SKU: SENS-3048
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DFRobot Gravity H2S Gas Sensor Calibrated - I2C/UART/Analog Output

₹8,819.00 (Inclusive of all taxes)
Out of Stock

The DFRobot Gravity H2S Gas Sensor is a factory-calibrated electrochemical module for detecting hydrogen sulfide concentrations from 0 to 100 ppm. It offers flexible analog, I2C, and UART output modes for seamless integration with Arduino, ESP32, Raspberry Pi, and other 3.3V/5V logic platforms.

Features

  • Electrochemical H2S sensor with 0-100 ppm detection range.
  • Triple output modes: Analog voltage, I2C digital, and UART serial.
  • Factory calibrated with integrated temperature compensation.
  • 32 configurable I2C addresses for multi-sensor setups.
  • Gravity interface for plug-and-play connectivity with DFRobot ecosystem.

Out of stock

Description

This sensor employs an electrochemical sensing cell to detect hydrogen sulfide (H2S) gas, providing high sensitivity and selectivity with minimal cross-sensitivity to other common gases. The onboard signal conditioning circuit outputs a stable, linear signal corresponding to gas concentration. The module features an integrated temperature compensation algorithm to maintain accuracy across its operating range of -20°C to +50°C.

Designed for durability, the sensor probe offers strong anti-interference capability and a typical lifespan exceeding two years in air. The companion Gravity interface adapter board simplifies wiring, providing a standardized 4-pin connector for quick prototyping and system integration in industrial monitoring, environmental safety, and research applications.

Key Features

  • Electrochemical sensing principle for precise H2S detection.
  • Factory calibrated for immediate, accurate measurements.
  • Supports analog (0-3V), I2C, and UART serial communication.
  • 32 software-configurable I2C addresses prevent bus conflicts.
  • Integrated temperature compensation ensures stable readings.
  • Configurable threshold alarm function via digital interfaces.
  • High-value build with a durable probe and compact adapter board.
  • Wide operating voltage range (3.3V to 5.5V DC) for system flexibility.

Applications

  • Industrial safety monitoring for H2S leaks in oil & gas facilities.
  • Environmental air quality assessment and pollution control systems.
  • Confined space and underground utility hazard detection.
  • Laboratory research and educational gas sensing experiments.
  • Integration into portable air quality monitors and data loggers.

Technical Specifications

Detection GasHydrogen sulfide (H2S)
Detection Range0 to 100 ppm
Output SignalsAnalog Voltage (0-3V), I2C, UART
Operating Voltage3.3 to 5.5 V DC
Operating Current< 5 mA
Operating Temperature-20°C to +50°C
Operating Humidity15% to 90% RH (non-condensing)
Sensor Life> 2 years (in air)
Adapter Board Size37 mm x 32 mm
CompatibilityArduino, ESP32, Raspberry Pi

Frequently Asked Questions

What is the output voltage range of the analog signal?

The analog output provides a linear voltage signal from 0V to 3V, corresponding directly to the hydrogen sulfide concentration across the 0 to 100 ppm range. This output is ratiometric to the supply voltage, ensuring stable readings when powered from 3.3V or 5V sources.

How do I change the I2C address on this sensor?

The module supports 32 software-configurable I2C addresses. You can change the address via specific commands sent over the I2C or UART interface using the provided DFRobot library. This allows multiple sensors to operate on the same I2C bus without address conflicts.

Is this sensor suitable for outdoor or harsh industrial environments?

The sensor probe is designed for durability with an operating temperature range of -20°C to 50°C and humidity tolerance of 15-90% RH (non-condensing). For permanent outdoor or harsh industrial installation, consider protective enclosures to shield the electronics from direct water ingress and extreme conditions beyond its specified ratings.

Does the sensor require any periodic calibration?

The sensor is factory calibrated, providing accurate measurements out of the box. However, like all electrochemical sensors, its sensitivity may drift over its typical two-year lifespan. For critical applications, periodic recalibration using known H2S concentration standards is recommended to maintain long-term accuracy.

Package Includes

  • 1 x Gravity H2S Signal Conversion Board
  • 1 x H2S Electrochemical Sensor Probe
  • 1 x Gravity 4-pin Cable

Additional Information

Weight 0.1 kg
Dimensions 7 × 9 × 3 cm