水流量感測器 / 流量計

4分管，G1/2外牙，一字型結構，尼龍加玻纖，防水防爆，耐熱耐冷，可用來偵測水流計量流量。

三線聯接：紅色為正極，黑色為負極，黃色為脈衝信號，最大壓力1.75mpa、流量1-30L/分如果要加溫度控制傳感器則為綠色，也可另接兩線專門控制溫度。

水流量傳感器主要用於燃氣熱水器、電熱水器、洗衣機、售水機、壁掛爐、電磁熱水器、水控（一體式）機、控水機、熱泵熱水工程、一卡通管理系統、智能水錶IC水錶、校園卡售水系統、自助售水（販賣）機、水處理設備、配水配藥設備、冷卻系統、循環系統、智機械設備、加熱設備、儀器儀表、製藥（制濟）設備等。

【產品規格】

尺寸：58*38*38mm
顏色：Black
最大流體壓力：1.75 MPa
最大流量：30 L/min
線長：10 CM
管接頭管徑：1.9 cm Outer Dia, 1.1cm Inner Dia

【文件下載】 

需要的物品

Arduino控制板、10K電阻、水流量感測器

教學

你需要上傳以下程式碼到你的控制板(如UNO)。上傳之後，當有流體流過水流感測器，您就可以打開Arduino serial monitor，上面將會顯示流量，並且每秒刷新一次。

程式碼

// reading liquid flow rate using Seeeduino and Water Flow Sensor from Seeedstudio.com
// Code adapted by Charles Gantt from PC Fan RPM code written by Crenn @thebestcasescenario.com
// http:/themakersworkbench.com https://thebestcasescenario.com https://seeedstudio.com

volatile int NbTopsFan; //measuring the rising edges of the signal
int Calc; 
int hallsensor = 2; //The pin location of the sensor

void rpm () //This is the function that the interupt calls 
{ 
NbTopsFan++; //This function measures the rising and falling edge of the 

hall effect sensors signal
} 
// The setup() method runs once, when the sketch starts
void setup() //
{ 
pinMode(hallsensor, INPUT); //initializes digital pin 2 as an input
Serial.begin(9600); //This is the setup function where the serial port is 

initialised,
attachInterrupt(0, rpm, RISING); //and the interrupt is attached
} 
// the loop() method runs over and over again,
// as long as the Arduino has power
void loop () 
{
NbTopsFan = 0; //Set NbTops to 0 ready for calculations
sei(); //Enables interrupts
delay (1000); //Wait 1 second
cli(); //Disable interrupts
Calc = (NbTopsFan * 60 / 7.5); //(Pulse frequency x 60) / 7.5Q, = flow rate 

in L/hour 
Serial.print (Calc, DEC); //Prints the number calculated above
Serial.print (" L/hourrn"); //Prints "L/hour" and returns a new line
}
"