UNS-VA1/4-VA52 Stainless Steel Level Switch 1/4 NPT from Barksdale

UNS-VA1/4-VA52 Stainless Steel Level Switch 1/4 NPTThe Stainless Steel Level Switch ? NPT (UNS-VA1/4-VA52) is a rugged, corrosion-resistant single-point liquid level switch crafted for industrial and process applications. Constructed from stainless steel, it offers reliable performance over a wide temperature range of –40 °C to +150 °C and supports top or bottom mounting via a ?″ NPT thread. It ships in a normally-open configuration, but users can convert it to a normally-closed contact simply by rotating the float 180°. Ideal for monitoring levels in tanks, containers, and process systems, this switch combines durable materials, flexible installation, and broad compatibility to meet demanding operational requirements.

Features

UNS-VA1/4-VA52 Stainless Steel Level Switch 1/4 NPT Features:

  • G1/4" - Mounting thread
  • 1 switch contact
  • Mounting through top or through bottom
  • Max. operating temperature: -40°C...+150°C

Specifications

UNS-VA1/4-VA52 Stainless Steel Level Switch 1/4 NPT Specifications:

ParameterSpecification
Switch RatingSPST: 250 V AC/DC; 3.0 A / 100 VA/WSPDT: 140 V AC/DC; 1.0 A / 60 VA/W
Switch ConfigurationShipped as normally open as standard; can be changed to normally closed by rotating float 180°
Contact Mode1 - SPST (NO)2 - SPST (NC)3 - SPDT
Wetted Parts – Stem316 stainless steel (VA)
Wetted Parts – Float316 stainless steel (VA)
Mounting1/4” NPT male
Electrical ConnectionPVC cable, max 3 x 0.34 mm2, 1 m / 3 m / 5 m length
Minimum Specific GravityStainless Steel Float: 0.78
Protection ClassIP54
ApprovalsUL/CSA: Pending
Operating Temperature14° to +220 °F (-10° to +105 °C), PVC cable
High Temperature Option-40° to +302 °F (-40° to +150 °C), silicone cable (-HT), consult factory
Operating PressureStainless Steel Float: 580 psig (40 bar)
WeightApprox. 150 g (5.3 oz)

Applications

UNS-VA1/4-VA52 Stainless Steel Level Switch 1/4 NPT Applications:

General level measurement at:

  • Tanks
  • Containers
  • Storage tanks for water
  • Process industry

Q & A

Q&A Section with Expand/Collapse Icons

UNS-VA1/4-VA52 Stainless Steel Level Switch 1/4 NPT Q & A

+ What is the Stainless Steel Level Switch ? NPT used for?
This switch is intended for general level detection in tanks, containers, and process systems. It is suited for industrial, chemical, or fluid applications requiring corrosion resistance and reliable single-point switching.
+ What materials are used in its construction?
The wetted parts (stem, float, etc.) are made of stainless steel (VA) to resist corrosion and handle aggressive media.
+ What is the mounting thread?
It uses a ? NPT (1/4 NPT male) mounting thread.
+ What are the operating temperature limits?
The switch supports a broad temperature range — as low as –40 °C up to +150 °C, depending on cable and variant.
+ What is the minimum fluid specific gravity for proper function?

The stainless steel float version requires a minimum specific gravity of 0.78 to reliably actuate.

Downloads

Download UNS-VA1/4-VA52 Stainless Steel Level Switch 1/4 NPT Datasheet

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