Field checking adapter for GM70 and GMP220 Series CO2 probes

The field checking adapter is a compact plastic chamber that attaches gas tight around the sensor head of the carbon dioxide probe. It can be used to feed in reference gas when field checking the probe or as a chamber for a pump aspirated sampling system. Instructions for use included. Compatible with GMP221 and GMP222 probes, which are used in GMT220 Series, GMM220 Series and GM70 series instruments.