These high intensive units allow an optimal visual control through only one sightglass assembly.

APPLICATION:
Series HL: On VETROLUX or similar sightglasses to the DIN 28120 / 28121 standards.
Series HLM and HLMR: On VETROLUX screwed sightglass assemblies similar to DIN 11851.

NOMINAL SIZES:
Series HL for DIN 28120, DN 50 to DN 200. (80 to 225 mm free view), for DIN 28121, DN 80 to DN 200 (80 to 150 mm free view).
Series HLM and HLMR for DIN 11851, DN 65 to DN 125

MATERIALS:
Series HL:Corrosion resistant aluminium casting, normally supplied unpainted.
Series HLM: Cast aluminium, painted colour RAL 9001. (Standard).
Series HLMR: Fabricated entirely from stainless steel.

ELECTRICAL DATA:
Supply: AC or DC
Terminal voltage: 24 V ( 12 V possible with 20 or 50 W)
Nominal rating: 20 / 50 / 100 W (dependent on size)
Standard supply includes push-button for momentary illumination.

PROTECTION DEGREE:
IP 65 when correctly mounted

OPTIONS:
- "ON-OFF" switch instead of push-button
Series HL:
- Painted with Acryl colour
- Built-in timer "V" (HL 150 / HL 200)
Series HLM:
- Painted with colour different from RAL 9001
- Housing nickeled

COMPLEMENTARY PRODUCTS:
- External timers and remote transformers in different versions are available to cover the whole range
- Sightglasses to DIN 28120, DIN 28121, DIN 11851
- Wipers of the series W / WD / WDT from DN 80 on (DIN 28120) and from DN 65 on (DIN 11851)
- Wipers of the series WS from DN 100 on (for DIN 28120 only)
- Spraying devices of the series SV / SVS (for DIN 28120 only)