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Sensor Type
Door / Window
Surface Mount Sensor
Contact Closure / Relay
Ease of Installation
Intermediate (Installs < 60 minutes)
United Security
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Compact, Powerful Contact for Overhead Doors
United Security Products BP-33-A Mini Overhead Door Contact, Wide Gap
United Security Products BP-33-A Mini Overhead Door Contact, Wide Gap
United Security Products BP-33-A Mini Overhead Door Contact, Wide Gap
Item# 79639
Price: Normally $22.80 
Hot Deal $11.81
Free shipping on orders over $175 - See Details


  • Extra wide 2.25" gap
  • Rugged aluminum construction
  • Miniature 3.5" x 1.5" size
  • Premium rhodium metal contacts
  • Alnico 5 magnets
  • Closed circuit
  • Armored stainless steel cable, 18" length L bracket

Essential Info

The BP33-A contacts are designed for use on industrial or residential overhead doors. The BP3-A is also ideal for any other large or loose fitting doors. The switch is contained in an aluminum casting and secured with a high grade epoxy seal. The premium Alnico 5 magnet is contained in a plastic casting and secured with the same high grade epoxy seal. An aluminum "L" bracket is provided with the magnet allowing adjustable mounting of the spacing between the switch and magnet. The wiring of the switch is protected in a flexible stainless steel tube. The BP33-A switches are completely waterproof and hermetically sealed, therefore allowing them to be used in all exposed applications.
Important notes:
Defective exchanges for identical item within 30 days of purchase. After 30 days, please contact the manufacturer.
Manufacturer contact information: United Security Products Inc / Emer Call, Tel: (858) 413-0149


2 Ratings
5 star: 50%  (1)
4 star: 50%  (1)
3 star: 0%  (0)
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Average Customer Rating
(2 customer ratings)
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DARRELL JAY -- mustang, OK   8/8/2011
If this is the type of switch you are needing, look no further. The BP33-A overhead door contact is first rate, and its made in the USA. Always buy "Made in the USA" when possible.

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