FL-3539ST_FL-3540G_FL-3540ST_FL-3540C转子流量计OMEGA
Omega?精密可变面积转子流量计可测量空气、水和气体流量，精确度高达±2%fs，重复性高达0.25%fs（以“07”或“45”结尾的模型精确度为±5%）。这些单位的特点是一个易于阅读毫米尺度，并与空气和水的相关图表。刻度盘在计量管上以1 mm（3/32”）的增量熔合，使用户能够以最高精度读取流量。
刻度设计，其中一条垂直线贯穿刻度的长度并与水平刻度划分相交，减少视差和眼睛疲劳，从而确保高精度读数（见下页插图）。前面的聚碳酸酯树脂屏蔽也是弯曲的，作为放大镜，这产生了优越的性能比其他转子流量计的标准设计。
±2% FS Accuracy
Non-Rotating Seal Spindle
Easy-to-Read Scale Design
Special Dimensions for Interchangeability
The OMEGA? precision variablearea rotameters can measure flows of air, water, and gases, with up to ±2% FS accuracy and 0.25% FS repeatability (models ending in "07" or "45" have ±5% FS accuracy). These units feature an easy-to-read millimeter scale and come with correlation charts for air and water. The scale is fused on the metering tube in 1 mm (3/32") increments, which enables a user to read the flow rate with the highest accuracy.
The scale design, in which a vertical line runs through the length of the scale and intersects the horizontal scale divisions, reduces parallax and eye fatigue, thus ensuring highaccuracy readings (see inset, next page). The front polycarbonate resin shield is also curved to act as a magnifying glass, which yields superior performance over other rotameters with standard designs.
Non-Rising Stem Needle Valve
The 150 mm size flowmeters are also available with a non-rising stem type needle valve for special applications. This 15-turn metering valve has superior flow-rate control, and is particularly suited to use in chromatography applications. The sliding tapered-needle mechanism virtually eliminates sticking or buildup due to foreign matter in the fluid stream, without variations or saw-toothing of the flow rate.
Shielded for Pressurized Systems
These rotameters, with precisionbored borosilicate glass metering tubes, are fully shielded against breakage. A white opaque rear shield provides a background to aid in discerning the float position.
Panel Mounting Design
These rotameters are equipped with horizontal ports and NPT threads for easy panel mounting. The ports have external threads and are equipped with panel retaining nuts. No additional mounting hardware is required. Simply drill 2 holes 114 mm (4.500") apart (center to center) for 65 mm units, 224 mm (8.813") apart (center to center) for 150 mm units. Each hole should be 16 mm (5/8") in diameter.
