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Key Instruments announces the introduction of the GD Series, a full line of glass tube flowmeters that incorporate direct reading scales instead of reference scales. Previously available as special order items, these are now part of the general catalog offering. In addition to air, both 65mm and 150mm sizes are available for Argon, Carbon Dioxide, Helium, Hydrogen, Nitrogen, Oxygen, and Water. They can be configured with standard or precision inlet valves or standard outlet valves, aluminum, brass or stainless steel fittings, and BUNA or Viton elastomers. Other seals are available upon request.

Glass tubes are compatible with many fluids plus the E-Z Change design allows for quick tube substitution The 180º rotating lens provides excellent visibility.