Designed according IP65 requirements for dust- and water-proof operation, the new In-Flow CTA mass flowmeters (photo) work on the basis of direct through-flow measurement (no bypass), following the constant-temperature-anemometer principle. The modular, rugged construction contains no moving parts and has no obstructions to the flow path, which makes the instruments ideal for low pressure-drop applications and virtually insensitive to moisture or particulates. ATEX approval covers use in Category 3, Zone 2 hazardous areas. The flowmeters can be combined with integrated or close-coupled control valves to form compact, digital mass-flow controllers, covering the range of 10–200 mL/min up to 50–5,000 L/min. — Bronkhorst High-Tech B.V., Ruurlo, The Netherlands