Electric Sensors

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The MQ-3 is a low-cost, alcohol-sensitive semiconductor gas sensor widely used for detecting alcohol and ethanol vapor concentrations in the air. The sensor's sensitivity can be adjusted, and it is suitable for integration with microcontrollers like Arduino and Raspberry Pi. Working principle The MQ-3 sensor uses a tin dioxide (SnO2cap S n cap O sub 2������2) sensing element to detect alcohol in the air. 

• The SnO2cap S n cap O sub 2������2 has low conductivity in clean air.
• The sensor contains a heater that raises the temperature of the SnO2cap S n cap O sub 2������2 layer, which absorbs oxygen from the surrounding air.
• When the sensor detects alcohol vapor, the alcohol reacts with the SnO2cap S n cap O sub 2������2, which increases the material's conductivity.
• This change in conductivity is then converted into an output signal that correlates with the alcohol concentration. 

Specifications Specifications for the MQ-3 gas sensor can vary slightly based on the manufacturer and the module it's integrated into. A typical 4-pin module has the following characteristics: 

• Operating Voltage: 5V DC
• Detecting Gas: Alcohol (Ethanol), with some sensitivity to benzene, methane, and smoke.
• Detection Concentration: 0.05 mg/L to 10 mg/L of alcohol.
• Response Time: Less than 10 seconds.
• Outputs: Provides both analog (AOUT) and digital (DOUT) outputs.
• Preheat Time: Some datasheets suggest up to 48 hours for high-precision measurement, though shorter times (around 30 minutes) are sufficient for most hobbyist projects. 

Pinout The standard 4-pin MQ-3 module typically has the following pins: 

• VCC: Power supply input (usually +5V).
• GND: Ground connection.
• AOUT: Analog output pin, providing a voltage proportional to the gas concentration.
• DOUT: Digital output pin, which is triggered when the gas concentration exceeds a threshold set by an onboard potentiometer. 

Applications The MQ-3 sensor is primarily used in alcohol detection systems and hobbyist projects. 

• Breathalyzers: Used in portable alcohol detection devices.
• Gas Level Alarms: Can be incorporated into systems that trigger an alarm when a set alcohol level is exceeded.
• Environmental Monitoring: Utilized in equipment to monitor for alcohol emissions.
• Industrial Process Control: Employed in industrial applications to monitor alcohol levels.
• DIY and Educational Projects: An excellent component for beginners to learn about gas sensing with microcontroller platforms like Arduino. 

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We are the leading organization actively occupied in providing an extensive series of HC SR04 Ultrasonic Module. This product is presented in numerous of specifications.

The HC-SR04 is a popular, low-cost ultrasonic sensor module used for non-contact distance measurement. It works on the principle of echolocation and is a favorite for hobbyists and educational projects due to its simplicity and affordability. The module includes a transmitter, a receiver, and a control circuit to calculate the distance to an object. Working principle The HC-SR04 module works by sending out a burst of high-frequency sound waves and then measuring the time it takes for the echo to return. 

1. Trigger pulse: To initiate a measurement, a microcontroller sends a 10-microsecond (µs) high-level pulse to the HC-SR04's "Trig" pin.
2. Sound transmission: The sensor automatically emits a burst of eight 40 kHz ultrasonic sound waves.
3. Echo reception: The "Echo" pin on the module goes high when the waves are transmitted and stays high until the sound waves bounce off an object and return to the receiver.
4. Distance calculation: A microcontroller measures the duration of the high pulse on the "Echo" pin. The distance is then calculated using the speed of sound:
   • Distance = (time ×cross× speed of sound) / 2
   • The formula divides by two because the time measured is for the round trip (outward and return) of the sound wave. 

Pinout 

 

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Ultrasonic sensors work by emitting sound waves at a frequency too high for humans to hear. They then wait for the sound to be reflected back, calculating distance based on the time required. This is similar to how radar measures the time it takes a radio wave to return after hitting an object.

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Established in the year 2018, Chaudhary Traders is known as a reputed Manufacturer, Wholesaler, Trader and Retailer of quality Relay Board, UNO Shield, Raspberry PI Board and much more.
The MQ-4 is a Metal Oxide Semiconductor (MOS) type gas sensor that is highly sensitive to methane (CH4) and compressed natural gas (CNG). These low-cost sensors are commonly used in DIY and industrial projects for gas leak detection and monitoring. 

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Established in the year 2018, Chaudhary Traders is known as a reputed Manufacturer, Wholesaler, Trader and Retailer of quality Relay Board, UNO Shield, Raspberry PI Board and much more.
The MQ-135 Air Quality Sensor Module is a semiconductor-based device used to detect and measure a wide range of harmful gases in the air. It is a popular, low-cost sensor for use in projects with microcontrollers like Arduino and ESP32. 

