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Consider the following factors when choosing a timer:

-  The on/off switching regime: For example, in a “pulsed” NFT system, the nutrient pump may need to deliver 10-20 feeds per hour. Run-to-waste systems however, typically require only 1-6 feeds per day, each of around 1-2 minutes duration. Refer to our Feed Frequency & Volume Guide for advice on this point.

-  The number of devices being switched and the total start-up current. Note, unless relay switching is used, high current devices such as lights will require a timer that is capable of handling higher current loads.

-  For safety ensure the power cord is earthed or grounded.

-  Durable casing that resists corrosion and ingress of moisture.

-  Easy to program.

Click here for information on electricity and safety.

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Related topics

"System components":

Nutrient reservoirs | Growing containers (trays / channels / pots) |

Feed circuits (plumbing) | Feed outlets | Blockages)

Nutrient pumps | Timers | Media (substrates)