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  • PX Series Sensors
Apr 2008
KEYENCE Corp. of AmericaRequest Info
WOODCLIFF Lake, N.J., April 9, 2008 -- Keyence Corp. of America said its PX series of photoelectric sensors represents the ultimate in rugged, high-performance sensors, because the sensor heads carry an IP-69K environmental rating that allows them to be subjected to high-pressure (1400 psi) wash-down applications, even at high temperatures (176 °F).

Stainless steel casing prevents damage due to vibration and shock from tools or colliding with other objects. The sensor heads are backfilled with epoxy under vacuum conditions, filling every void in the sensor head cavity to prevent all-liquid substances and material from damaging the internal electronics. Tough, scratch-resistant lenses help protect the sensor when subjected to harsh environments, the company said.

KeyencePX.jpgThe PX-10 amplifier is IP-67 rated can get splashed or rinsed without damaging the unit. The dual output feature allows the user to easily see when the sensor activates (output 1) and when the low-light alarm turns on (output 2). The dynamic stability control function continuously and automatically adjusts the set point according to the environmental conditions, allowing the line to be run longer between cleanings.

The PX's high-power "mega" mode can blast through dust and other types of dirty environments for extended periods of time even with significant buildup on the lens. The result is stable detection which eliminates downtime and the need to frequently purchase replacement units.

The low-light alarm tells the user when the light level becomes too low for stable detection. Customized save settings allow the user to revert back to their own settings in case something is accidentally changed while troubleshooting. The power-saving function automatically turns off the digital display which can reduce current consumption during operation.

Seven water- and oil-resistant types of sensor heads are available to meet the needs of high-pressure wash-down applications. Ultrahigh-intensity LEDs provide power by combining infrared or four-element red LEDs with optical-quality glass lenses. The PX-H71 through beam (20 m) and PX-H61 reflective (2 m) produce a visible red light which allows easy alignment and takes the hassle out of setup, Keyence said.

The PX-H72 produces an infrared beam that can handle detecting four times the detecting distances (40 m) of conventional sensors and is unaffected by oil or dirt. For even better protection of these sensor heads, stainless steel guarded units are available. The PX series also offers the space saving, hex-shaped PX-H71TZ (20 m) that has a 90° bend in the cable to help prevent entanglements.

If light intensity fluctuates due to dust or misalignment, the user can periodically adjust the set point with a touch of a button or a pulse from an external input. The zero-shift function allows the user to adjust the displayed value to better suit their needs. When using a reflective type, one can easily set the received background to 0. This is useful when there is little difference in light intensity between the background and a target.

For more information, visit:; e-mail:

Keyence Corporation of America
50 Tice Blvd.
Woodcliff Lake, NJ 07677
Phone: (201) 930-0100
Fax: (201) 930-0099


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The technology of generating and harnessing light and other forms of radiant energy whose quantum unit is the photon. The science includes light emission, transmission, deflection, amplification and detection by optical components and instruments, lasers and other light sources, fiber optics, electro-optical instrumentation, related hardware and electronics, and sophisticated systems. The range of applications of photonics extends from energy generation to detection to communications and...
1. A generic term for detector. 2. A complete optical/mechanical/electronic system that contains some form of radiation detector.
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