Three-Tube Anaesthesia Flow Meter has borosilicate glass tubes which are ground and polished to a high precision internal taper. S.D. Process Equipments manufactures Three-Tube Anaesthesia Flow Meter. S.D. Process Equipments also manufactures various types of Flow meter and Rota meter. The Three-Tube Anaesthesia Flow Meter has float made using anodized aluminium. This Flow Meter is calibrated and these are permanent markings on the markings on the glass surface. This Flow Meter is available in an anodized aluminium/powder-coated frame.