Herberts - Model USL03/USL03-LED -Sight Glass Luminaires

Operating conditions

• Independent of the internal pressure/vacuum in the vessel.
  On no account should a sight glass luminaire be
  used on its own to close a vessel port or as a
  replacement for the cover flange or instead of
  the complete sight glass flange assembly.
• The LED version should not be used in ambient
  temperatures  of over 40°C.

Protection

• dust- and waterjet-proof:
  IP 65 acc. to EN 60 529 / DIN VDE 0470, Part 1

Transformers

• Transformers for 24 V secondary voltage can
  be supplied on request.

Materials

• Luminaire housing: stainless steel 1.4301;
  head of luminaire: stainless steel 1.4552
• Mounting parts (hinged bracket or flanged adapter):
  stainless steel 1.4301
• Power cable: 3 m (3 x 0.75 mm²)
• Weight: 0.7 kg

Advantages

• Compact design, powerful light output:
• Glare-free illumination; suitable for circular sight glass fittings to
  DIN 28120/DIN 28121 or similar and for screw-type sight glass
  fittings in compliance with DIN 11851.

Technical data

• The Sight Glass luminaire USL03 fits the following sizes:
  a) Circular sight glass fitting acc. to DIN 28120: from DN 25
  b) Circular sight glass fitting acc. to DIN 28121: from DN 40
  c) Visual flow indicators: from DN 25
  d) Screw-type sight glass fittings in compliance with DIN 11851: from DN 65

Operating Voltage
without integrated pushbutton:

• 24 V AC/DC halogen lamp 20 W, 2-pin socket G4
• 12 V/24 V AC/DC LED 2 W, 2-pin socket GU4

with integrated pushbutton:

• 24 V AC/DC halogen lamp 50 W, 2-pin socket GY6.35
• (12 V available as an alternative option)

Momentary pushbutton

• 50-watt luminaires should only be operated by pushbutton
  (not in continuous mode).