NOTE: Be sure to check your BRAND and MODEL for specifics. I have used MSA devices in this article because they are the brand I have used for 30+ years, and I am a huge fan of their products. ALL brands will have similar restrictions. ATTENTION TO these details matters!
Yes, MSA enforces strict maximum tubing lengths for direct-reading instruments. The allowable length depends on the specific instrument category, the tubing’s internal diameter, and the sampling pump capacity.
Portable Multigas Detectors (ALTAIR Series):