The Amprobe HD160C Heavy Duty Multimeter is designed for professional use in harsh environments. The HD160C is made using waterproof construction to prevent dirt, grime and moisture from entering the case and causing inaccurate readings or damaging shorts.

Built with tough, fire-retardant thermoplastic that is resistant to grease and chemical spills and with shock-mounted components that are drop resistant to at least 8 feet, the Amprobe HD160C is unusually rugged and reliable. It has an extended voltage measurement capability of 1500V DC and 1000V AC, unmatched by any other line of digital multimeters. The extended voltage ranges can withstand transients up to 12 kV, and it also measures temperature.

Why you need a True-RMS Reading Multimeter

True-RMS instruments are accurate on any AC waveform. There are two basic AC measuring systems. One is "average sensing, RMS indicating." This is the most common system because it is affordable and easy to manufacture. An instrument with this type of measuring system measures the average of a sine wave, and then multiplies it by 1.112, allowing the instrument to indicate RMS. This measuring system is only accurate on sine waves.

The second measuring method is called "RMS Sensing, RMS Indicating." An instrument with this type of measuring system computes the RMS value of the measured waveform (sine or otherwise). This is referred to as "True-RMS" reading. This measuring system is accurate for any waveform. When an average sensing instrument is used on a non-sinusoidal waveform, measurement accuracy could be off as much as 50%. Since you may not know what type of AC waveform you are measuring, a True-RMS instrument should be used whenever possible.