Good afternoon. I have an urgent job for you. It is important for all who still live or, more precisely, exist in our woeful region. You know where the chemical factory is? Doesn’t matter now what was produced there and what is happening there now. I mean, who controls it or who tries to secure it. I have a firm suspicion that some sort of poison is leaking from the factory premises into the groundwater. And because of the lack of supplies from the outside, we are all forced to drink this water. Do you understand? Even the filters are no longer effective. If we do not resolve this issue, nobody will need ammo and grenades anymore. To figure it out I need the readings of radio and gas analyzers, which should be in the factory shops next to the water pumps. Look for a small separate room right in the shops and there they should be.
Unlocks the door to the pumping room, which contains loose loot scattered around the floor and table. The Gas analyzer can spawn here.
While Gas analyzers do spawn on Factory as suggested by Therapist, they are much more common to find on the map Interchange. By searching the shelving of all the electronics stores, multiple gas analyzers can easily be found in a single raid.