Gravity: Electrochemical Carbon Monoxide (CO) Sensor (SEN0466)

The DFRobot Gravity: SEN0466 Carbon Monoxide Sensor is an industrial-grade, high-precision safety module designed to protect environments from “the silent killer.” Built around a premium electrochemical cell, this sensor detects carbon monoxide concentrations with exceptional accuracy, offering a rapid response time and minimal cross-sensitivity to other ambient gases.

Engineered for seamless integration, it combines a factory-calibrated output with DFRobot’s plug-and-play Gravity interface, making it an essential component for residential safety monitors, smart building automation, and industrial health and safety systems.

Key Features

⚡ Industrial-Grade Reliability & Accuracy

Unlike cheap catalytic bead or metal-oxide sensors that drift significantly over time, the SEN0466 uses an electrochemical sensing element. It delivers precise, linear readings of CO concentration directly proportional to the gas volume, ensuring critical safety thresholds are never missed.

🎯 Pre-Calibrated Digital & Analog Outputs

Skip the complex calibration chambers and hazardous test gases. Every DFRobot SEN0466 module arrives factory-calibrated, hardcoding the exact sensitivity curves directly onto the onboard signal-conditioning microcontroller. It supports three concurrent output modes for ultimate flexibility: I2C, UART, and Analog voltage.

🛡️ Built-In Signal Conditioning & Protection

The breakout board features robust onboard voltage regulation and signal filtering to isolate the sensitive electrochemical cell from electromagnetic interference (EMI) and power rail ripples. This guarantees a clean, stable signal even when deployed alongside heavy-duty relays, fans, or wireless transmitters.

🔌 Ecosystem Ready (3.3V / 5V Compatible)

Featuring a wide input voltage range of 3.3V to 5.5V, this module is fully compatible with modern 3.3V microcontrollers (like ESP32, Raspberry Pi Pico, or ARM Cortex boards) as well as traditional 5V hardware like Arduino Uno.

Technical Specifications

Pinout and Interface Guide

The sensor features a standard Gravity 4-pin connector, allowing you to choose your preferred communication protocol via an onboard hardware switch or software command:

• VCC: Power input (3.3V – 5.5V)

• GND: Ground connection

• SCL / TX / A: I2C Clock / UART Transmit / Analog Output

• SDA / RX / NC: I2C Data / UART Receive / No Connection

Applications

• Smart Home Automation: Integrate directly into Home Assistant or local smart hubs to trigger immediate whole-house ventilation, open garage doors, and kill HVAC heating elements if a furnace or vehicle malfunctions.

• Industrial & Garage Air Quality Monitoring: Track toxic exhaust build-up in commercial parking structures, warehouses using propane forklifts, or workshops.

• Portable Environmental Safety Dataloggers: Build rugged, battery-operated wearable badges or handheld air quality sniffers for field technicians and first responders.

What’s In The Box:

• 1 Gravity: Electrochemical CO Sensor Module (SEN0466)

• 1 Gravity 4-Pin Cable (Analog/Digital selectable)