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Purple square gas sensor breakout seen at an angle, with the round black gas cell underneath, two Qwiic connectors and an ADDRESS DIP switchProductSoldered Electrochemical H2S Gas Sensor Breakout (Qwiic)Hydrogen sulphide sensor board with an SGX-4H2S-300 electrochemical cell for 0 to 300 ppm, read over Qwiic.SKU 333331DatasheetSGX-4H2S-300 DatasheetSGX Sensortech's datasheet for the gas cell: output signal, range, response time, operating conditions and cross sensitivity.ArduinoElectrochemical Gas Sensor SolderedArduino library with the seven examples used in these pages.commit c4df54bMicroPythonSoldered-ElectrochemicalGasSensor-MicroPython-LibraryMicroPython library with the six examples used in these pages.commit 623e1e6