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Flammable Gas Leakage Detector

An AC powered standalone system with smart connectivity using Bluetooth® Low Energy (LE) 5.1 communication to detect the leakage of flammable gas can be a very useful system for industrial and household applications. In this system, a single microcontroller (MCU) with built-in Bluetooth LE communication, DC/DC block and 10-bit ADC aids in quick and easy implementation of a safe system. Additionally, a 1200V built-in bipolar junction transistor (BJT) based AC/DC system can be used for any industrial power line system.

System Benefits

  • Very high AC operating range with the iW1821 switched-mode power supply (SMPS) IC
  • Single MCU + Bluetooth LE 5.1 chip is used for detection and connectivity
  • Stand alone, wall mounted system, very small in size and low component count
  • Built-in 900V BJT, isolated flyback AC/DC
  • LED indication is given for Bluetooth LE connectivity indication
  • Buzzer indication for safety/security risk from gas leak

Target Applications

  • Liquefied petroleum gas (LPG) leak detection
  • Industrial gas leak detection
Flammable Gas Leakage DetectorRenesas Dialog Diagram Legend
Bluetooth Low Energy (BLE) Module      
DA14531MOD SmartBond TINY™ Module, world’s smallest and lowest power Bluetooth 5.1 SoC Datasheet Buy/Sample


Gas Sensor      
SGAS711 Flammable Gas Sensor - Methane, Propane, Hydrogen, LPG Datasheet Buy/Sample


Linear Regulator (LDO)      
RAA214401 150mA Wide Input Range Ultra-Low Quiescent Current Linear Regulator Datasheet Buy/Sample


PWM Controller      
iW1822 900V AccuSwitch™ AC/DC Digital Primary-Side Converter for Industrial Applications up to 18W Product Summary Buy/Sample