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The O6 Wetline range of photoelectric sensors from IFM Electronic has been designed for applications characterised by wet production areas such those found in food environments.

The compact food-grade photocells are manufactured from stainless steel. They are IP69K rated and are claimed to offer excellent optical performance.

The O6H variant is a diffuse reflection sensor with background suppression designed to detect the direct reflection from an object without sensing what is behind it. It has a sensing distance of up to 200m regardless of the colour of the target object. Black objects (with six per cent remission) do not pose a problem.

The O6 Wetline range also includes standard (energetic) diffuse reflection types, with a range up to 500mm; retro-reflective (reflex) versions with 5m range; and through-beam (transmitter/receiver) with 10m range.

Key features and benefits

  • The O6H sensor has built-in compensation of the detection in the case of steam and mist — ideal for wet environments where fine water droplets can cause unwanted reflection.
  • Accurate sensing is aided by maintaining a tight beam (light spot diameter of 8mm even at the 200m range).
  • The sensor’s optics are capable of ignoring shiny surfaces behind the target and also below the light beam path.
  • Issues with unwanted signals caused by stainless steel target surfaces not being precisely perpendicular have been eliminated.
  • The O6 sensor housing has been autoclave tested and repeatedly submerged in boiling water and then ice water, proving its resistance to steam and temperature shock.
  • All significant IP tests have been passed: IP65 for cold water jets from one direction; IP67 for 0.1 bar immersion for 30 minutes; IP68 for cold water immersion at 0.1 bar for seven days; and IP69K for hot water jets (80°C) at 80–100 bar from four directions over two minutes.
  • The O6 range will operate in temperatures of up to 80°C (from -25°C).
  • All variants are available with either a 2m fixed cable or a short cable fitted with an M12 connector.
  • All O6 types can switch light-on or dark-on (equating to normally open or normally closed) and both PNP and NPN switching variants are on offer.
  • Accessories include stainless steel mounting brackets, the EVT range of mating M12 connectors and chemically resistant reflectors.

ifm electronic specialises in the application of advanced electronic technology to produce innovative and effective solutions for industrial control applications.

Products include flow sensors; pressure transmitters and switches; temperature switches and transmitters; capacitive, inductive and photoelectric proximity sensors; and a full range of AS-i I/O modules and masters.

Details of ifm electronic's products and services may be obtained from our website, which has been carefully designed to provide the fastest, easiest way of finding exactly the right sensor for almost any application. Better still, once the correct sensor has been identified, the site also allows the data sheet to be downloaded almost instantly and, for most sensors, it even provides an interactive animated guide to achieving optimum adjustment.

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