Gas Detector Calibration & Accessories

Gas detector calibration gas, regulators & bump-test accessories

Short answer: keep every monitor accurate with the right calibration gas and a compatible flow regulator. Bump-test before each use; calibrate on schedule.

A gas detector is only as trustworthy as its last bump test. This collection gathers the consumables and accessories that keep your monitors compliant — calibration gas to verify the sensors, and regulators to deliver it at the correct flow.

This is a gas-type collection under the Gas Detectors hub. Match the gas to the right form factor: Portable Gas Detectors for carried checks, Personal & Wearable Gas Detectors for single-worker exposure, Fixed Gas Detection Systems for continuous plant monitoring, Area & Transportable Gas Monitors for job-site zones, and Gas Leak Detectors to pinpoint a leak source.

What this collection covers

• Norlab 4-Gas Calibration Gas Mix — 25 ppm H2S, 100 ppm CO, 50% LEL methane, 18% O2 for bump-testing 4-gas monitors.
• Fixed-Flow Calibration Gas Regulator — 0.25 LPM, C10 fitting, for diffusion monitors (MSA Altair, RKI GX-3R and more).

Editor’s pick — a complete bump-test kit
Pair the Norlab 4-gas calibration gas with the fixed-flow regulator to bump-test and calibrate any standard 4-gas monitor. As an Amazon Associate, WC Safety earns from qualifying purchases.

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How to build a calibration program

Bump-test every monitor before each day of use, log the result, and run a full calibration on the manufacturer’s schedule. Match the calibration gas to the monitor’s sensors (a 4-gas mix for O2/LEL/CO/H2S; the matching single-gas cylinder otherwise) and the regulator to the monitor type (fixed-flow for diffusion, demand-flow for pumped). Watch the gas cylinder’s expiry date.

Frequently asked questions

Why do I need calibration gas and a regulator?

Every gas detector must be bump-tested (and periodically calibrated) to confirm its sensors and alarms respond. That requires a cylinder of calibration gas and a regulator to control the flow.

What is a bump test?

A bump test briefly exposes the monitor to a known gas to verify the sensors and alarms respond. It should be done before each day of use.

What calibration gas do I need?

For a 4-gas (O2/LEL/CO/H2S) monitor, a 4-gas mix like the Norlab 4-Gas Calibration Gas; single-gas monitors use the matching single-gas cylinder.

Fixed-flow or demand-flow regulator?

Diffusion monitors use a fixed-flow regulator such as the 0.25 LPM fixed-flow regulator; pumped (sample-draw) monitors use a demand-flow regulator.

How often should I calibrate?

Bump-test before each day of use and perform a full calibration on the manufacturer's schedule or after any failed bump test.

Does calibration gas expire?

Yes — calibration gas has a shelf life printed on the cylinder; use it before the expiry date for accurate results.

Which monitors does this work with?

Standard monitors across the Portable and Personal hubs — confirm the regulator fitting matches your cylinder and detector.

Why bump-test at all?

Bump testing confirms the instrument a worker relies on actually responds to gas — a quick daily check that can prevent a missed alarm.