nymea/libnymea/interfaces/gassensor.json

{
    "extends": "sensor",
    "description": "Flammable gas (LPG, Propane, Methane etc) sensors. Measures co2 in parts per million.",
    "states": [
        {
            "name": "gas",
            "type": "double",
            "unit": "PartsPerMillion",
            "logged": true
        }
    ]
}