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E2S Warning Signals is the world's leading independent manufacturer of high performance audible and visual signals

17 February 2015

E2S Warning Signals, established some 25 years ago, is the world's leading independent manufacturer of high performance audible and visual signals for commercial, industrial, marine and hazardous locations producing over 250,000 units per year across more than 190 different products. 

Combining the latest technology with industrial design, engineering and manufacturing expertise E2S has created the most extensive range of life saving signals that satisfy the toughest global standards.

The head office and manufacturing operations are located in London, UK. A dedicated distribution hub and sales operation is based in Houston, Texas principally serving North and South American customers as well as supporting projects globally. An international network of distribution partners and system integrators ensure worldwide product availability and local technical support.

Global approvals ensure that E2S products can be specified for use in projects around the world. Approvals held on various products include ATEX, IECEx, cULs, FM, TR CU, VdS, INMETRO, MED and CE.

To help specifiers choose the most appropriate warning indicator for the application, a wealth of reference information is freely available at

Product Overviews cover Hazardous area signalling , Fire & industrial signalling and Wide area signalling.

Product Advice covers interface selection of intrinsically safe sounders and beacons, guide to audible signals, guide to visual signals, guide to alarm stage selection and gives the opportunity to listen to and download E2S alarm horn sounder tones.

General references and guidelines cover IP (Ingress Protection) ratings, dB ratings, PFEER/UKOOA alarm tone guidelines and sound basics: measuring power in dB.

Guides for hazardous areas cover

·  ATEX, IECEx Zones and North American Classes and Divisions

·  Gas & dust groups and temperature classifications

·  Apparatus groups and common flammable gases, vapours and dust types

·  Protection concepts ATEX and IECEx

·  Protection concepts North America and Canada

·  IP ratings and NEMA enclosure types

·  Cable gland selection

·  Typical equipment marking and references

Industry related documents include

·  Wide area alarms that suit COMAH sites

·  Project case studies

·  Signalling in hazardous areas.

Other documents focus on the features and benefits of specific E2S product families.

·  SIL 2 certified audible and visual warning signals

·  E2x non-sparking alarm horns, sirens and strobes

·  BEx explosion & flameproof horns, strobes and call points

·  GNEx explosion proof horns and ATEX call points

·  IS intrinsically safe alarm horns and strobes

·  M range heavy duty and marine alarm horns and strobes

·  Mass notification and disaster warning sirens 

Hazardous areas applications

Hazardous areas are to be found in a very wide range of manufacturing industries, far beyond the obvious petrochemical plants. Food, pharmaceutical and cosmetic manufacture all involve processing potentially explosive substances, while the problems of explosions in grain silos and sugar processing plants are very well documented. Hazardous areas are defined as areas where concentrations of flammable gases, vapours or dusts may occur, either constantly (Zones 0 and 20), under normal operating conditions (Zones 1 and 21) or unusually (Zones 2 and 22). Additional conditions relating to the temperature classification and the auto-ignition temperatures of the type of gas or dust to be found.

Guides on the web site covering hazardous area provide much general information

The complete range of E2S products can be seen here

Fire and industrial signalling

In the great majority of automatic fire alarm sounders or fire alarm systems, the end result of the detection of a fire is the initiation of audible and visual warning devices that alert the occupants to the danger so that they can evacuate the premises. EN54-23 is the European product standard for visible warning devices used in fire systems; the L101 beacon is approved for use in Wall mount, Ceiling mount and Open classes. Combination strobe/sounder units are also approved.

Given the complexity and variation of different types of buildings and structures in which fire alarm sounders are installed, and the further variations to be found in the homogeneity or otherwise of the occupants, it is clear that, for maximum effectiveness, many different types of fire alarm sounders will be required. For example, at one end of the spectrum may be an offshore oil rig, which is manned by highly trained workers who operate under strict safety procedures at all times; at the other end is a large retail development crowded with shoppers who are unfamiliar with the general layout of the building or the position of the nearest emergency exit. 

Clearly, the technical requirements for a fire alarm system and the nature of the warning signals themselves will vary greatly. The key consideration for the system designer is how to produce clear, unambiguous fire alarm warning devices throughout the protected areas in the event of an emergency. For an overview of the range, visit signals for fire and industrial applications.

Full datasheets, approvals, declaration of conformity, PDF and DWG 2D drawings, IGS and STEP 3D drawings and high and low res product images for all products are available online. To discuss specific project requirements call + 44 20 8743 8880 or mail The web site also has a full list of distributors and agents around the world.

About E2S

E2S is the world’s leading independent signalling manufacturer. Based in West London, England the company designs and manufactures a comprehensive range of signalling products for industrial, marine and hazardous area environments. E2S products are available globally via their distribution network, details of distributors are available on the company’s website. Additionally, E2S has a dedicated distribution hub in Houston, Texas for local product distribution and technical support.

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