CPI Waterproof Switch Panels

It’s not much of a stretch to take some of our panel mountable waterproof switches and package them into a custom panel that can be provided to manufacturers as a complete assembly. Many manufacturers find this more cost effective than doing the work themselves and we also become responsible for the testing and wiring of the switch and any special termination connectors, another headache removed.

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Dump Truck Safety System Design

The design of the modern work truck is moving forward at an amazing pace. With long haul trucks, the focus has been on collision avoidance systems and advanced controls for fuel economy, but dump truck builders have long had a different focus. For Dump Trucks, it’s all about safety. Historically, makers of class 8 dump trucks have not exactly been “early adopters” of technology, preferring instead to allow these


Lift Controls Reach New Heights With CPI Switches.

One of the more overlooked uses of CPI’s line of waterproof limit switches may be its selection for a wide variety of outdoor, harsh duty lift activation systems. These systems have a number of attributes that make CPI waterproof pendant switches a perfect solution:

  1. Lift switches are often hand actuated by humans.
  2. The switches are exposed to outdoor conditions of wind, dust, oil splashes or heavy rain or salt spray.
  3. The switches are


Top 5 reasons Your Waterproof Switches … Aren’t.

Engineers searching for electromechanical switches that are truly waterproof are generally doing so for a few common reasons:

  1. Their switch will be used outdoors. (ie. Lawn mowers, generator, etc…)
  2. Their switch may be fully submerged for periods of time. (Military Humvee’s, recreational vehicles, boating applications)
  3. Their switch has to be both waterproof and heavy duty to avoid general failure due to salt water, wind, sand spray, and other airborne or liquid particulates that may be


Thermal Switches for Military and Commercial Jets

In a past life I was privileged to work on the very first fly-by-wire system used on the F16. This was the first system of its type used in an operational jet fighter utilizing a quad redundant custom designed CPU and optical fiber to relay cockpit commands to control surfaces in a matter of milliseconds. Since then there have been thousands if not millions of improvements large and small to the F16 which remains a staple


Valve Position Sensing for Mission Critical Flow Applications.

Systems like municipal water supplies, sewage treatment plants, massive cooling and lubrication systems used in chemical, petrochemical, and the oil and gas industry, all share one thing in common: large flow valves that are critically opened and closed by computer controls to insure proper system operation, or prevent critical safety thresholds from being violated. Flow rates in these systems can be 10’s of thousands of gallons per hour at high pressure so valve control has


Pushing the Limit on Limit Switch Applications

As one of the world’s premiere suppliers of electromechanical, high endurance waterproof limit switches for over 70 years, CPI has accumulated quite the resume of interesting switch applications.  Our original customers were military and high endurance outdoor vehicles like dump trucks, cranes, backhoe’s, front-loaders, mining equipment etc… In general these engineers seek us out for a difficult application where requirements could not be met by existing suppliers. Often a design opportunity that went to


Our Waterproof Rocker Switches… Rock!

A quick web search for “Waterproof Rocker Switches” yields a universe of rocker switches, made for a universe of applications. Sadly even glorious Google can’t seem to completely sort out the waterproof variety from the more common standard PCB mounted round or rectangular versions and so it is for you the poor system designer to wade through this mess looking for the right rocker switch for your wet and watery application. Our own rocker switch makes


Push Button Switch Types

Engineers and system designers looking for reliable switch products often face a quandary. Selection of switches with their inherent mechanical limitations must be pondered carefully or they risk being the proverbial “weakest link” in an otherwise robust control or safety system design. When switches are directly operated by humans, the equation becomes even more complex. Tactile factors come into play, as well as consideration of the ergonomics of mounting and positioning these switches in vehicles or