P&F has the best background suppression sensing on the market. The ML4.2 and ML6 series now include new models to complement these sensors with even sharper detection, zero deadband sensing, and other powerful benefits.

Read More Below for a glance at the newest sensors in the ML4.2 and ML6 photoelectric sensor families.

Sharpest, Most Precise Sensing

What: ML4.2-8-H-21-22-IR/40b/95/110

Why: These models offer the sharpest sensing distance cut-off and smallest switching hysteresis on the market for background suppression sensors. The first model, also available with a visible red emitter, senses black and white color extremes within an extremely tight sensing window. A black test object is sensed up to 20 mm from the sensor, a white test object is sensed up to 21 mm, and no targets are detected at or beyond 22 mm. This compares to the standard version ML4.2-8-H-20 which enables background suppression at 25 mm from the sensor.

Where: They should be considered when the object to be detected is just 1-3 mm in front of the background, such as detecting a piece of cardstock on a belt or if paper is angled or straight in a feeder.

P&F Retroreflective Sensing with No Sensing Deadband

WhatML4.2-54-F/40b/95/110, ML4.2-54-F/95/110/126b, ML6-54-F/25/115/136, and ML6-54-F/25/95/136

Why: These sensors are used with a corner-cube reflector and are polarized so shiny objects will not be erroneously seen as the reflector. They also have no sensing deadband due to an innovative single optical axis design.

Where: Used for applications that require more signal strength than background suppression sensors, they sense at either very close or long sensing distances. They can be used when rigid reflectors or even reflective tape must be detected up to the sensor face, as a standard retroreflective would typically not see reflective tape unless it is two to four inches from the sensor. They offer precise and repeatable leading edge detection of objects such as solar cell wafers and packaged tubes and cartons.

P&F Thru-beam Sensing

What: M4.2-8000-RT/76a/95 (emitter) and MV4.2-8000-RT/40b/95/110 (receiver)

Why: The thru-beam sensor is used for maximum signal strength when retroreflective and background suppression models do not have enough optical power. It also features an optical alignment aid to indicate marginal signal strength, a status LED to indicate if small objects are not seen at high speeds, and quadruple the speed of its predecessor series.

Where: This series is for use over the longest sensing distances-up to at least 8 meters-or in dirtier environments.

Benefits of ML6 and ML4.2 Series:

  • Built-in crosstalk immunity (eliminates concerns about side-by-side mounting)
  • Tamperproof: no external adjustments
  • 4-in-1 output reduces inventory and wiring hassles
  • Metal reinforced mounting holes
  • Improved ambient light immunity (even for high-frequency, energy-saving lights)
  • Diagnostic LEDs in front and back of housingAdditional
Benefits of ML4.2 Series:
  • Antistatic, scratch-resistant glass lens well-suited for printing, paper environments

For further information on new additions to the ML4.2 and ML6 series, as announced in the first part, please see:

ML4.2 new additions, Part 1

ML6 new additions, Part 1