Yl105 Datasheet

If the YL105 does not meet your requirements, consider these alternatives based on your project’s needs:

| Sensor | Type | Key Difference | |--------|------|----------------| | A3144 | Unipolar Hall | Very common, similar to YL105’s IC | | SS495A | Linear Hall | Analog output, measures field strength | | US5881 | Unipolar Hall | Lower power consumption | | KY-024 | Module with analog output | Includes both DO and AO | | TLE4905 | Unipolar Hall | Higher temperature range |

| Feature | YL-105 (49E + LM393) | A3144 (Digital only) | Allegro A1302 (Pure analog) | |------------------------|-----------------------|----------------------|-------------------------------| | Output type | Analog + Digital | Digital (latching) | Analog only | | Resolution | Infinite (analog) | 1 bit | Infinite | | Polarity detection | Yes (North/South) | No (magnet presence) | Yes | | Cost | $1-2 | $0.50 | $2-3 | | Best for | RPM, linear position, proximity | Simple door switch | Precise current sensing | yl105 datasheet

A: They are functionally identical in most cases. The YL105 may have a slightly different PCB layout, but both use a unipolar Hall sensor and LM393 comparator.

While cost-effective, the YL-105 has distinct limitations that engineers must account for: If the YL105 does not meet your requirements,

The relationship between the sensor output and water quality is non-linear but predictable.

Below is a basic code structure for interpreting the data: | Feature | YL-105 (49E + LM393) |

const int sensorPin = A0;
void setup() 
  Serial.begin(9600);
void loop() 
  int rawValue = analogRead(sensorPin);
// Convert raw ADC (0-1023) to voltage (0-5V)
  float voltage = rawValue * (5.0 / 1024.0);
// Invert logic for intuitive reading (Higher value = Dirtier water)
  // This requires calibration against known samples.
Serial.print("Voltage: ");
  Serial.print(voltage);
  Serial.println("V");
delay(500);

The datasheet typically lists quiescent current around 5-10 mA (for the LM393 + Hall sensor). This makes it suitable for battery-powered projects if you power down the sensor between reads.

Unlike industrial Hall sensors (e.g., from Allegro or Melexis), the YL-105 datasheet provides no temperature coefficient data. In practice, the analog output will drift significantly with temperature (±10% or more across 0-50°C). For indoor hobby projects, fine. For outdoor or industrial use? Avoid.