CALIBRATION GAS
Calibration Gas
491 Calibration Gas Mixture — 50ppm CO / 25ppm H₂S / 0.7% Pentane (50% LEL) / 18% O₂, 58L (58L-491)
$159.00
Sale price
$159.00
Regular price
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491 Calibration Gas Mixture — 50ppm CO / 25ppm H₂S / 0.7% Pentane (50% LEL) / 18% O₂, 58L (58L-491)
$159.00
Sale price
$159.00
Regular price
COA included
Certificate of analysis
NIST traceable
Lab-certified tolerance
24 mo shelf life
From fill date
Ships in 48 hrs
From Florida, USA
Carbon Monoxide
491 Calibration Gas Mixture — 50 ppm
Hydrogen Sulfide
25 ppm
Pentane
0.7% (50% LEL)
Oxygen
18%
Cylinder volume
58L
Certification
NIST-traceable calibration certificate included.
Cylinder: 58L aluminum, C-10 connection. UN1956.
Made in the USA.
DOT classification
UN1956 · 2.2 Non-flammable gas
Every cylinder ships with a NIST-traceable Certificate of Analysis. Request product-specific files in 1 business day.
Calibration gas mixture matched to the most common 4-gas confined-space detectors. Use with a standard demand-flow regulator.
MSA
Altair 4X · Altair 4XR
Altair 5X · Altair Pro
Altair 5X · Altair Pro
Honeywell BW
GasAlert Quattro
BW Clip · MicroClip XL
BW Clip · MicroClip XL
Industrial Scientific
Ventis Pro4 · Ventis MX4
iNet · GasBadge Pro
iNet · GasBadge Pro
RAE Systems
MultiRAE Lite · QRAE 3
MeshGuard · ToxiRAE Pro
MeshGuard · ToxiRAE Pro
Draeger
X-am 2500 · X-am 5000
X-am 8000 · Pac 7000
X-am 8000 · Pac 7000
RKI Instruments
GX-2009 · GX-2012
GX-3R Pro · Eagle 2
GX-3R Pro · Eagle 2
Compatibility based on manufacturer specs. If your detector is not listed, contact us — we likely have a matching mix.
Volume pricing
Buying for a fleet?
Tier discounts apply automatically at checkout.
USA
Made in Florida, USA
NIST
NIST-traceable COA
DOT
DOT certified shipping
48H
Ships in 48 hours