UNS-MS or VA 1/8 NPT-BN25 (formerly BLS 1700)

  • Compact size for easy installation
  • Ideal for small tanks & vessels
  • Reversible switch logic
  • Broad media compatibility
  • All models incorporate hermetically-sealed, magnetically actuated reed switches
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Barksdale's single-point float-type level switch provides a variety of solutions for your specific level control problems. Series UNS-MS or VA 1/8 NPT-BN25 Level Switches are ideal for general level measurement in tanks or containers. This series features an intermediate size float. Switch polarity on all models can be changed from normally-open to normally-closed by simply rotating the float 180 degrees. For your level switching and control needs requiring only a single float, Barksdale's UNS Series Level Switches are the ideal solution.


General Specifications

Switch Rating:
NO/NC: 230 VAC/DC-2A; 40 VA/W
150 VAC/100 VDC; 0.2A, 3VA/W
Switch Configuration: Shipped as Normally Open as standard. Can be changed to Normally Closed by rotating fl oat 180°.
Contact Mode*: 1 – SPST-switch (NO)
2 – SPST-switch (NC)
3 – SPDT-switch
Wetted Parts:
Brass (MS) or stainless steel (VA)
NBR foam (BUNA)
1/8” NPT male
Electrical Connection: PVC cable max 3 x 0.34mm2
1m/3m/5m in length
Minimum Specific Gravity:
NBR Foam (BUNA) float:
0.57 g/cm3
Protection Class: IP54
Operating Temperature: -4° to +220°F (-20° to +100°C) – oil
-4° to +180°F (-20° to +80°C) – water
Operating Pressure:
NBR Foame Float (BUNA):
220 psig (15 bar)
Weight: Approx. 40 grams (1.4 oz.)
* The contact modes (NO or NC) are defined on the basis of an empty tank and for a level switch mounted through the top.


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