Aalborg Model G

blending of two or three gases with gas proportioners obviates the need for: ordering fixed gas mixtures contamination from reusable gas cylinders potentially inaccurate mixtures by gas suppliers rib-guided or fluted metering tubes facilitate stable/accurate readings magnifier lens in front shield to enhance reading resolution interchangeability of flowtubes and floats OPTIGRAD™ scales minimize parallax and eye fatigue simple means of panel mounting