4-Gas Calibration Gas - 50% LEL Methane / 18% O2 / 25 ppm H2S / 100 ppm CO, 34-116 L

Specifications

Brands quoted

Calgaz · MSA · Industrial Scientific

composition

CH4 2.5% (50% LEL) / O2 18% / H2S 25 ppm / CO 100 ppm / N2 balance

accuracy

+/-2% to 5% analytical (confirm per maker)

cylinder

Disposable steel/aluminum, non-reactive

sizes

34 L, 58 L, 103 L, 116 L

shelf_life

About 12-24 months (H2S-limited)

Standard

ISEA bump-test position statement

Documentation

Rating per manufacturer; test report being verified

SKU

PB-FALL-068

About

Certified quad-mix calibration gas for portable 4-gas monitors (MSA ALTAIR, Honeywell BW, Industrial Scientific, RKI). Use it for the daily bump tests and full calibrations that confined-space and trench work requires. • Quad mix: 2.5% CH4 (50% LEL), 18% O2, 25 ppm H2S, 100 ppm CO, balance N2 • NIST-traceable certificate of analysis on every lot • Non-reactive cylinder for stable H2S • 34, 58, 103 and 116 L sizes; C-10 or 5/8-18 thread (match your regulator) • Follows the ISEA statement on bump testing before each day's use • Ships hazmat limited-quantity; ask about cylinder recycling Brands we quote: Calgaz · MSA · Industrial Scientific. Brand names are trademarks of their owners. Mays is an independent supplier, not an authorized agent of any brand; current manufacturer models are confirmed on your written quote.