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.
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information on electricity and safety.