Matheson-Kitagawa precision detector tubes are formulated with high purity chemical reagents which absorb and react with the gas or vapor being measured. The reaction causes a colorimetric stain which varies in length to the concentration of the gas or vapor being measured. The length of stain is normally read directly off a scale printed on each tube. Four types of Matheson-Kitagawa tubes provide the needed flexibility for different gases and sampling conditions.

Kitagawa Data Sheet 121U (phosphine)
Kitagawa Data Sheet 121SB

Don't order more than you will use in the near future. Gas detection tubes have a finite shelf life. MATHESON guarantees the detector tubes you receive will have at least three months of remaining shelf life.

The 8014B-ORF orifice is needed for the 400B gas aspirating pump when using the 121SB tube.

Safety Data Sheets (SDS)

SDS, 121U Tube

SDS, 121SB Tube