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Optoelectronic Level Switch - OLS-C51

Brand: WIKA Alexander Wiegand SE & Co. KG
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The model OLS-C51 optoelectronic level switch is used for monitoring the level of liquids. The optoelectronic sensor consists of an infrared LED and a light receptor. 

The light from the LED is directed at a prism which forms the tip of the sensor. So long as the tip is not immersed in liquid, the light is reflected within the prism to the receiver.
Features
  • Application at medium temperatures up to +135° C
  • Mounting position as required
  • Accuracy ±2 mm
  • Explosion-protected version Ex i
The model OLS-C51 optoelectronic level switch is used for monitoring the level of liquids. The optoelectronic sensor consists of an infrared LED and a light receptor. 

The light from the LED is directed at a prism which forms the tip of the sensor. So long as the tip is not immersed in liquid, the light is reflected within the prism to the receiver.
Features
  • Application at medium temperatures up to +135° C
  • Mounting position as required
  • Accuracy ±2 mm
  • Explosion-protected version Ex i
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Specifications

Brand

Measurement Accuracy

  • ± 2 mm

Minimum Distance from the Glass Tip to An Opposite Surface

  • ≥ 10 mm (≥ 20 mm with Polished Surfaces)

Process Connection

  • G 1/2” Male

Responsiveness

  • Preset for the Detection of Aqueous Media and Oils

Medium Temperature

  • -30° to 135° C

Ambient Temperature

  • -30° to 80° C

Operating Pressure

  • 40 bar (4.0 MPa)

Material of Construction

  • Case: Stainless Steel 1.4305 (Non-wetted Parts)
  • Process Connection: Stainless Steel 1.4571
  • Light Guide: Borosilicate Glass, Fixed with Epoxy Resin

Power Supply

  • 7.5-30 Vdc

Output

  • Fault: Less than 4 mA, > 20 mA
  • 4-20 mA, Protected Against Reverse Polarity
  • “Open”: ≥ 12 to 18 mA
  • “Closed”: ≥ 4 mA to 20 mA

Electrical Connection

  • Diameter: 2 x 0.5 mm²
  • Cable length freely definable
  • PUR cable halogen-free

Output Function

  • NO (Closed in Medium)
  • NC (Open in Medium)

Ingress Protection

  • IP65

Number of Switch Points

  • 1

Certifications & Approvals

  • CE
  • RoHS
  • IEC
  • ATEX
  • EMC
  • IECEx
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Applications

  • Machine tools
  • Hydraulics
  • Plant construction and machine building
  • Water technology
  • For liquids such as oils, water, distilled water, aqueous media
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