Table 2. Action levels for thermal effects in Directive 2013/35/EU.
| Frequency | AL electric field strength (V/m) |
AL magnetic flux density (μT) |
AL power density (W/m2) |
| 100 kHz ≤ f < 1 MHz | 6.1×102 | 2.0×106 /f | – |
| 1 ≤ f < 10 MHz | 6.1×102 /f | 2.0×106 /f | – |
| 10 ≤ f < 400 MHz | 61 | 0.2 | – |
| 400 MHz ≤ f < 2 GHz | 3×10–3 √f | 1.0×10–5 √f | – |
| 2 ≤ f < 6 GHz | 1.4×102 | 4.5×10–1 | – |
| 6 ≤ f < 300 GHz | 1.4×102 | 4.5×10–1 | 50 |
Abbreviations: AL, action level.
Note 1: f is the frequency in hertz (Hz). Note 2: Squared AL for electric field strength or magnetic flux density are to be averaged over a six-minute period. For RF pulses, the peak power density averaged over the pulse width shall not exceed 1,000 times the respective AL value. For multi-frequency fields, the analysis shall be based on summation, as explained in the practical guides referred to in Article 14 of the EU Directive. Note 3: AL for electric field strength or magnetic flux density represent maximum calculated or measured values at the workers’ body position. In specific non-uniform conditions, criteria for the spatial averaging of measured fields based on established dosimetry will be laid down in the practical guides referred to in Article 14 of the EU Directive. In the case of a very localised source within a distance of a few centimetres from the body, compliance with ELVs shall be determined dosimetrically, case by case. Note 4: Power density shall be averaged over any 20 cm2 of exposed area. Spatial maximum power densities averaged over 1 cm2 should not exceed 20 times the value of 50 W/m2. Power densities from 6 to 10 GHz are to be averaged over any six-minute period. Above 10 GHz, the power density shall be averaged over any 68/f1,05 -minute period (where f is the frequency in GHz).