Here is an ideal project for students in areas of low rainfall, or away from town water supplies. This easily-constructed indicator shows three levels of water in a vessel or pool using red, amber and green LEDs. The FK902 demonstrates the principle of water conductivity and shows how, by using a High and Low probes and simple logic, 3 water levels may be displayed.
Shipping Time:
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Delivery time Almost of Asia Countries : 7-12 Working days*
Delivery time to USA : Approx 12-20 Working days*
Most of Europe Countries : Approx 21-28 Working days* *
The delivery time will depend on the processing at the customs in each country,
** Policy of Satisfaction on refund money: in case the item is not the same as product s description or damage during shipment, the buyer has to send the item back within 7 days after received and buyer respond on the shipping cost of return & The Item must be return in the same condition as it was when it sent to you.
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