The microwave energy radiated by a radar antenna is harmful to humans, especially to the eyes. NEVER look directly into an open waveguide or into the path of radiation from an enclosed antenna. Radar and other radio frequency radiation can upset cardiac pacemakers. If someone with a cardiac pacemaker suspects abnormal operation, immediately turn off the radar equipment and move the person away from the antenna. Turn off the radar whenever it is necessary to work on the antenna unit or other equipment in the beam of the radar.
Note! Most countries accept that RF power density levels below 100 W/m2 cause no significant RF hazard.
| Vertical beam | Minimum safe distance | Minimum safe distance |
Scanner | angle of | (100 Watts per m² | (10 Watts per m² |
Model | scanner | average power density) | average power density) |
| (degrees) | Note 1 | Note 2 |
2 kW | 30 | 1.6 ft (0.5 m) | 4.6 ft (1.4 m) |
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4 kW | 25 | 3 ft (0.9 m) | 9.3 ft (2.8 m) |
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6 kW | 20 | 3.6 ft (1.1 m) | 11.5 ft (3.5 m) |
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10 kW | 20 | 9.5 ft (2.9 m) | 30 ft (9.0 m) |
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25 kW | 20 | 18 ft (5.5 m) | 57 ft (17.4 m) |
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NOTES: Limits apply to exposure within the vertical beam angle.
Note 1: Peak occupational exposure limit pursuant to IEC 60936 Clause 3.27 and IEC 62252 Clause 4.32
Note 2: General public exposure limit pursuant to IEC 60936 Clause 3.27 and IEC 62252 Clause 4.32