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We are counted among the well-reputed firm for providing Pir Sensor Module to our esteemed patrons. Customers can easily get them from us in varied specifications at nominal prices.

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A sound sensor module is an electronic component that detects sound waves and converts them into electrical signals. Typically used in robotics and automation, this module is an inexpensive and straightforward way to add "hearing" to a project, allowing it to react to noise.  Components of a sound sensor module  Most common sound sensor modules, such as the KY-038, contain the following parts:  

• Microphone: An electret condenser microphone detects sound waves and turns them into a variable analog electrical signal.
• LM393 voltage comparator: This integrated circuit (IC) processes the signal from the microphone. It compares the signal's voltage against a set threshold to produce a simple high or low digital output.
• Potentiometer: This adjustable resistor allows you to set the sensitivity of the sensor by changing the threshold value for the digital output.
• LED indicators:
  • Power LED: Illuminates when the module is powered on.
  • Signal LED: Lights up when the sound detected exceeds the threshold set by the potentiometer.
• Output pins:
  • VCC: Power supply pin, usually 3.3V to 5V DC.
  • GND: Ground pin.
  • A0 (Analog Out): Provides the raw analog signal from the microphone, allowing for the measurement of sound intensity.
  • D0 (Digital Out): Produces a high or low binary signal depending on whether the sound intensity has crossed the preset threshold. 

• •  

How it works  The working principle of a sound sensor is similar to the human ear, where a sound wave is converted into an electrical signal.  

1. Sound detection: An incoming sound wave, such as a clap or a whistle, causes the flexible diaphragm inside the electret microphone to vibrate.
2. Analog signal conversion: The microphone converts these vibrations into a small, variable electrical signal.
3. Amplification and comparison: The signal is then sent to the LM393 comparator. Here, its voltage is compared against the threshold voltage set by the potentiometer.
4. Digital output:
   • If the sound intensity is below the threshold, the digital output (D0) remains high.
   • If the sound intensity exceeds the threshold, the digital output (D0) switches to low, and the signal LED turns on.
5. Analog output: For more advanced projects, the raw analog output (A0) can be read by a microcontroller's analog-to-digital converter (ADC) to measure the actual sound level in real-time. 

1.  

Common applications Sound sensor modules are used in a wide array of projects, especially those involving Arduino and other microcontrollers. 

• Voice-activated switches: Turn a light or other device on or off with a clap or whistle.
• Robotics: Enable robots to react to auditory cues for navigation or interaction.
• Home automation and security: Build simple burglar alarms or monitoring systems.
• Sound-level monitoring: Detect noise pollution in an environment.
• Interactive art: Create a sound-reactive LED visualizer that responds to music. 

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An infrared (IR) sensor is an electronic device that measures and detects infrared radiation in its surrounding environment. Infrared radiation was accidentally discovered by an astronomer named William Herchel in 1800. While measuring the temperature of each color of light (separated by a prism), he noticed that the temperature just beyond the red light was highest. IR is invisible to the human eye, as its wavelength is longer than that of visible light (though it is still on the same electromagnetic spectrum). Anything that emits heat (everything that has a temperature above around five degrees Kelvin) gives off infrared radiation.

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The ACS712 provides economical and precise solutions for AC or DC current sensing in industrial, commercial, and communications systems. The device package allows for easy implementation by the customer. Typical applications include motor control, load detection and management, switched-mode power supplies, and overcurrent fault protection. The device consists of a precise, low offset, linear Hall sensor circuit with a copper conduction path located near the surface of the die. Applied current flowing through this copper conduction path generates a magnetic field which is sensed by the integrated Hall IC and converted into a proportional voltage. Device accuracy is optimized through the close proximity of the magnetic signal to the Hall transducer. A precise, proportional voltage is provided by the low-offset, chopper-stabilized BiCMOS Hall IC, which is programmed for accuracy after packaging.

With prosperous industry practice, our entity has gained huge appreciation in the market by presenting ACS712 Current Sensor to our respected patrons.

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Having a pre-determined quality administration system, we are thoroughly involved in delivering MQ 7 Carbon Monoxide Gas Sensor. 

The MQ-7 is a low-cost, semiconductor gas sensor commonly used in hobbyist and DIY electronics projects to detect carbon monoxide (CO) concentrations in the air. The sensor module uses a sensitive tin dioxide (SnO2cap S n cap O sub 2������2) material whose conductivity changes in the presence of CO.