Precision Switching Products
& Linear Position Sensors
Unique in the industry are CPI’s SL series of draw wire linear position sensors. These products leave traditional notions of draw wire sensors behind, with their advanced metallurgical design, patented linear to rotary to linear conversion, and hardened absolute measurement technology featuring either short magneto strictive, or LVDT based transducers.
SL2000-6000 products combine two proven technologies into a sensor system that can be deployed in subsea applications and are available with virtually any intrinsic safety rating for topside hazardous locations as well. Our advanced harsh duty draw wire mechanisms work together with short probe magneto strictive transducers to provide a solution to long stroke, harsh duty hydraulic cylinder piston position measurement that is better in every way than the sum of its parts.
Monitoring absolute piston position in hydraulic accumulators has been a nightmare for designers, as traditional rod-type solutions require an additional dynamic seal around the probe (through the center of the piston). Fabrication challenges, additional seal leaks, and sagging probes in long-stroke applications are among the pitfalls of this approach. The CPI draw wire sensor overcomes all of these issues, offering internal mount as well as external mount configurations which minimize impact on accumulator design.
CPI Sensors represent the only internal sensor technology in the world suitable for long-stroke telescoping cylinders. We offer various installation options, including completely internal units suitable for dual-clevis designs. And, with the integration of magnetostrictive core sensors, all hazardous environment capabilities are at your disposal
Designed especially for the needs of the Oil & Gas Industry, the CPI sensor system provides one uniform solution to position measurement both on the drilling platform and at the well head. Systems such as Blow-Out Preventers, or Heave Compensation Systems that use hydraulic cylinders or accumulators will find our Safety Rated sensors the perfect solutions to reliability and durability concerns both above and below the surface. Since magneto strictive sensors are available in intrinsically safe, as well as explosion proof variations, with various ATEX, SIL, and IECeX ratings for virtually any hazardous environment, these capabilities translate directly to our SL Series draw wire products.
Monitoring absolute piston position in hydraulic accumulators has been a nightmare for designers, as traditional rod-type solutions require an additional dynamic seal around the probe (through the center of the piston). Fabrication challenges, additional seal leaks, and sagging probes in long-stroke applications are among the pitfalls of this approach. The CPI draw wire sensor overcomes all of these issues, offering internal mount as well as external mount configurations which minimize impact on accumulator design.
CPI Sensors represent the only internal sensor technology in the world suitable for long-stroke telescoping cylinders. We offer various installation options, including completely internal units suitable for dual-clevis designs. And, with the integration of magnetostrictive core sensors, all hazardous environment capabilities are at your disposal.
Additionally CPI makes a line of linear position sensors designed to drop in replace magnetostrictive sensors in any hydraulic cylinder application. Read about our Magnetostrictive position sensor replacement series here.
CPI sensors are a subset of a class of sensors historically referred to as draw-wire or “string-pot” sensors, designs that many design engineers are familiar with. However, that is where the historical similarity ends. In CPI’s completely new approach to this sensor class, there is no string and there is no pot! Instead the inherent stability and simplicity of this proven class of sensors is improved from head to toe through material science engineering with a patented linear to rotary to linear mechanism at its core. By teaming this precise translating spool system with either a short rod magneto strictive sensor or a Linear Variable Differential Transformer (LVDT), we achieve a 100% non-contacting, highly accurate sensor that outlasts and outperforms all other draw wire and hydraulic sensor technologies in this application space.
The advanced design of the CPI SL series sensor is also a highly accurate solution and versatile solution with numerous advantages over other technologies for long stroke, harsh duty deployment. Click HEREto The Pitfalls of Draw Wire Sensors Overcome by CPI SL Series Sensor Systems.
Our LVDT and magnetostrictive -based Linear Position Sensors find applications everywhere from the high temperature environment of a steel mill cauldron control, to the corrosive undersea world of oil exploration; not to mention everywhere in between where harsh environments and maximum durability and reliability are a concern.
For 15 years now, CPI linear position sensor technology has marketed and refined its harsh duty draw wire sensor technology to the point where it has gained wide acceptance into hundreds of applications around the world as a robust and cost-effective solution. In fact, it is often the only real solution to the position sensing challenges of large hydraulics under extreme conditions. Our sensors have been deployed on Navy vehicles, Oil platforms, as valve position feedback, and on huge heavy duty construction vehicles used in mining, and drilling operations. We’re in the oil exploration industry, the construction industry, the mining industry, and the power industry to name a few. Anywhere that uses big hydraulics, in challenging conditions, you’ll find CPI.
Contact Our Engineering Sales Team for More Information at (973) 887-9400.
