Gas Mass Flow Control

Bronkhorst High-Tech announced a range of Atex approved gas flow meters and controllers for use in Zone 1 hazardous areas, or on flammable gases. To achieve the certification for the thermal mass flow measurement technique, the company's Ex-Flow system has an intrinsically safe measurement head, and gives flow measurement accuracy of 1% over a 50:1 measuring range. The instruments are available with compression type process connections, suitable for gas flow ranges of 0–7.5 mln/min, or in flanged or wafer style construction to fit from 28 mm (1.5'') to 250 mm (10'') line sizes, where flows of up to 11,000 m3n/h can be measured.