Beware Of Electro-Magnetic Interference On Heart Pacemaker – SABS safety sign (WW27)

The Beware Of Electro-Magnetic Interference On Heart Pacemaker safety sign (WW27) is used to warn of electromagnetic interference risk for pacemakers in a workplace or public environment. Hazard warning signs alert people to specific dangers so they can adjust behaviour before exposure.

Purpose and function

This sign supports immediate hazard recognition so access is controlled for susceptible persons. It is most effective when placed before the hazard is reached, allowing time to slow down, change route, isolate energy sources, or apply PPE and procedures.

Typical applications

• Controlled access zones with radiation or electromagnetic exposure risk
• Specialised facilities where warning signage supports access control
• Areas requiring distance rules and restricted entry for susceptible persons
• Locations where equipment emits non-ionising radiation or strong EM fields

Commonly used with

• No Entry SABS safety sign
• No Entry For Vehicles SABS safety sign
• Telephone SABS safety sign
• Emergency Telephone SABS safety sign

Selection and placement guidance

Place hazard warning signs so they are visible before the hazard is reached, giving people time to respond. Install at decision points, access routes, and equipment approach paths, keep the sign within the normal line of sight, and avoid obstruction by doors, racking, or equipment. Where the hazard is persistent or the route is long, repeat the sign to maintain awareness.

For broader guidance on safety sign categories, colours, shapes, and correct selection, refer to our Safety Signs Explained guide.

Visibility and material options

This sign is available in standard sizes and materials suited to typical indoor and outdoor use. Select a size that matches viewing distance and approach speed, and choose a substrate appropriate to the environment. Where visibility must be retained during power failure or low-light conditions, consider a photoluminescent variant where available.

For applications requiring extended emergency wayfinding or enhanced visibility in low-light conditions, view the full range of photoluminescent safety signs.

Compliance

In South Africa, safety sign designs follow South African National Standards (SANS), including SANS 1186-1:2022, which governs the design, colours, shapes, symbols, and application of safety signs and safety markings. These standards are administered through the South African Bureau of Standards (SABS) to promote consistent recognition across workplaces and public environments.

SANS 1186-1:2022 aligns closely with internationally recognised standards, including ISO 7010 and ISO 3864-3, ensuring familiarity and clear understanding across different industries and regions.