Non-Contact Cylinder Position Sensing
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Proximity switches affixed to pneumatic cylinders replace externally mounted limit switches, proximity switches and other externally mounted sensing devices used to indicate the mid-stroke or the near end of cylinder stroke travel in either the extended or retracted position of the cylinder piston rod. Because the customer does not have to incur expenses to design or manufacture the brackets necessary to mount an external switch, cost savings are usually realized. In addition, there is no physical contact of the switch by any moving parts of the cylinder and the switch sensing probe is not subject to external contamination. Because of the above two facts, these switches usually have a much longer life within the manufacturing system where they are placed. Peninsular has extensively tested both types of proximity switch technologies mentioned below and has a proven track record of success with the utilization of this technology. |
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Our LM cylinder may be manufactured to incorporate the use of both these technologies ! |
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Magnetic Piston Sensing Technology |
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Tie Rod Mounted Proximity Switch for Mid-Stroke Sensing ( NOT Configurable Herein - Call Peninsular ) for Model LM Medium Duty Aluminum Cylinders Only |
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Tie Rod Mounted Proximity Switch |
Tie Rod Mounted Proximity Switch shown affixed to the Tie Rod of our Model LM Air Cylinder shown with Cord Set attached |
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Although this tie rod mounted proximity switch technology cannot be configured within our configurator, you may contact us (see below information) if you want to order this technology with any Peninsular model LM or ILM pneumatic cylinder. Magnetic piston sensing consists of a magnet encased around the circumference of a piston that can be sensed by one or more proximity switches affixed to the tie rod of an aluminum cylinder. These switches can be affixed anywhere on the tie rod of the cylinder to sense the cylinder stroke in any target area, along the cylinder stroke path. We have conducted significant testing on different kinds of magnet materials, shunting devices and tie rod mounted proximity switches to provide the highest degree of assurance for producing reliable and repeatable tie rod mounted proximity switch actuation for our model LM and ILM aluminum pneumatic cylinders. Special rare earth materials are used for the magnets along with other engineering features that provide the maximum gauss strength at the surface of the cylinder tube, thus, providing assurance of “making the switch” on every stroke of the cylinder. Inductive magnetic proximity switches, with no moving parts or physical contact inside the switch, are employed for additional assurance of a reliable and repeatable high quality sensing system that works harmoniously with all Peninsular Model LM and ILM aluminum pneumatic cylinders. When magnetic piston sensing is selected, a /M appears in the Peninsular part number once it is generated by this configurator. When employing this technology it is important to know that there are many different sensing systems engineered into aluminum air cylinders found in todays marketplace, and it is the users responsibility to make an informed decision, which entails full knowledge of the application, when making the cost vs. quality decision for employing this technology. Only Peninsular approved inductive magnetic proximity switches should be used with our model LM and ILM aluminum pneumatic cylinders, the use of any other proximity switches, not approved by Peninsular, will not be covered by the Peninsular cylinder warranty. Cord sets are to be ordered separately and come in various lengths, contact us toll free at (800) 526-7968 in the USA or Canada or at (586-775-7211) or you may email us at sales@peninsularcylinders.com.
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In-Port Cylinder Head Mounted Proximity Switch Technology |
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Only Peninsular approved RF output proximity switches are to be used with our cylinders; the use of any other proximity switch, not approved by Peninsular, will void our cylinder warranty. All switches capable of rotating 304° and contain a large mini connector for cord set attachment. Cord sets are to be ordered separately and come in various lengths - contact Peninsular. Proven and Tested in well over 250,000 Peninsular Air Cylinders since 1988 ! |
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In-Port Cylinder Head Mounted Proximity Switch |
In-Port Cylinder Head Mounted Proximity Switch shown affixed to the Rear End Cap of our Model LM Air Cylinder with Cord Set attached |
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You may configure your Peninsular cylinder with the switch mounted to either end or both ends of our model LM medium duty aluminum air cylinder or our model MH heavy duty all steel air cylinder. Our model LM aluminum cylinder can be made to utilize magnetic piston sensing as well. RF (radio frequency) output inductive proximity switches can by integrally mounted to Peninsular air cylinder heads here at Peninsular's factory with the switch probe descending through the cylinder port as a configurable option available to our customers. Our technology allows the same switch probe length to be used at each cylinder end without the use of shims or spacers underneath the switch. The use of shims and spacers, a common practice in today's cylinder industry, also increases the potential for unreliable switch actuation and repeatability (see drawing #1 and drawing #2 below). In addition, we incorporate the use of only one proximity switch probe length for 1 ½" through 3 ¼" bore sizes ! Please reference the chart below for proximity switch probe lengths that we use on both ends or either end of Peninsular air cylinders for bore sizes 1 ½" through 14".
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Drawing #1 - Traditional Design A Different Switch Probe Length is often used on the Rear End Cap than on the Front End Cap because both Piston Cushions have different Diameters. This is a Common Practice in Today's Cylinder Industry.
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Drawing #2 - Peninsular's Improved Design The same Switch Probe Length is used on both Peninsular Cylinder End Caps because both Precision Machined Piston Cushion Hubs have the same Diameter and Precision Machined Cylinder End Caps are Employed You may Configure your Peninsular Cylinder using this Reliable and Repeatable Technology
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Toll Free: 800-526-7968 Phone: (586)
775-7211 Fax: (586) 775-4545 |
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