Water Flow Sensor

The Water Flow sensor measures the rate of a liquid flowing through it. The YF-S401 water flow sensor consists of a plastic valve body, flow rotor and hall effect sensor. It is usually used at the inlet end to detect the amount of flow. When liquid flows through the sensor, a magnetic rotor will rotate and the rate of rotation will vary with the rate of flow. The hall effect sensor will then output a pulse width signal. Connect it to a microcontroller and you can monitor multiple devices such as your coffee maker, sprinkler or anything else, and control the water flow rate to suit your needs!


1. Inner Diameter: 4 mm
2. Outside diameter: 7 mm
3. Proof Water Pressure: <0.8 MPa
4. Water Flow Range: 0.3-6 L/min
5. Voltage Range: 5~12 V
6. Operating Current: 15 mA (DC 5V)
7. Insulation Resistance:>100 MΩ
8. Accuracy: ±5% (0.3-3L/min)
9. The Output Pulse High Level: >4.5 VDC (DC input voltage 5 V)
10. The Output Pulse Low Level: <0.5 VDC (DC input voltage 5 V)
11. Output Pulse Duty Ratio: 50% ± 10%
12. Water-flow Formula: 1L=5880 square waves
13. Working Humidity Range: 35% ~ 90% RH (no frost)
14. Dimension: 58*35*26 mm/2.28*1.37*1.02 inches
15. Weight: 30g

LoRaWAN IO Controller

The LT series I/O Modules are Long Range LoRa I/O Controller. It contains different I/O Interfaces such as: analog current Input, analog voltage input, relay output, digital input and digital output etc. The LT I/O Modules are designed to simplify the installation of I/O monitoring. The LT I/O Controllers allows the user to send data and reach extremely long ranges. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimising current consumption.


1. STM32L072CZT6 MCU
2. SX1276/78 LoRa Wireless Chip
3. LoRaWAN Class A & Class C protocol
4. Optional Customized LoRa Protocol
5. Bands: CN470/EU433/KR920/US915
6. EU868/AS923/AU915
7. AT Commands to change parameters