A new and improved kit for monitoring compressed breathing air to CGA Grade D standards is available from Sensidyne/Kitagawa of Clearwater, Fla. The kit utilizes a regulator/ flowmeter assembly and tube holder. Five unique direct reading detector tubes are available for carbon monoxide, carbon dioxide, water vapor, oil mist and oxygen. All five tests can be run in about 35 minutes. An upgrade kit is available to convert older Sensidyne kits to the new tubes and improved sampling format.