Float Switches

Our Bulletin 840 Float Switches are heavy-duty industrial control devices. They open and close contacts in response to changes in liquid level. These switches are available in five different styles with both motor and pilot duty contact ratings.

Bulletin 840 Float Switches
  • Overview
  • Product Selection
  • Specifications
  • Documentation
  • Resources
  • Applications

Features

  • Contact ratings NEMA A600 and N300
  • Operating sensitivity from 2...5 in.
  • Most models can be converted between tank and sump operation
  • Eleven standard float switch operator assemblies available
  • Rods, floats and cables are stainless steel
  • Available in Type 1, 4 and 7/9 enclosures

To view commonly ordered and quickly available products, use the Product Configuration Assistant for our complete product offerings.

Specifications

TitleNumberDownload
Condition Sensing Technical Data836-TD001

Certifications

  • CE Marked for all applicable directives 
  • CSA Certified
  • UL Listed

Certifications apply when product is marked. See our Product Certification site for Declarations of Conformity, certificates and other certification details.

File & Guide Numbers Bulletin 840

 

UL   CSA  
File Number Guide Number File Number Class
E14842 NKPZ, NKPZ7 LR1234 3211-06
E53048 (Haz. Loc.)⋆  NOWT    

 Hazardous Location Enclosure not CE compliant.

⋆ Style A is listed for hazardous locations. Styles B, C, D, and DS are not.

Standards Compliance

  • UL 508
  • UL 698 (Haz. Loc.)
  • UL 1604 (Haz. Loc.)
  • CSA 22.2 No. 14
  • NEMA ICS-2

Product Certifications

See our Product Certification site for Declarations of Conformity, certificates and other certification details.

Documentation

TitleNumberDownload
Condition Sensing Technical Data836-TD001
Bulletin 840 Float Switch Installation Instructions840-IN001
More Condition Sensing publications in Literature LibraryAll Languages

Can’t Find What You Need?

Browse Literature Library where you can search for additional technical and commercial publications in more languages.

Product Certifications

See our Product Certification site for Declarations of Conformity, certificates and other certification details.

Configuration & Selection Tools

  • CrossWorks — Convert competitive catalog numbers to similar Allen-Bradley® products.
  • ProposalWorks — Build complete quotes and proposals.

Other Resources

  • Procurement Specifications — Visit our online resource to find the procurement specifications for this product.
  • Knowledgebase — Visit our online resource for technical information, support chat and forums, software updates, and product safety advisories/notices.


Applications

Typical applications for Bulletin 840 Float Switches include:

  • Storage tanks
  • Water treatment plants
  • Water/waste water treatment plants

Essential Components Case Studies — View our case studies site to discover how customers have applied Allen-Bradley components in their applications.