Frequently Asked Questions

MARINE DIRECTIVE 2014/90/EU

What is the Marine Equipment Directive (MED / "Wheelmark") ?

The Marine Equipment Directive (MED) is aimed at ensuring that equipment which has to meet the requirements of international conventions (e.g., SOLAS, MARPOL, etc.) agreed at the International Maritime Organisation (IMO), additionally meets a common standard of safety and performance. Conformity assessment is through a Notified Body, such as BIS, BV, DNV, LR,  etc., and the compliance mark is the Ship’s Wheel. It also ensures that certificates issued by European Union member states, or on their behalf by notified bodies,...

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Shelf Life of Calibration Gas

What is the Shelf Life of my Calibration Gas ?

Calibration is a vital and necessary step to ensuring the proper performance of any gas detector. The calibration process requires use of a known concentration of test gas, also known as span gas or calibration gas. Use of incorrect or expired calibration gas can result in improper calibration. This can result in unsafe operation, as well as improper diagnosis of instrument malfunction. This article will focus on disposable (non-refillable) calibration gas cylinders for both reactive and non-reactive gases. Reactive Gas...

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Calibration Frequency

How often should I calibrate my gas detector ?

Calibration frequency is one of the most commonly asked questions regarding the use of gas detection instruments. Regulatory agencies typically refer users to follow manufacturers recommended protocols for calibration.

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