GASCO 421: 100 PPM Carbon Monoxide 50% LEL Methane 25 PPM Hydrogen Sulfide 18% Oxygen in Nitrogen 58 Liter Cylinder Flashlights The black background makes it

The black background makes it easier to see light colored oils/liquids

1262 - ASTM 97F 0-120F Range

Petro Marine's staff of trained technicians can test

Static Dissipative (SD)

customizable monochrome or optional color display which provides crystal clear visibility indoors or out

GASCO 421: 100 PPM Carbon Monoxide 50% LEL Methane 25 PPM Hydrogen Sulfide 18% Oxygen in Nitrogen 58 Liter Cylinder Flashlights The black background makes itProduct Description 100 PPM Carbon Monoxide 2. 5% CH4 (50% LEL) Methane 25 PPM Hydrogen Sulfide 18% Oxygen in Nitrogen Contained in an Aluminum Cylinder Cylinder connection C 10 5 8" 18 UNF Calibration Certificate NIST Made in the USA Select Cylinder Size