Optimum 24 Hour Timer - The New and Improved Version of the Grasslin Timer

Optimum 24 Hour Timer - The New and Improved Version of the Grasslin Timer

SKU: 87410
Optimum 24 Hour Timer - The New and Improved Version of the Grasslin Timer

The New Update to the Grasslin Timer

Grasslin Timers have been a staple in the hydroponics world for a good reason: not only do they keep time accurately, they're practically indestructible and super-reliable. The Optimum Timer is the Grasslin's replacement - it delivers the same bulletproof build-quality and unfaltering reliability as the original Grasslin, but with improved components and design tweaks. Very highly recommended.

  • Optimum Timers - the new replacement for Grasslins
  • Features numerous technical design improvements
  • Manufactured with even better components than Grasslin Timers
  • Features on / off times over a 24hr period that are easily settable in 15-minute increments
  • Represents superb value for money
  • Ideal for controlling your pumps and lighting equipment (with a contactor-switch)
  • Includes a constantly on / timed / off override switch


1 x Optimum 24Hr Analogue Segmental Timer

How the Optimum Timer Works:

The Optimum Timer will switch mains power to almost any electrical device with resistive loads of up to 13 amps and inductive loads of up to 8 amps. The required on-times are set by the position of tabs around the timer. The correct time is set on the timer by gently turning the time-face so that the arrow points to the correct time. When the timer is plugged in, the clock will keep the time and activates a heavy-duty relay to switch electrical power to the socket on the front face according to the programme you have set up. An override switch on the front of the timer allows the user to have the output follow the set programme or to be put into 'constantly-on' or 'constantly-off' mode.

How to Use the Optimum Timer:

The Optimum timer can be used to switch on an electrical device according to a user-set programme of (minimum) 15-minute intervals. The timer will repeat the same programme daily until the programme is changed. Set the required “on" times on the timer by moving the appropriate tabs on the timer face from the outside (off-position) to the inside (on-position). Rotate the timer face clockwise until the current correct time is lined up with the time-indication arrow. Plug the Optimum Timer into a mains outlet and plug the device to be switched into the socket on the front. Set the override switch to the middle (timed-selection) position to switch on your device according to the set programme. To override the timer programme, move the override switch to the on '1' position or the off '0' position.

Although Optimum Timers are rugged and dependable, they will still have a severely-reduced lifespan if they are used to switch lighting ballasts on and off directly. This is due to the high surge currents drawn by such lighting ballasts at switch-on. For the switching of lighting ballasts we very strongly recommend the use of a lighting contactor-switch.