The Switch,liquid Level, cataloged under National Stock Number 5930-01-211-9061, is classified within Federal Supply Class 5930 (Switches) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Setra Systems, Inc. Dba Gems Sensors. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5930-01-211-9061 |
| Primary Part Number | LS-57540 |
| Item Name | Switch,liquid Level |
| FSC / FSG | 5930 / 59 — Switches |
| Manufacturer | Setra Systems, Inc. Dba Gems Sensors |
| Status | ACTIVE |
| Relay | NOT INCLUDED |
| Actuation Method | BUOYANCY |
| AC Voltage Rating | 50.0 VOLTS MINIMUM AND 250.0 VOLTS MAXIMUM FIRST OPERATING POWER RQMT |
| Overall Diameter | 4.500 INCHES NOMINAL IN |
| Current Rating at Maximum Rated Voltage | 0.06 AMPERES NOMINAL LOAD AND 0.04 AMPERES NOMINAL LOAD |
| DC Voltage Rating | 50.0 VOLTS MINIMUM AND 250.0 VOLTS MAXIMUM FIRST OPERATING POWER RQMT |
| Mounting Method | FLANGE |
| Contact Arrangement | SINGLE POLE,SINGLE THROW,NORMALLY OPEN,LEVEL 2; SINGLE POLE,SINGLE THROW,NORMALLY CLOSED,LEVEL 1 |
| Mounting Position | VERTICAL |
| Maximum Current Rating | 0.3 AMPERES RESISTIVE LOAD |
| Connector Identification | 10-214218-4P |
| Float Effective Travel | 9.500 INCHES NOMINAL IN |
| Float Quantity | 2 |
| Liquid Type for Which Designed | HYDRAULIC FLUID AND LUBRICATING OIL AND SEA WATER AND VARIOUS FUELS AND WATER |
| Operating Temp Rating | 180.0 FAHRENHEIT MAXIMUM DEGF |
| Electrical Connection Type | CONNECTOR RECEPTACLE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| LS-57540 PRIMARY | Setra Systems, Inc. Dba Gems Sensors (USA) |
| Reference | Meaning |
|---|---|
| 57540 | C/1 Advisory reference — outside the item-of-supply concept Setra Systems, Inc. Dba Gems Sensors |
NSN 5930-01-211-9061 is a Switch,liquid Level, manufactured by Setra Systems, Inc. Dba Gems Sensors, classified under FSC 5930, Switches. Status: active.
NSN 5930-01-211-9061 has 1 manufacturer part number on file: LS-57540 (Setra Systems, Inc. Dba Gems Sensors).
1 possible match (shared part number, not a government interchangeability claim): 6625-01-664-6726. Verify interchangeability with system specifications before substitution.
Key specifications for LS-57540: Relay: NOT INCLUDED; Actuation Method: BUOYANCY; AC Voltage Rating: 50.0 VOLTS MINIMUM AND 250.0 VOLTS MAXIMUM FIRST OPERATING POWER RQMT; Overall Diameter: 4.500 INCHES NOMINAL IN. 16 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.