What is an emf meter?

Answer The "EMF" stands for "Electro Magnetic Field," and an EMF reader is used to test the strength of electrical devices, appliances and power lines. EMF meters work by measuring electromagnetic field r... Read More »

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How to Test Internet Speed With a Speed Meter and Internet Connection Meter?

Testing your Internet speed is relatively easy to do thanks to the numerous websites that test it for you. Among some of the sites that test Internet connection speed are and, ... Read More »

What is an RPM meter?

An RPM meter--better known as a tachometer or RPM gauge--measures the revolutions per minute (RPMs) of an engine's crankshaft. Unlike a speedometer, which allows you to monitor the speed of a vehic... Read More »

What is in a pH meter?

A pH meter is an electrical device that provides a measurement of the voltage difference between two electrodes immersed in a sample solution. The voltage difference is due to the concentration of ... Read More »

What is a ppm meter?

A peak program meter, or PPM meter, is an electronic device used to measure audio signals. While similar to a Volume Unit (VU) meter, a PPM meter offers superior performance and greater accuracy.Id... Read More »