• Detection Range: 2 cm to 80 cm (adjustable in some models)

• Sensor Type: Infrared (IR) based proximity sensor

• Output:

     Digital: High (object detected), Low (no object)

     Analog : (in some models): Voltage varies with distance

• Operating Voltage: 3.3V to 5V DC

• Typical Current Usage: 10-20 mA

• Response Time: Fast (milliseconds)

• Adjustable Sensitivity: Some models include a potentiometer

• Detection Range: Up to 1 meter (varies with flame size and sensor quality)

• Detection Angle: Typically 60–120° (wide angle)

• Wavelength Sensitivity: 760 nm to 1100 nm (IR range of flames)

• Output:

       Digital: HIGH/LOW depending on flame presence

       Analog (in some versions): Varies with flame intensity

• Operating Voltage: 3.3V – 5V DC

• Response Time: Fast (milliseconds)

• Sensor Type: Infrared (IR) or Optical

• Common Modules: APDS-9960 (popular and widely used)  PAJ7620U2

• Functions: 

      Gesture detection 

      Proximity sensing Ambient light and colour sensing (in                   APDS-9960)

• Operating Voltage: 3.3V or 5V (depends on module)

• Communication Protocol: I2C (SDA/SCL)

• Measuring Range: pH 0 – 14

• Accuracy: ±0.1 to ±0.3 pH (depends on model)

• Output:

      Analog voltage (typically 0–5V, representing pH value)

      Some modules may use digital or serial output

• Operating Voltage: 5V DC (for common Arduino-compatible modules)

• Detection Range: Typically 3 to 7 meters

• Detection Angle: About 110° – 120°

• Operating Voltage: 4.5V – 20V DC (commonly used with 5V)

• Output Type: Digital (HIGH = motion detected, LOW = no motion)

• Delay Time & Sensitivity: Adjustable (in most models like HC-SR501)

• Temperature: 0–50°C (±2°C accuracy)

• Humidity: 20–90% RH (±5% accuracy)

• Output: Digital signal (single-wire communication)

• Operating Voltage: 3.3V to 5.5V

• Low Power Consumption

• Sampling Rate: 1 reading per second (1 Hz)