Thermal mass flow meter

Engineers in search of an accurate flow measurement solution for process gas, fuel gas, inert gas or waste gases as well as air in small line sizes will be pleased to learn that the ST75 Flow Meter from Fluid Components International is now ATEX and IECEx approved for safety in hazardous and potentially explosive plant environments.

Designed for line sizes from 6 to 51mm, it provides three unique outputs: the mass flow rate, totalized flow and media temperature. It is suited for applications in a wide range of industries including chemical, electric power, food/beverage, advanced materials, pharmaceuticals, semiconductor and more. The meter is equally well suited for low flow and high flow operations. It operates over a wide flow range, from 0.01 to 950 NCMH depending on line size. For variable process conditions, itis factory preset to a wide turndown range at 10:1 to 100:1.

The ST75 is remote mountable for equipment crowded plants or hazardous factory areas. It features fully scalable 4-20mA and 0-10V standard outputs.  They are user assignable to flow rate and/or temperature and a 0-1kHz pulse output of total flow. It can be ordered for input power with either 18 to 36 Vdc or 85 to 265 Vac, with or without a built-in LCD digital display.  

The instrument includes a rugged sensing element constructed with all welded 316 stainless steel and Hastelloy-C tips. It is enclosed in a rugged, all-metal, dust and water resistant NEMA Type 4X (IP66) rated package designed for hazardous area installations. ATEX/IEC approvals include: Zone 1, II 2 G Ex d IIC T6 . . . T3; II 2 D Ex tD A21, IP67 T90º . . . T300º.