Rotameter RAMC gains explosive-area certification

The Yokogawa Rotameter RAMC flowmeter has been certified for use in areas with a risk of gas and dust explosions.

The instrument now comes with a number of Ex certificates that are valid in Europe, the US, Australia, China and various other countries.

The explosion protection for dust zones is available for instruments with the 'd'-type flameproof protection in a robust aluminium housing with the marking II 1D Ex tD A20 IP67 T1 through to T6 or II 2D Ex tD A21 IP67 T1 through to T6.

For type 'i' intrinsic safety protection with the marking II 2G Ex ia IIC T6 or II 2G Ex ia IIB/IIC T4, the Rotameter RAMC is equipped with a stainless-steel housing.

The Rotameter range is used in many areas of industry and includes designs with glass, plastic and metal measuring tubes.

Units are available with mechanical displays and additional components, including transducers and limit switches.

The failure modes, effects and diagnostic analysis (FMEDA) assessment of the design, carried out by test house Exida, permits operation of the RAMC even in safety-relevant systems that have to comply with the requirements for Safety Integrity Level 1 (SIL1) or SIL2.

According to estimates by Munich Re, there is a dust explosion in Europe everyday.

A particular risk potential is shown by the fact that even materials that are otherwise considered non-combustible can undergo explosion-like combustion when they are present in the form of a dust-air mixture.

In addition to avoiding gases and dusts and raising the awareness for the risk potential, structural measures and the use of suitable instruments and systems, such as the Rotameter RAMC flowmeter, are some of the most important safety measures that industry can adopt, according to Yokogawa.

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