This flowmeter operates on the basis of the magnetic effect, it feeds at voltages between 5 and 18 V (DC) and is easy to use - it counts the pulses obtained at the output.
The water flow sensor is mainly composed of a plastic valve body, a water flow rotor assembly and a Hall sensor.
It is installed at the water inlet end of the water heater to detect the influent flow rate as it passes through the water flow rotor assembly.
The magnetic rotor rotates and the rotational speed changes with the flow rate and the Hall sensor outputs a corresponding pulse.
The signal is fed back to the controller, and the controller determines the magnitude of the water flow and performs regulation.
The sensor has three connections, two for power supply and one output (yellow). Flow rate can be easily calculated, a pulse is approximately 2.25ml. If it is positioned and calibrated correctly, the accuracy of approximately 10%.
Calculation formula: Flow rate (l / min) = Frequency (Hz) /7.5.
• Sensor type: Hal effect
• Working voltages: 5 - 18V DC
• Current: 15mA to 5V
• Exit: 5V TTL
• Flow rate: 1 - 30 l / m:
• Working temperatures from -25oC to + 80oC
• Humidity Accepted Conditions: 35% - 80% RH
• Accuracy: ± 10%
• Maximum water pressure: 2.0 MPa
• Output filling factor: 50% + -0%
• Exit rise time: 0.04us
• Down Time Output: 0.18us
• Pulses / liter: 450
• Minimum lifetime of 300,000 cycles
• Cord length: 15cm
• 1/2 "tube connections, 0.78" outer diameter
• Dimensions: 2.5 "x 1.4" x 1.4 "
1. This product is light and flexible in appearance, small in size and easy to install.
2. The impeller is internally set with a stainless steel shaft and is always wear-resistant.
3. The sealing ring adopts the upper and lower force structure and never leaks.
4. The Hall element is imported from Germany and is encapsulated with potting glue to prevent water from entering and never aging.
5. all raw materials have met ROHS testing standards
• Severe impact and chemical attack are strictly prohibited.
• It is strictly forbidden to throw or collide.
• Install vertically, with a slope of no more than 5 degrees.
• The medium temperature should not exceed 1200C.
Output waveform diagram: square wave NPN pulse signal
1. red IN is connected to the positive pole
2. yellow OUT signal output line
3. black GND connected to the negative
YF-S201 frequency: F=7.5*Q(L/Min) Error: ±2% Voltage: 3.5-24VDC, current can not exceed 10mA, output 450 pulses after one liter of water
That is, frequency calculation = constant 7.5 * unit flow rate (L / min) * time (seconds)
Flow range: 1-30L/min
| Scope of application: | Suitable for water heaters, credit card machines, automatic water vending machines, and other flow metering equipment! | |
base this Reference number |
1. the lowest-rated working voltage | DC4.5 5V-24V |
| 2. the maximum working current | 15 mA (DC 5V) | |
| 3. working voltage range | DC 5~18 V | |
| 4. load capacity | ≤10 mA (DC 5V) | |
| 5. the use of temperature range | ≤80°C | |
| 6. the use of humidity range | 35% to 90% RH (no frosting) | |
| 7. allow pressure | Water pressure below 1.75Mpa | |
| 8. save the temperature | -25～+ 80°C | |
| 9. save humidity | 25% to 95% RH | |
This product is mainly used in water heaters, water dispensers, automatic water vending machines, credit card machines, etc.
Product wiring: red +, black -, yellow for pulse signal output
Output signal: NPN pulse signal
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