We present a novel instrument for imaging measurements of NO₂ with high spatiotemporal resolution based on gas correlation spectroscopy, called the GCS NO₂ camera. The instrument works by placing two gas cells (cuvettes) in front of two photosensor arrays, one filled with air and one filled with a high concentration of NO₂, acting as a non-dispersive spectral filter. NO₂ images are then generated on the basis of the signal ratio of the two channels in the spectral region of 430–445 nm.