
I needed several of these devices to monitor various points of 24VAC power in the device. They only flicker on 24V. I noticed that they run on the 60-500 volt side, so apparently they're not rated for 20V. Will have to send them back. The notion that they are good for 20-500 volts is just wrong. The seller needs to change the description so it's not a lie.

π Johnson Level and Tool 400EM-S 12-Inch Heavy Duty Metal Combination Square for Professionals, with Inch/Metric Measurements, Silver - 1 Square
8 Review

TV bracket Kromax DIX-18 black
52 Review

Kapro 307-08-TMS Try And Mitre Layout And Marking Square With Stainless Steel Blade, 8-Inch Length
18 Review

π² Johnson RAS-1B Johnny Square: Professional Aluminum Rafter Square, 7'', Silver - Top Quality with 1 Square
8 Review