C91 LUX/L - length = 500 C91 LUX/H - length = 400
| U | Sound frequency | Sound level [dB] | Symbol | Order number |
|---|---|---|---|---|
| 12V | High 390 Hz ± 5% | 117 | C91/1NLUX/12V H | TFK-51AT |
| 12V | Low 340 Hz ± 5% | 117 | C91/1NLUX/12V L | TFK-52AT |
| 12V | H+L set | 117 | C91/2LUX/12V | TFK-53BT |
| 24V | High 420 Hz ± 5% | 117 | C91/1NLUX/24V H | TFK-54AT |
| 24V | Low 345 Hz ± 5% | 117 | C91/1NLUX/24V L | TFK-55AT |
| 24V | H+L set | 117 | C91/2LUX/24V | TFK-56BT |