Accurately measures concentration levels of ethylene, carbon dioxide, and other gases in ripening and cooler rooms and warehouses.Easy to use: break off each end of the sampling tube
(sold separately), insert into pump and pull the handle. A clear indication of the concentration of the gas being measured is shown by the length of the stain in the glass tube. The measurement is precisely recorded for direct reading on a single calibration scale printed on each tube.
Features:
Dependable, trouble-free operation
- Slender lightweight design with sure-grip shape
- Corrosion-resistant and spark-resistant if dropped
- Piston-type volumetric pump assures accuracy every time
- Fail-safe handle locks in two positions
- Flow finish indicator on back of handle
- Lifetime warranty
- Kit includes pump, carrying pouch and spare parts
Hundreds of tubes for various gases are available, click here to see them all. 
