Hello. Recently i use the gas sensor(Alphasense`s sensor OX_B431 NO2_B43F SO2_B4 CO_B4),and use these sensors with lmp91000, But i cann`t read any changes On Vout if i insert into or pull out the gas sensor? the SPI communication with LMP91000 is OK. my circuit is below , So Can someone give me sone ideas, What should i do??
my Configureation parameter for lmp91000 is Vref=2.5 Zero = 67%, No Bias,
