One of the biggest issues you will run into with anything connected to an AC power is if that device or equipment is receiving power. In the pool service industry, this often is the case when you find that a pool pump won’t turn on. Or if a pool timer doesn't on, is it receiving power? Also for repairs with so many breakers being unmarked, how do you know you turned off the right breaker. Bottom line, a non-contact detector like the Mr. Pen is an easy way to see if power is going to the equipment/device and the line is active.
A non-contact voltage detector is just that. You don’t need to make contact with the line like with a Multimeter. Plus you don’t need to adjust any settings or knobs to get a voltage reading. Simply hold the Mr. Pen over a cord or wire whip and if there is AC power a red light will turn on and an audible beep will come out of the device. A very easy way to tell if power or a current is present.
One thing to note is that a non-contact detector will not tell you the line voltage. This is important if you need to know if say a pump motor is receiving enough voltage from the breaker. Sometimes a dip in voltage will cause a pool motor to burn out or stop working so there is no way to tell if the motor is receiving 220 volts or 198 volts. For that, you will need a Multimeter.
For most applications that are not a real issue and all you want to know is if the device or equipment receiving power. This device will tell you right away. No light means no power. Red light and beep will mean there is power. There are several of these non-contact detectors but I find a simple one like this for $10.00 is good enough for DIY applications.
Before you do anything electrical and touch any wires, using one of these is a perfect way to prevent you from being shocked. It also will let you know right away why something is not working. Is it due to having no power or is it another issue? That is where Mr. Pen excels as a must-have tool.
About Mr. Pen:
Mr. Pen- non-contact detector determine the presence of magnetic field without contact
Insulation operation ensures the safety of testing. You can use this non-contact AC voltage detection to check whether a cable, wire, or socket contains AC voltage.
lightweight, compact tool with pocket clip provides convenient storage and quick access.
It can be used for home appliance repair, circuit inspection, and DIY.
The perfect tool for home users, electrical and electrical system engineers, etc.
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