Cranes and Lifts Page Draft

Hi-Endurance Switching, Sensing
& Linear Position Sensors

Crane & Lift Manufacturers and Integrators –
CPI Safety Limit Switches and Sensors

The types and sizes of cranes used in the world vary enormously, from small hoists that can be mounted on your truck bed, to telescoping hydraulic crane systems rising hundreds of feet into the air able to lift hundreds of tons. It turns out that CPI waterproof switches, and linear position sensors find a home in these diverse implementations, solving a variety of sensing problems in crane mechanics. As always, the solutions we provide are are robust, no-nonsense, fully hardened, fully waterproof solutions. Our switches are meant to be the “final solution” to any and all challenging sensing environments on cranes and all sorts of commercial work trucks and vehicles.

Waterproof safety Limit Switches for
Crane and Lift Applications

CPI’s line of waterproof switches see’s usage in a variety of crane applications where a critical safety limit switch is needed that is potentially exposed to the elements. Because of the small form factor, sealed switch and leads, and high vibration immunity, our switches combined with one of our many mounting bracket options, demonstrate some of the highest electromechanical endurance to be found, up to 1 million cycles. Common applications include:

Anti Two Block Prevention – Also referred to as the “ulitmate limit”, CPI limit switches alert operators so as to prevent over-hoisting of the hook assembly. In this application our J4 hardened ball switch is commonly used. See anti-two-block switch for a more detailed discussion of this application.
Outrigger Locked Detection – In this critical crane safety application, either our E1092 or our E1127 has been used. The CPI switches have a number of characteristics that made them perfect for this application.
1. CPI switches were small enough to be mounted inside the outrigger tube there by protecting them from outside damage.
2. CPI switches are truly waterproof thereby protecting the switch from a harsh and potentially wet outdoor environment.
3. CPI switches are pre-wired and available with a waterproof connector thereby greatly reducing assembly time and failure modes and further increasing durability.
Hoisting Motion Arrest – Limit switches from CPI can be used here to both detect hoist position and to slow or arrest it before it reaches end of travel.
Position Detection – In some crane applications, limit switches can be used to detect travel motion to prevent impact at stop ends. These limit switches can provide consistent fixed calibration points that act as a double check on crane position and sway control height. In some applications a linear position sensor may be more appropriate to determine the extension of long stroke hydraulic cylinders. Our SL Series LInear Position Sensors were made for this.

Crane and Lift applications include:

Related Switches

E1333
Waterproof Switch
Panel

OEM’s may be interested in our switches pre-mounted in a variety of standard or custom steel or aluminum panels. Along with the switch electrical and tactile parameters, you can specify lead lengths and custom terminations to be applied at our factory. We will then test it, and ship you the completed assembly for ease of integration. These panel assemblies are very popular for operator control of crane, winch and liftgate operations.

E1134
Waterproof Switch
with SPDT

Control Products’ E1 Series, Waterproof Roller Lever limit switches can economically solve tough application requirements, where other roller limit switches fail or are unreliable.

The Stainless steel bracket coupled with our santoprene sealed, truly waterproof pendant switch make a powerful combination that has been tested to operate up to 1 million cycles, depending on current requirements.

E117-525
Hi-Endurance Waterproof Switch

This switch combines our E1117 stainless steel roller lever actuator, with our B9113 SPDT low-pushbutton waterproof switch.

Designed for high durability and outdoor use, this commonly used limit switch configuration boasts an extended temperature range (-40F to 221F) coupled with extreme environmental durability and long cycle life. This version is with angle bracket mounting but other options are available.

SL2000 Internal
Mount Safety Rated
Linear Position Sensor

Hydraulic cylinders used in large cranes need reliable and robust position feedback over very long strokes.

A draw-wire hydraulic position sensor like the CPI SL series was truly made for this application. Mount it outside or inside the cylinder fully ATEX & IECEx certified. Our SL Series is design hardened and is suitable for both subsea and surface deployments with stroke lengths to 10m.