How to use RIEGL Laser Instruments within explosion endangered area

Method I:

Electronics unit of the laser instrument placed outside hazardous locations, glass-fiber coupled optical head placed inside the hazardous location.

Since the optical head contains neither electrical components nor an electrical connection to other electrical equipment it is intrinsically explosion proof.

Explosion protection with respect to radiation of laser:
Observance of the regulations of "Richtlinien für die Vermeidung der Gefahren durch explosionsfähige Atmosphäre mit Beispielsammlung (ExRl)" produced by the chemical industries trade association of Germany.

Example: Docking & Driftwarning for supertankers as realised by several OEM-customers.

Laser Instrument placed inside an explosion proctected case to allow its use at hazardous locations:

• Zone 1 (explosive gas atmosphere occasionally)
• Zone 2 (explosive gas atmosphere very occasionally and for a short period only)

Explosion protection with respect to electrical ignition souces:
Type of protection: Flame proof enclosure, increased safety
Specification: EEx de IIC T6 according to EN50014 (1992)
Test Certificate: PTB Nr. Ex-88.B.1067

Explosion protection with respect to radiation of the laser:
Observance of the regulations of "Richtlinien für die Vermeidung der Gefahren durch explosionsfähige Atmosphäre mit Beispielsammlung (ExRl)" produced by the chemical industries trade association of Germany.

Example: LD90-3100HA-EX used for level measurement on a "Gasometer".

Information contained herein is believed to be accurate and reliable. However, no responsibility is assumed by RIEGL for its use. Technical data are subject to change without notice.

RIEGL General Information GI007 (3/99)

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Last updated 05/23/02