4-GAS QUAD MIX

Quad Gas Mixture

P/N 491 Calibration Gas Mixture· 50ppm CO / 25ppm H₂S / 0.7% Pentane (50% LEL) / 18% O₂, 34L (34L-491)
Trigas USA 34L aluminum disposable calibration gas cylinder — 491 mixture

491 Calibration Gas Mixture — 50ppm CO / 25ppm H₂S / 0.7% Pentane (50% LEL) / 18% O₂, 34L (34L-491)

$132.00
$132.00
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Trigas USA 34L aluminum disposable calibration gas cylinder — 491 mixture
  • Trigas USA 34L aluminum disposable calibration gas cylinder — 491 mixture
  • Trigas USA 34L aluminum disposable calibration gas cylinder — 491 mixture
  • Trigas USA 34L aluminum disposable calibration gas cylinder — 491 mixture
  • Trigas USA 34L aluminum disposable calibration gas cylinder — 491 mixture
491 Calibration Gas Mixture — 50ppm CO / 25ppm H₂S / 0.7% Pentane (50% LEL) / 18% O₂, 34L (34L-491)

491 Calibration Gas Mixture — 50ppm CO / 25ppm H₂S / 0.7% Pentane (50% LEL) / 18% O₂, 34L (34L-491)

$132.00
$132.00
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
34L
Certification
NIST-traceable calibration certificate included. Cylinder: 34L 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.

COA
Certificate of Analysis PDF · NIST-traceable
SDS
Safety Data Sheet PDF · OSHA / GHS
DOT
Shipping declaration PDF · 49 CFR
USE
Storage & handling PDF · best practices

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
Honeywell BW
GasAlert Quattro
BW Clip · MicroClip XL
Industrial Scientific
Ventis Pro4 · Ventis MX4
iNet · GasBadge Pro
RAE Systems
MultiRAE Lite · QRAE 3
MeshGuard · ToxiRAE Pro
Draeger
X-am 2500 · X-am 5000
X-am 8000 · Pac 7000
RKI Instruments
GX-2009 · GX-2012
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.

1–2 cyl
$132
3–9 cyl
$122.76
SAVE 7%
10–24 cyl
$113.52
SAVE 14%
25+ cyl
Request quote →
USA
Made in Florida, USA
NIST
NIST-traceable COA
DOT
DOT certified shipping
48H
Ships in 48 hours