IP67-Rated Linear Potentiometers for Harsh Environments


Gefran, a leading manufacturer of sensors and control instrumentation for process automation and control, announces a new group of linear displacement potentiometers suitable for use in harsh environments, as well as an extended warranty and several design enhancements to its well known LT linear displacement potentiometer. Addition of the LT67, PC67, PZ67-A and PZ67-S models with IP67 rating expands Gefran’s ability to meet a wide range of position measurement and installation requirements. Patent pending innovations make it possible to install these well-known potentiometer designs into environments where complete resistance to dust, or temporary resistance to the effects of liquid immersion (to a depth of 1 meter), is required. Gefran has also made enhancements to better protect the potentiometer against damage caused by the external formation of ice on the displacement rod. A patent-pending sealing system has strengthened the PC Series’ structure, providing greater durability and reliability in the harshest environments. Model PC67 provides standard stroke length options from 50…750mm and features an M12, 4-pole electrical connector. A self-aligning ball-joint located at each end of the shell allows easy installation. A high protection level and very small size make Models PZ67-A and PZ67-S unique in terms of reliability and flexible installation. Model PZ67-S features an M12, 4-pole electrical connector and installs using standard mounting brackets, while the Model PZ67-A features an M18, 3-pole connector and is installed using the self-aligning ball-joint located at each end of the shell. Both models offer standard stroke length options from 25…300mm. Gefran’s new IP67 rated Model LT67 is ideal for plastics processing applications with installation in areas highly exposed to lubricants. A mounting channel has been added to the cap on the rod-end for applications that require the potentiometer to be installed vertically with the rod-end positioned up. Four holes positioned around the rod have been added to the end-cap to direct water away from the rod and into the new mounting channel. This new design ensures liquid does not migrate into the shell where it will interfere with proper electrical operation and/or cause permanent damage to the device. All LT models are available in standard stroke length options from 50…900mm and feature an M12, 4-pole electrical connector. The LT potentiometers can be installed using traditional mounting brackets or the new c-channel along the length of the shell’s bottom surface.
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