FM Approvals has been made aware of a potential safety risk pertaining to the LON version of the LS2000 Open Path Combustible Gas Detector, Models: LS2000Sx14xxxxR and LS2000Sx14xxxxRM. There have been reported instances of these detectors being non-responsive.

Company Identity: Detector Electronics Corporation

Address: 6901 West 110th Street, Minneapolis, MN 55438 USA

Contact Information: Phone: +1 800-765-3473 extension 3 or +1 952-941-5665 extension 3

Email: techsupport.det-tronics@carrier.com

Product Identity: LS2000Sx14xxxxR and LS2000Sx14xxxxRM

Description: Open Path Combustible Gas Detector

Make/Model: LS2000

Nameplate Data: Explosionproof for installation in Class I, Division 1, Groups B, C, D T4, Ta = -50°C to +75°C; dust-ignition proof Class II/III, Division 1, Groups E, F, G T4, Ta = -50°C to +75°C hazardous (classified) indoor/outdoor locations ANSI/ISA-12.13.04 and FM 6325.

FM Approval Status: FM Approved

Hazard Involved: The products in question have a potential safety risk pertaining to the LON version of the LS2000 Open Path Combustible Gas Detectors. Under certain conditions the equipment can enter a non-responsive state while appearing to be in normal condition. The Specific model serial numbers and label serial numbers are listed in the table below:

If you suspect you are in possession of one of the referenced LS2000 Open Path Combustible Gas Detectors bearing the FM Approvals certification mark, please follow the instructions in the attached bulletin.