[TriEmbed] Question: On/Off Sensor for Hot Water Heater

[Dwight Morgan]

Hello All:

 

I want to monitor when my hot water heater is on and off using my Arduino
UNO. I have done research on sensors and it looks like the best choice is
the ACS712 Hall Effect Current Sensor. 

 

My water heater has two 4500 Watt elements at 240 Volts. So the calculated
current draw is 18.75 amps since only one element is on at a time.

My question(s): First, is the Hall Effect sensor a good choice and second,
if so, will the 20 amp rated one work okay? 

 

Also, if this is viable, I think I will try to use Cat5 cable to pick up the
signal which will be about 100 feet away. I'm not sure exactly about the
connectors yet.

 

All advice is appreciated. 

 

Thanks!

 

Dwight

 

 

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