 | very simple to use |
| fixed measurement range 70-140 dBA |
| control with slide switch |
| direct display in decimal format for noise dose % value |
| fixed criterion of 90 dBA |
| 3 dB exchange rate for equal energy principal measurements |
| results expressed in noise dose % based on 90 dB for 8 hours or in
Pa2h units |
| suitable for new European Noise at Work regulations released in 1989 |
| powered by 9V battery |
| 1 measurement at a time |
| released in about 1988 |
