The MSA 10048280 is a 34-liter, four-gas calibration cylinder containing 1.45% methane (CH4) for the combustible/LEL channel, 15% oxygen (O2), 60 ppm carbon monoxide (CO), and 20 ppm hydrogen sulfide (H2S). It is a non-refillable aluminum cylinder that delivers 34 liters of gas. The mixture is prepared gravimetrically with NIST-traceable weights, and each cylinder ships with an individual Certificate of Analysis and an SDS.

The MSA 10048280 cylinder is used to bump test and calibrate MSA portable multi-gas detectors that monitor the four common confined-space gases: combustible (LEL/methane), oxygen, carbon monoxide, and hydrogen sulfide. Its 1.45% CH4 / 15% O2 / 60 ppm CO / 20 ppm H2S mixture matches MSA's standard four-gas cal-gas specification, verifying that each sensor responds correctly and that alarms trigger at the right levels. Confirm your specific detector's required cal gas mixture in its manual before ordering.

It means the gas concentrations are accurate and documented to a recognized national standard. The MSA 10048280 mixture is prepared gravimetrically (by precise weight) using NIST-traceable weights, and every cylinder is supplied with an individual Certificate of Analysis stating the actual measured concentrations plus the lot number, along with a Safety Data Sheet. This traceability is what lets a calibration record stand up to safety audits and compliance documentation.

MSA's official product page for part number 10048280 lists ISO 9001, ISO 17025, and ISO 17034 as its approvals/standards. ISO 9001 covers quality management systems, ISO 17025 covers the competence of testing and calibration laboratories, and ISO 17034 covers the competence of reference material producers — together supporting the accuracy and documentation behind the cylinder's Certificate of Analysis.

The MSA 10048280 uses 15% O2 on purpose. Normal air is about 20.9% oxygen, so a reduced 15% level lets the calibration confirm that the detector's oxygen sensor reads accurately in an oxygen-deficient atmosphere and that its low-O2 alarm activates — the exact hazard an O2 sensor exists to catch. Testing only at 20.9% would not prove the sensor can detect a dangerous drop.

Yes. The same MSA 10048280 four-gas mixture works for both a bump test (a quick check that each sensor responds and alarms) and a full span calibration (adjusting the detector's readings to the known gas values). A bump test uses very little gas and is recommended before each day's use; a full calibration uses more and is done on a set interval. Both require applying the gas through a compatible flow regulator.

The MSA 10048280 cylinder requires a compatible flow regulator to deliver gas to the detector — either a fixed-flow regulator matched to your detector's sampling rate or a demand-flow regulator for pumped instruments. A regulator (and calibration cap/tubing) is an accessory and is not the gas cylinder itself, so make sure you have the correct one for your MSA detector.

The MSA 10048280 is a 34-liter aluminum calibration cylinder measuring 11.299 in (287 mm) tall by 2.953 in (75 mm) wide/deep, and weighing 1.653 lb (0.750 kg), per MSA's official specifications. Its compact size makes it easy to store in a gas-detection service kit while still holding enough gas for multiple bump tests and calibrations.

The MSA 10048280 ships with free shipping from Industrial Safety Products. However, like other compressed-gas cylinders it is not eligible for returns or exchanges, so confirm you are ordering the correct four-gas mixture (1.45% CH4, 15% O2, 60 ppm CO, 20 ppm H2S) for your detector before purchasing. Empty cylinders can go back through MSA's calibration-gas recycling program.

Choose based on how much gas you go through: the MSA 10048280 holds 34 liters, while MSA's larger four-gas cylinder holds 58 liters. Both use the same 1.45% CH4 / 15% O2 / 60 ppm CO / 20 ppm H2S mixture and the same NIST-traceable, gravimetric preparation with an individual Certificate of Analysis. The 34L option is more compact and lighter (1.653 lb) for occasional bump testing or a smaller fleet of detectors, while the 58L size suits higher-frequency calibration programs where fewer cylinder changeouts are preferred.

For MSA detectors, yes. The MSA 10048280 is formulated to MSA's own four-gas specification, prepared gravimetrically with NIST-traceable weights, and backed by an individual Certificate of Analysis, with the cylinder itself produced under ISO 9001, ISO 17025, and ISO 17034 standards — so you get documented, audit-ready accuracy and a mixture MSA validates for its instruments. Using the manufacturer-matched cal gas removes guesswork about whether an off-spec mixture could bias your sensor calibration, which matters when the detector is protecting a worker's life.