| Subject | English | Danish |
| nat.sc., agric. | acoustic frost warning device | akustisk frostadvarselssignal |
| transp. | advance warning device | varseling |
| transp. | advance warning device | foranmeldelse |
| transp. | anti-lock warning device | advarselsanordning for blokeringsfri bremsning |
| immigr., tech. | arm used as a warning device | signalvåben |
| transp. | audible warning device | lydsignalapparat |
| transp., polit. | aural warning device | lydsignalapparat |
| commun., transp. | distant warning device | afstandsmeldeapparat |
| transp. | electro-pneumatic warning device | lydsignalapparat,der virker ved elektrisk kompressor |
| commun., transp. | feed warning device | fødevandsalarmapparat |
| transp., polit., industr. | hazard warning device | havariblinklys |
| transp., polit., industr. | hazard warning device | havariblink |
| commun., transp. | headway warning device | afstandsadvarselsanordning |
| life.sc., agric. | optical frost warning device | optisk frostalarmsapparat |
| transp. | pneumatic warning device | lydsignalapparat,der virker ved trykluft |
| transp. | pre-warning device | varseling |
| transp. | pre-warning device | foranmeldelse |
| transp., avia. | stall warning device | stalladvarselssender |
| commun., transp. | supply warning device | fødevandsalarmapparat |
| IT | warning device | alarmeringsanordning |
| el. | warning device | advarselsanordning |
| transp. | warning device adapter | beslag for montering af lydsignalapparat |
| transp. | warning device receiving direct current | lydsignalapparat til jævnstrøm |
| transp. | warning device supplied with an alternating current | lydsignalapparat,der er tilsluttet vekselstrøm |
| transp., tech. | wheel-skid warning device | hjulspins-indikator |