SD20 Series Optical Level Switch

Part Number: SD20 SERIES Brand: FineTek
Price
$163.00 CAD
Stock
25+ In Stock

The optical liquid level switch uses the principle of total reflection in a prism. 

Reflection or penetration, is the basis of the level alarm output. 

When the sensor is surrounded by air, the angle of incidence is greater than the critical angle and thus total reflection occurs. 

Totally reflected light will be transmitted to the receiver. 

Conversely, when the sensor is surrounded by liquid, due to the refractive index of the liquid and the sensor tip material, almost all light will penetrate the front of the sensor. 

Using this principle, the optical liquid level switch design is based on light. 

The receiver can detect and determine a light reflected or penetrated state, and determines the circuit output.
Features
  • Simple, compact, and robust
  • No moving parts
  • Built-in, solid-state electronics
  • Easily removed, cleaned, and reinstalled
  • NPN, PNP open collector output to energize relay or PLC
  • Housing material of PC, PES, SUS304, SUS316 for applicable in water, oil, liquid solution, liquor, alcohol, organic solvent etc.
  • PC, PES for acidity and alkaline
  • Over-current and reverse polarity protected
  • LED status indication

Specifications

Brand

Ambient Temperature Range

  • -10° to 80° C (-15° to 175° F)

Approvals & Certifications

  • CE
  • UL (SA44153)

BSP Connection

  • G 1/2” Male

Cable Length

  • 6.56 feet (2 metres)

Cable Material

  • PVC

Consumption

  • Current Consumption: < 15 mA

Current

  • Load Current: ≤ 100 mA

Electrical Connectors

  • Cable, 24 AWG
  • M12 x 1

Electrical Contacts

  • Normally Closed or Normally Open

Electrical Protection

  • Reverse Polarity
  • Short Circuit Protection

Enclosure, Body Material

  • 304 Stainless Steel
  • 316 Stainless Steel
  • Polycarbonate (PC)
  • Polyethersulfone (PES)

Environmental Protection

  • IP67

Indication

  • Red LED

Materials of Construction

  • Tip Material: Polycarbonate (PC)
  • Tip Material: Polyethersulfone (PES)

Media

  • Liquids

Metric Connection

  • M12 x 1 Male

NPT Connection

  • 3/8” NPT Male

Operating Temperature

  • -10° to 125° C (14° to 257° F)

Pressure Range

  • psi: 0 to 145 (kPa: 0 to 1,000, bar: 0 to 10) for PC/PES
  • psi: 0 to 580 (kPa: 0 to 4,000, bar: 0 to 40) for 304/316 Stainless Steel

PT/PF/PS (JIS) Connection

  • 3/8” PF Male
  • 3/8” PT Male

Sensor, Probe Style

  • Optic

Supply Voltage

  • 10-28 Vdc

Switch Type

  • Output Mode: NPN/PNP

Torque

  • 43.4 In/Lbs (50 kgf-Cm) for PC/PES
  • 86.8 In/Lbs (100 kgf-Cm) for 304/316 Stainless Steel

  • Air Conditioning Systems
  • Food & Beverage Systems
  • Heavy Duty Automotive
  • Industrial Compressors
  • Pharmaceutical Systems
  • Processing & Packaging Equipment

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