INquiry about high-accuracy sensors

I am currently working on a project involving the monitoring of gases emitted from ships in port areas, and I am interested in acquiring high-accuracy sensors for measuring CO2, SO2, and NO2 levels. Specifically, I am looking for sensors that meet the following requirements:  High accuracy and precision Suitable for outdoor and potentially harsh environmental conditions Capable of being installed on buoys for marine applications Durable and reliable in marine environments Easy integration with data logging systems Measurement range: suitable for detecting emissions from ships Could you please provide recommendations for the best sensors you have that meet these criteria, along with their technical specifications and pricing information?