Triplett ET30 Non-Contact Magnetic Field Detector - AC/DC/Permanent

Works great, used it to verify which valves were activated on my sprinkler system.

Excellent magnet detector it helps me to trouble shoot solenoids, for people who doesn’t know this is not a voltage detector.

Poor quality all around. Package a pain to open, battery compartment opening very difficult to figure out and, oh yeah, it does NOT detect any magnetic fields. Poor value, does not function, difficult to use. Flashlight works ok, but doesn't stay on unless you keep your finger on the button.

This tool help me diagnose a misfire on my pick up truck definitely recommend

The pen did not detect either AC or DC on a consistent basis, very unreliable. Instructions are not clear on either battery installation or use of device. I gave it 2 stars because the flashlight part worked well. The package cannot be used again, it had to be cut to open, and thus is not eligible for return. Changed review to 1 star, the flashlight even stopped working. You get what you paid for, or less, with this item. Do not buy!

Pretty handy, when you need it. Worked for my application. May never use again in your lifetime. Can use a compass to do the same thing.

Bought it on a whim. It really works. Still experimenting with it, but it is a real tool. It will not sense magnetic field from low to moderate DC current flow in a single wire. It will not sense magnetic field in a refrigerator magnet. See Halbach Array on Wikipedia.

Very expensive flashlight. Its the onlything it works on it, does not detect any voltage at all. Dont buy

Works better than I expected it to for checking DC hydraulic solenoid valves. It is a little tight getting the cap off to swap batteries, but nothing you can't handle with a little flathead screwdriver. The light on this is useless though, but that's not what you're buying this for.

mal muy mal solo funciono la linterna