Sight glass light fitting type KEL | Noris

Indicator Glass Luminaire Noris KEL

The Noris KEL is a luminaire designed for tank sight glasses and sight flow indicators. It enables combined illumination and observation through a single glass port, suitable for both safe and hazardous (Ex) areas. Technical documentation classifies it as an EX-light fitting; specific Ex/ATEX certification must be verified per part number and manufacturer certificate.

Mounting Compatibility

The KEL can be installed on:

• circular sight glasses per DIN 28120
• circular sight glasses per DIN 28121
• screwed sight glasses per DIN 11851
• Noris sight flow indicators, Bauform 880–887

Mounting is via clamping screws supplied with the unit. Required threads are specified by Noris; mechanical compatibility must be checked against the sight glass type.

Electrical Data

• Power supply: AC or DC, depending on version
• Voltage: 12–240 V
• Power: 5 / 10 / 20 / 50 VA
• Dimensions: refer to datasheet for each variant

The luminaire operates independently of vessel pressure, as it is externally mounted and does not contact the process medium. Prolonged operation may result in body heating; thermal effects should be considered in continuous use.

Typical Applications

• Process tanks requiring internal illumination
• Level, foam, color, or deposit inspection
• Flow lines with visual confirmation of liquid or gas presence
• Installations without a secondary port for a dedicated luminaire

Selection Criteria

Specification should include sight glass type, voltage, AC/DC, power rating, duty cycle, installation area, and Ex certification requirements. For Ex zones, cross-check with zone classification, equipment category, and luminaire certificates.

FAQ

Does it affect the operating pressure of the sight glass?
No. Pressure rating is determined by the sight glass, not the luminaire.

Is it a measuring instrument?
No. It only supports visual inspection.

Is an actuator required?
No. It is an electrical lighting accessory without process actuation mechanism.