Power detector (electricity)

Configuration
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I have a capilar thermostatic switch which turns on Grundfos Alpha2 circulating pump in heating circuit. I need to get info if this pump has power. Maybe it will be better to buy flow meter and measure water flow…

A word of warning - even if the pump is powered, it might be stalled, displaying two dashes on the LCD. I recently experienced this situation when the room temperature was decreasing because of the stalled pump.

Better use a flow meter or optical sensor attached to the LCD. Grundfos has a product called “ALPHA Reader” but I think it works with ALPHA3 only.

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i recommend this approach

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You might be better off using a Sonoff POW

https://www.itead.cc/sonoff-pow-r2.html

Then flash with Tasmota, and off you go.

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Is it possible for a Sonoff device to report if a current is detected/isn’t detected and how can that be done in HA?

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Hi stevemann,
can you share scheme and coding how you’ve done it using nodemcu? I would like to identify current for safety critical consumers such as oven, heating table etc for alarming if it is ON without human attendance in the kitchen.

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I’ve not gone any further with this idea. Instead, I was inspired by a video by Ralph Bacon.

I made some PCB’s but haven’t gotten around to building one.

Schematic:

CurrentSensor
CurrentSensor3300×2550 322 KB

A simple binary sensor would give a “on” or “off” indication.

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