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Float switches are used to trip high/low level alarms, engage relays, control or start/stop pumps, open/close valves etc. They are a simple, inexpensive way to provide independent or redundant setpoints for emergency shut-down or backup. |
| Accuracy/Repeatability | +/- 0.1 inch; 0.030 inch |
| Switch Type | Single and Multi-Point Magnetically Actuated Reed: SPST N.O. or N.C. (std.); Optional SPDT |
| Wattage | 50W (std); 100W & Higher Optional (Consult Factory) |
| Mountings | 1/8" thru 2" NPT or ANSI Flanged; Top, Side (Horizontal or 90º EL) or Bottom; Adjustable Location Optional |
| Electrical Connection | Conduit Connection 1/2" NPT with Pig-tail Leads (std.) |
| Maximum Length | Unlimited |
| Stem/Float Materials | Plated Brass, Stainless Steel 316, Buna, PVC, Polypropylene, Nylon, Teflon, Kynar |
| Wiring | 22 AWG SPST; SPDT with Individual or Common Lead Wiring; Color Coded, as Applicable |
| Voltages | 0 to 240 VAC/DC |
| Temperature | To 300F* (Up to 550F Optional) |
| Pressure | To 900 PSI* |
| Minimum S.G. | From 0.30* |
| Enclosures | General Purpose, Weatherproof, Watertight, Explosion Proof |
| Intrinsically Safe | Optional - Requires Barrier (Consult Factory) |
| Other Options | Combination Float & Temperature Switch (Up to 100º in
5º increments +/- 3ºC) Slosh Shield |
| *Limitations Vary Depending on Materials, Temperature and Pressure. |
Float switches are often furnished with Level Alert Alarm Systems to
provide an audible, visual and relay output response to high/low and other alarm conditions.
These microprocessor based alarm systems are expandable and may be activated by: Continuity, AC
or DC Voltages, and Current Loops. (See Uehling Bulletin 492P98).
Level Alert Alarm Systems may be optionally provided in convenient factory-assembled NEMA 12
Oil Tight, NEMA 4X Watertight and NEMA 7 Explosion Proof enclosures.
Bulletin FL498