SKU: SENS-3067
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DFRobot Gravity Alcohol Sensor (0–5ppm) - I2C/UART Output

₹3,189.00 (Inclusive of all taxes)
Out of Stock

The DFRobot Gravity Alcohol Sensor is a low-power electrochemical gas sensor module designed for detecting alcohol vapor concentrations from 0 to 5 ppm. It features factory calibration, I2C and UART (0-3V) signal outputs, and is compatible with 3.3V/5V microcontrollers like Arduino, Raspberry Pi, and ESP32 for breathalyzer and air quality monitoring applications.

Features

  • Electrochemical alcohol sensor with 0-5 ppm detection range
  • Factory calibrated for accurate, stable readings
  • Dual I2C and UART (0-3V) digital signal outputs
  • Low power consumption (0.05W @ 5V) and wide 3.3-5.5V DC input
  • Gravity interface for plug-and-play connectivity with DFRobot shields

Out of stock

Description

This sensor employs an electrochemical sensing principle to detect alcohol (ethanol) vapor with high selectivity and sensitivity. Factory calibration ensures reliable, accurate concentration data in ppm, minimizing the need for user-side adjustment. The onboard signal conditioning provides stable, linearized outputs via I2C or UART interfaces.

Designed for integration into portable and fixed monitoring systems, it operates across a -20 to +50°C temperature range with anti-interference characteristics against common gases like benzene, toluene, and carbon monoxide. The module’s Gravity connector standard simplifies wiring for rapid prototyping and deployment in applications requiring precise alcohol concentration measurement.

Key Features

  • Electrochemical alcohol sensing cell with ≤0.01 ppm resolution
  • Factory calibrated for out-of-the-box accuracy and long-term stability
  • Dual digital output options: I2C and UART (0-3V logic level)
  • Low power operation (0.05W) compatible with 3.3V to 5.5V systems
  • Integrated reverse-connection protection circuit
  • Fast response time (≤60 seconds) with a ≤3 minute preheat period
  • Robust construction for a service life of up to 2 years
  • Gravity 3-pin interface for easy connection without soldering

Applications

  • Portable personal breathalyzer and alcohol screening devices
  • In-vehicle alcohol detection systems for smart car safety interlocks
  • Indoor air quality monitoring for alcohol vapor in laboratories or industrial settings
  • Educational projects for gas sensing and environmental monitoring with Arduino or Raspberry Pi
  • Safety compliance monitoring in workplaces where alcohol-based solvents are used

Technical Specifications

Detected GasAlcohol (Ethanol)
Detection Range0 – 5 ppm
Operating Voltage3.3 – 5.5 V DC
Power Consumption0.05 W (at 5V)
Output InterfaceI2C, UART (0-3V)
Resolution≤ 0.01 ppm
Response Time≤ 60 s
Preheat Time≤ 3 min
Operating Temperature-20 to +50 °C
Operating Humidity15 – 90% RH (non-condensing)
Storage Temperature0 – 25 °C
Interfering GasesBenzene, Toluene, Acetic Acid, H2S, CO
Dimensions (L x W)37 x 27 mm

Frequently Asked Questions

What is the operating voltage range for this alcohol sensor?

The module operates from 3.3 to 5.5 volts DC, making it directly compatible with common 3.3V and 5V microcontroller platforms like Arduino, ESP32, and Raspberry Pi without requiring a level shifter.

How do I communicate with this sensor? What are the pinouts?

The sensor provides both I2C and UART (serial) digital communication interfaces. The standard Gravity 3-pin connector carries VCC, GND, and the signal line, which can be configured for either protocol. For I2C, use the SDA/SCL pins; for UART, it outputs a 0-3V logic level serial data stream.

Is this sensor calibrated, and what gases does it detect?

Yes, the sensor is factory calibrated for alcohol (ethanol) detection in the 0-5 ppm range. It is specifically sensitive to ethanol vapor and is designed to resist interference from other common gases like benzene, toluene, acetic acid, hydrogen sulfide, and carbon monoxide, though high concentrations of these may affect readings.

What is the response time and preheat requirement?

The sensor has a response time of ≤60 seconds to reach a stable reading after a gas concentration change. It requires a preheat time of ≤3 minutes after power-on before it can provide accurate measurements, allowing the internal electrochemical cell to stabilize.

Package Includes

  • 1 x DFRobot Gravity Alcohol Sensor Module

Additional Information

Dimensions 3.7 × 2.7 cm