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Flowmeter for use in potentially explosive areas

19 June 2009

The Yokogawa Rotameter RAMC flowmeter has been certified for use in areas with a risk of gas explosions and of dust explosions. The instrument now comes with many Ex certificates that are valid in Europe, America, Australia, China and many other countries.

Flowmeter is certified for use in potentially explosive areas

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...T6 or II 2D Ex tD A21 IP67 T1...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.

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

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