Robust lenses for mounting close to hot product where ambient temperatures are subject to extreme variation. Impervious to water and steam and hence well suited for extremely harsh environments.Used in conjunction with flexible armoured optic lead, these lenses provide a high level of optical accuracy by allowing the selection of the ideal lens arrangement for the installation. There are four styles of lenses available.

1. PRECISION SLIT LENS 1⁄2° x 25° FIELD OF VIEW UTILISING LINEARISED OPTIC LEAD.
Incorporating the following features:

Gunsight alignment
Unique built–in air purge/cooling facility
Internal 5° & 10° vertical shuttering option
Slide flange mounting
Ambient rating of 160°C
Ideal for length measurement of hot strip and plate.

2. STAINLESS SLIT LENS 2° x 15° FIELD OF VIEW
Incorporating the following features:

Separate air purged collimator tube option
Ambient rating of 180°C or 400°C
Slit field of view at low cost
Highly suitable where rod & bar bounces about the centre line.

3. STAINLESS TUBULAR LENSES 1°, 2°, 4° OR 7° SPOT FIELD OF VIEW
Incorporating the following features:

Standard 25mm diameter housing for all lenses
Detached air purge facility via mounting nozzle
Ambient rating of 180°C or 400°C
Inexpensive lenses that are straightforward to install and extremely rugged construction. Ideal for product tracking.

4. HIGH TEMPERATURE QUARTZ ROD SHIELDED 1° SPOT FIELD OF VIEW
Purpose built for mounting in exceptionally high ambient site adjacent to furnaces or hot slab. Used in conjunction with 400°C rated optic lead, withstands 1200°C radiant heat. Lens contamination minimised by screw–on nozzle with or without air purge facility.

Parameter Name	Parameter Value
Type	water
Technical applications	for detection
Other characteristics	rugged