Following the success of IFM Electronic's innovative T-slot cylinder sensor, the company has introduced the MK53 series of short C-slot cylinder sensors that are real alternatives to the reed switch. The C-slot is common in short-stroke cylinders and grippers, consequently this new unit is only 15 mm in length allowing it to fit the shortest cylinders.
Fitting sensors to C-slots in pneumatic cylinders can be difficult when access is limited. Being small, cylinder sensors are difficult to seal against wet environments, and while the sensor sits flush in the cylinder, the cable can snag and break the switch. IFM Electronic has addressed these problems and more with their new MK53 series solid-state cylinder sensors.
The snap-fit mechanism allows the user to fit the switch with only one hand. It can be easily inserted from above into the C-slot where it clicks home. Even in a vertical slot it stays put while reaching for a screwdriver to tighten it, and no special Allen key is required either.
Most cylinder sensors are fixed at the end furthest from the cable, so snagging the cable lifts the switch out of the slot. Not so with the IFM unit. Cleverly, IFM has integrated the fixing at the cable end, and moulded the cable into the housing, so the forces applied to the cable can be orders of magnitude greater than anything on the market at present. Moulding the cable in this way means a seal of IP67 or better.
The vibration and shock resistant solid state cylinder sensors are supplied as three-wire PNP or NPN, with a 2-metre cable or an in-line connector. A long operational life is assured as non-contact sensors virtually work without wear and tear, achieving a longer life than Reed switches.
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