• SS49E Datasheet

// -------------------------------------
// 49E Hall Effect Sensor - Code Example
// -------------------------------------
 
const int pinHall = A0; 
void setup() {
  pinMode(pinHall, INPUT);
  Serial.begin(9600);
} 
void loop() {
 
  //we measure 10 times adn make the mean
  long measure = 0;
  for(int i = 0; i < 10; i++){
      int value = 
      measure += analogRead(pinHall);
  }
  measure /= 10;  
  //voltage in mV
  float outputV = measure * 5000.0 / 1023;
  Serial.print("Output Voltaje = ");
  Serial.print(outputV);
  Serial.print(" mV   ");
 
  //flux density
  float magneticFlux =  outputV * 53.33 - 133.3;
  Serial.print("Magnetic Flux Density = ");
  Serial.print(magneticFlux);
  Serial.print(" mT");  
  delay(2000);
}

• Model : KY-003
• Operating Voltage : 5 VDC
• Supply Voltage, VCC : 28 V
• Reverse Battery Voltage, VRCC : -35 V
• Magnetic Flux Density, B : Unlimited
• Output OFF Voltage, VOUT : 28 V
• Reverse Output Voltage, VOUT : -0.5 V
• Continuous Output Current, IOUT : 25 mA
• Operating Temperature Range : -40°C to 85°C
• Storage Tempereture Range : -65°C to 170°C
• Length : 19mm
• Width : 15mm

• 4.5 V to 24 V Operation … Needs Only An Unregulated Supply
• Open-Collector 25 mA Output … Compatible with Digital Logic
• Reverse Battery Protection
• Activate with Small, Commercially Available Permanent Magnets
• Solid-State Reliability
• Small Size
• Resistant to Physical Stress

• 3144_hall_datasheet.pdf
• oh44e-e_sensore-hall.pdf
• https://github.com/R2D2-2017/R2D2-2017/wiki/Keyes-44E402-Magnetic-Hall-Switch-Sensor