Designed for direct read flow rates, the FLD Series rotameter is a precision instrument embodying the
inherent simplicity, versatility and economy of the classical rotameter. It is particularly suitable for
metering carrier gases in chromatography, indicating and controlling gases in manufacturing processes,
liquid and gas measurement in laboratories, pilot plants, flow and level indicating, etc. Shipped
completely assembled, flow meters include standard mounting fittings in a choice of materials, side
plates, thick protective magnifying front shield and back plate, built-in control valve, and flow tubes.
Panel mounting style is convertible to bench mounting through the use of the optional acrylic tripod,
FLTR-1. The tripod has a built-in spirit leveler and leveling screws.
Meters come with built-in 6 turn needle valves, high precision metering valves with “non-rising stems”
16 turn, or with no valves. The higher cost of the high resolution valves is justified whenever high
sensitivity control and resolution are desirable-particularly in conjunction with metering tubes of very
low flow rates. Generally, for gas metering it is recommended that valves are positioned at inlets
(bottom) for liquids valves may be positioned either at inlets or outlets (top). For vacuum services,
valves must be mounted at outlets. If unspecified at the time of ordering, meters will be shipped with
valves mounted at the inlets.
SPECIFICATIONS Standard Accuracy: ±5% of full scale (FS) Repeatability: ±0.25% Useful Flow Range: 10:1 minimum Maximum Operating Pressure: 200 psig/13.8 bars Maximum Operating Temperature: 121°C (250°F)
Construction Flow Tubes: Heavy walled borosilicate glass Floats: Glass, red sapphire, 316 stainless steel, carboloy and tantalum Choice of Mounting Fittings in Contact with Fluids: Aluminum, black anodized or 316 stainless steel Side Panels: Aluminum, black anodized Front Shield: Polycarbonate resin with longitudinal magnifier lens for enhanced reading resolution Back Plate: 1/8" thick white acrylics O-Rings and Packing: Buna O-rings in aluminum/brass model. FKM O-rings in stainless steel meters Optional: Perfluoroelastomer and EPR Connections: 1/8 NPT female inlet and outlet connections
† All dollar amounts on this site are shown in US currency.
Note: Comes complete with operator's manual.
Minimum flow rate is 10% of the maximum rate shown.
“G” suffix denotes glass float, “ST” suffix denotes 316 SS float, “C” suffix denotes carboloy float and “S” denotes red sapphire float.
For units without valve, add suffix "-NV" to model number and subtract $10 for aluminum; subtract $13 for for 316SS.
For 16 turn, high resolution non-rising stem valve for 150 mm rotameters, add suffix "-HRV" to model number and add $60 for aluminum units and $120 for stainless steel units.
For O2 Cleaning add "-O2CLEAN" to the part number and $125 to the price.
No NIST traceable calibration is available.
(OPTIONS SHOWN IN THIS "NOTE" ABOVE ARE PRICED IN US$)
Ordering Example: (1) FLDN3501ST 6 turn valve stainless steel unit, with 316SS float, range of 1.6 scfm nitrogen, $300.00