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Purple Soldered gas sensor breakout seen at an angle, with the round gas cell underneath, two Qwiic connectors, the ADDRESS switch and labelled header padsProductSoldered Electrochemical NH3 Gas Sensor Breakout (Qwiic)Ammonia sensor board with an SGX-4NH3 cell for 0 to 300 ppm, read over Qwiic.SKU 333330DatasheetAmmonia gas cell datasheetSGX Sensortech's datasheet for the ammonia cell: output signal, measurement range, response time, operating conditions and cross-sensitivity.ArduinoElectrochemical Gas Sensor SolderedArduino library: sensor presets, ppm and ppb readings, averaging and zero calibration.Commit c4df54bMicroPythonSoldered ElectrochemicalGasSensor MicroPython LibraryMicroPython module with the same presets and readings, installed with mpremote.Commit 623e1e6