timerrelay
nounUK /ˈtaɪmə ˈriːleɪ/
US /ˈtaɪmər ˈriːleɪ/
A timer relay is a switch that turns things on or off after a set amount of time.
The timer relay turns on the garden lights every evening at seven.
RELATED WORDS
OTHER MEANINGS
2. A relay that delays the start of a machine until a set time has passed.
The motor's timer relay keeps it from starting for ten seconds after the button is pressed.
3. A relay that keeps a device running for a set period after it is triggered.
A timer relay keeps the bathroom fan running for five minutes after the light goes off.
4. A programmable relay used to control lights or appliances on a schedule.
He set the timer relay to water the plants twice a day.