The MiniPID 2 includes a filter which allows for free diffusion of ambient air into and out of the sensor whilst preventing ingress of contaminants and particulates. The MiniPID 2 can also sample from a gas stream passed over the filter exterior. Flow rates of 50 to 500 mL/min are generally acceptable, and the gas differential at the sensor interface vs ambient should not exceed -10 mbar.

The MiniPID 2 includes a filter which allows for free diffusion of ambient air into and out of the sensor whilst preventing ingress of contaminants and particulates. The MiniPID 2 can also sample from a gas stream passed over the filter exterior. Flow rates of 50 to 500 mL/min are generally acceptable, and the gas differential at the sensor interface vs ambient should not exceed -10 mbar.