The Simpson MR36W500DCMAR 25R Analog DC Milliamperes Panel Meter is a reliable and accurate instrument used for measuring the flow of DC current in a circuit. With a range of 0 to 500 milliamperes, this panel meter provides precise readings for industrial and commercial applications. The Simpson brand is known for its quality and durability, making this model a trusted choice for professionals in the field of electrical testing and measurement.