| abstract |
An improved apparatus for sensing exhaust emissions ( 15 ) comprising a passive induction sampler ( 50 ) configured to sample exhaust from a source ( 16 ), a processing unit ( 30 ) connected to the induction sampler and configured to be mounted in close proximity to exhaust from the source, the processing unit comprising an input port ( 31 ) adapted to receive flow from the passive induction sampler, an output port ( 32 ), a flow path ( 33 ) between the input port and the output port, a sensor ( 34 ) for sensing one or more pollutants in the flow path, a processor ( 37 ) configured to receive measurements from the sensor, a power source ( 39 ), and a wireless transmitter ( 36 ) connected to the processor. |