2017 NAICS Definition

T = Canadian, Mexican, and United States industries are comparable.

561621 Security Systems Services (except Locksmiths)

This U.S. industry comprises establishments primarily engaged in (1) selling security alarm systems, such as burglar and fire alarms, along with installation, repair, or monitoring services or (2) remote monitoring of electronic security alarm systems.

Cross-References. Establishments primarily engaged in--

• Selling security alarm systems for buildings, without installation, repair, or monitoring services--are classified in Sector 42, Wholesale Trade, or Sector 44-45, Retail Trade; and
• Retailing motor vehicle security systems, with or without installation or repair services--are classified in Industry 441310, Automotive Parts and Accessories Stores.

2007 NAICS		2012 NAICS		2017 NAICS		Corresponding Index Entries
561621		561621		561621		Alarm system monitoring services
561621		561621		561621		Alarm systems sales combined with installation, repair, or monitoring services
561621		561621		561621		Burglar alarm monitoring services
561621		561621		561621		Burglar alarm sales combined with installation, repair, or monitoring services
561621		561621		561621		Fire alarm monitoring services
561621		561621		561621		Fire alarm sales combined with installation, repair, or monitoring services
561621		561621		561621		Security alarm systems sales combined with installation, repair, or monitoring services
561621		561621		561621		Security system monitoring services