Used for flow measurements in the lab, process flows in pilot plants, metering carrier gases in chromatography, indicating and controlling gases in manufacturing processes, and for indicating flow rates in pumping or flow systems. Formed from heavy-walled, shock-resistant borosilicate glass, these flowmeters can be used at operating pressures up to 200 p.s.i.g. and maximum temperatures of 121°C (250°F). They feature fused ceramic scales that are accurate to within ±2% of full scale. Repeatability is 0.25%. Uniformly tapered bores have internal rib guides to stabilize the glass, stainless steel or carboloy floats. Flow measurement is taken by reading the center of the float on the universal scale. The number on the scale corresponds to a flow rate for the given fluid or gas on a calibration chart that is supplied. Flowmeters are available in four styles. 65mm scale, sizes 1-6 and 150mm scale sizes 1-5.
Millimeter scales indicate the height to which the float rises within the flowmeter and are correlated with specific flow rates through the use of appropriate calibration data sheets or curves. Scales of this type permit utilization of a given flowmeter for a great number of different fluids at diverse pressure and temperature conditions.
Flexible tubing is connected directly to the top and bottom of the flowmeter and can be held in place with a clamp. Maximum pressure is 200 p.s.i.g., maximum operating temperature is 121°C (250°F).