Particulate matter measurement apparatus and method
AssigneesAlphaSense Oy, Cambridge Enterprise Limited
InventorsSimone Hochgreb, Robert Nishida, Adam Boies, John Saffell
Life of this patent
Estimating the term…
Abstract
Particle measurement apparatus comprises an inlet for receiving a gas sample for analysis, a photoionisation chamber, at least one light source arranged to illuminate an interior of the photoionisation chamber, first and second electrodes coupled to a power source and configured to provide a DC potential difference across at least a portion of the photoionisation chamber, and an outlet, together defining a gas flow path from the inlet, through the photoionisation chamber, and towards the outlet.
Claims27
Particulate matter measurement apparatus comprising an inlet for receiving a gas sample for analysis, a photoionisation chamber, at least one light source arranged to illuminate an interior of the photoionisation chamber to photoionize particulate matter in the gas sample, first and second electrodes coupled to a power source and configured to provide a DC potential difference across at least a portion of the photoionisation chamber, and an outlet, together defining a gas flow path from the inlet, through the photoionisation chamber, and towards the outlet.
A method of using a particulate matter measurement apparatus, the method comprising:
- receiving a gas sample for analysis using an inlet,
- providing a photoionisation chamber,
- illuminating an interior of the photoionisation chamber using at least one light source to photoionize particulate matter in the gas sample;
- coupling first and second electrodes to a power source to provide a DC potential difference across at least a portion of the photoionisation chamber, and
- providing an outlet, together defining a gas flow path from the inlet, through the photoionisation chamber, and towards the outlet.
Particulate matter measurement apparatus comprising an inlet for receiving a gas sample for analysis, a photoionisation chamber, first and second electrodes, at least one light source arranged to illuminate an interior of the photoionisation chamber between the first and second electrodes to photoionize particulate matter in the gas sample, at least one electrode current sensor configured to measure an electrode current flowing to or from at least one of the first and second electrodes, and an outlet, together defining a gas flow path from the inlet, through the photoionisation chamber between the first and second electrodes, and towards the outlet.
Dependencies are inferred from the claim text.