Exhibition Label Text: Carbon monoxide detector, 1950s to the present.
This device replaced the canary for the important job of carbon monoxide
detection. Air was collected in the bulb and squeezed into a glass tube.
Carbon monoxide present in the air caused the crystals to change colour.
The staining on the crystals was measured against the graph to determine
the level of carbon monoxide in the air.
Black rubber bulb at top. Out of bulb base silver metal tube leading into an orange rubber section of tubing. Silver metal tube crossed at top by second metal section, at front inlet at back orange rubber tube with brass metal measuring strip.
l:23cm x w:10.8cm (at widest)