Thermo Fisher Scientific
The GFM Pro Flowmeter (photo) continuously measures gas flows in realtime for accurate and reproducible chromatography analysis. With the capacity to measure both positive and negative vacuum flows from ±0.5 to 500 mL/min, the CE-certified probe can measure volumetric flow of any gas with an accuracy of ±2%. The unit also protects itself against excessively high flowrates by deploying an automatic shutoff when the measured flow exceeds 600 mL/min. — Thermo Fisher Scientific Inc., Milford, Mass.