{
    "Nitrate-API": {
        "units": "ppm",
        "led": 520,
        "fit_type": "polynomial",
        "fit_coef": [
            0.38483325620693715,
            33.97848178672297,
            0.0
        ],
        "range": {
            "min": 0.0,
            "max": 1.44
        }
    }
}