Bump Test Gas Cylinders

Yes. Bump test gas cylinders carry an expiration date, typically 12 to 36 months from fill date depending on gas type and cylinder treatment. Reactive and toxic gases such as H2S, CO, and PH3 have shorter shelf lives. SpecGas's proprietary cylinder treatment process and Stability Guarantee extend usable life for reactive gas mixtures beyond standard industry norms.

A bump test is a quick functional check confirming that a gas detector's sensors and alarms respond when exposed to a target gas. Full calibration involves adjusting the detector's output to match a known reference concentration. If a bump test reveals a response outside acceptable limits, a full calibration must be performed using a certified calibration gas cylinder.

Most regulatory bodies, including OSHA, recommend bump testing gas detectors before each use, particularly in environments with toxic gases such as H2S, CO, or chlorine. Some industry standards and detector manufacturers specify daily or pre-shift bump testing. Always follow your instrument manufacturer's guidelines and applicable workplace safety regulations for your specific application.

The most common bump test gases include Carbon Monoxide (CO), Hydrogen Sulfide (H2S), Oxygen (O2), combustible gases such as methane and propane for LEL testing, ammonia (NH3), chlorine (Cl2), and phosphine (PH3). Multi-gas detectors often require a combination cylinder containing two or more target gases blended at specified concentrations.

Bump test cylinders are primarily used for functional alarm verification, not precision calibration. For full instrument calibration, a certified calibration gas cylinder with a certified concentration and NIST-traceable certificate of analysis is required. SpecGas provides NIST-traceable calibration gas mixtures suitable for both bump testing and full calibration of analytical instruments and gas detectors.

Disposable cylinders are generally preferred for field and remote applications due to their portability, ease of transport, and suitability for overseas shipping. SpecGas offers bump test gases in disposable aluminum and steel cylinders ranging from 17 to 103 liters gas capacity, making them practical for confined-space entry, oil and gas sites, and other field operations.