For measuring pollutants in the atmosphere and flue gases etc. Incorporating a lightweight and portable aspirator pump sampler on which can be mounted a wide range of colour change detector tubes. This simple to use system requires no specialist knowledge and there are no chemical reagents to prepare. The detector chemicals are sealed in tubes and ready for immediate use. A reading can be obtained in a few minutes and therefore many locations can be sampled in a short time. Supplied with carrying case and 2 spare rubber inlets, but without detector tubes.