readout requires an input with pulse-counting functionality or a microcontroller interrupt; the pulse frequency and number of pulses per liter must be determined from the datasheet or by measurement, as they may vary slightly depending on the flow rate. Measurements below 1 liter per minute are unreliable.
Safety Notice
The sensor is intended exclusively for building prototypes and for testing and development purposes. It must not be used in domestic water pipes connected to the municipal water supply, in high-pressure systems, or for drinking water monitoring. If you are unsure whether it is suitable for a planned application, consult a qualified electrician before installation.
Package Contents
- 1x YF-S201 Water/Flow Sensor - 1-30L/Min, G1/2, Hall effect