NOYITO 0-5A AC Current Detection Sensor Module Switch Output (DC 5V, Green)

I use this to monitor when and for how long my sump pump runs. It was simple to hook up and mount. It wasn't necessary for me to set the sensitivity because the pump draws plenty of current and isn't critical for the operation. I wired the normally open contacts to a Raspberry pi and use that to record the times the pump runs and it tells me when, how often and for how long the pump runs. If it runs more than 25 seconds, it gives me an alarm and that time is adjustable in the Pi.

The good:(1) easy to adjust set point,(2) seems to have very little change in set point value over temperatureThe "could be better":(1)There is no indication that the relay is energized or not, just that there is power(2) There is no hysteresis in the device - the relay chatters like crazy. There should be some (ideally adjustable) difference between when the relay is set (ON) and when it is reset (OFF)For my present application it isn't critical as the setpoint is sufficiently below the normal operating current, and there's no way for it to operate near the setpoint, but I have other applications where that isn't true.

I used two to detect the power status of a LCD TV and an A/V Receiver; operated as expected once I used three turns of the power wire thru the sensing coil. NO instructions were available to indicate which way to turn sensitivity control to make fine adjustments, and NO LED to indicate when the relay is energized. This made set-up more difficult / time consuming. Low cost is nice but sometimes more features and information is a better value.

I supplied 12Vdc to the power terminals and the LED lit up to indicate that it had power.I ran one 18awg wire to a 9w, 120 Vac light, which draws about .1AThe relay does not operate.I tried adjusting the potentiometer to both extremes and still no difference.

Works very well, sensitivity seems stable for my 110v monitoring application. Draws <5mA on standby (relay off), <40mA triggered (relay on) with a 12v supply. I'm only switching a 12v security system signal so no problems with isolation risk. Would recommend using an offboard 110/220v relay if that's what you need to switch.

The FIRST one I received worked several times while setting the sensitivity then the relay stuck closed. A power off didn't unstick the relay. I understand getting a bad one but just seems more common these days.I ordered another and requested a refund for this one. The second one works like a champ... so far, so good. I bumped my rating to 4 stars. Now I just need to see how long this thing will last.

Nice that everything you need is on one card. I don't know how it sells for such a low price!.One thing might be to have an item in the data sheet that tells you which to turn the bias potentiometer to increase or reduce the actuation current level. I did it by trial and error.

I purchased this to repair / modify a smart outlet strip and was very happy to find this on Amazon.The first problem when I got it was that the layout around the relay output is surrounded by the signal side ground plane (no safety spacing per UL or IEC requirements). So it will eventually fail from a flashover from the relay line side to the low voltage control circuit, which was no good for me since I was powering it from my PC USB port. But, I was able to take the relay off board and use it that way without the PCB carrying the relay power contact circuits.Another note: the Vref on the board is just a resistive divider, so if your power supply moves around much, your trigger point is going to change.I hope this supplier redesigns with proper creepage and clearance spacing for 250VAC.