Analog DC Voltmeter Type-0408

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৳750

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Product SKU: I521785252arW

Analog DC Voltmeter, 0-3 / 0-15V DC, Made in India

This simple analog voltmeter is great for experiments in simple circuits. Avoid the confusion of multimeters with this simple to operate analog low range voltmeter. Great for elementary and early middle school students. Supplied complete in styrofoam case.

Product Dimensions: 4 x 5 x 4 inch (Approx.)

Specifications
A
Range: -1 – 0 – 3V DC
Sensitivity: 0.1V
B
Range: -5 – 0 – 15V DC
Sensitivity: 0.5V

Accuracy: +/- 5%

Analog voltmeters measure voltage or voltage drop in a circuit. They display readings using a needle rather than a digital display. Voltmeters may be standalone devices or a part of a multimeter.

DC voltmeter image

Analog voltmeters use a wide variety of means to measure voltage, with d'Arsonval moving-coil galvanometers being most common. These devices use a coil of fine wire suspended within a magnetic field. The coil rotates and moves a pointer or other indicator proportional to the applied current level.

Moving-coil galvanometers are typically used to measure current in ammeters, but when provided with suitable resistance can also measure DC voltage in voltmeters. They are desirable due to their superior sensitivity but are unsuitable for AC measurement because they are responsive only to average current flow. Moving-coil voltmeters may accurately measure AC voltage if they are fitted with a rectifier and transformer.

A second voltmeter type uses taut-band suspension, which also employs a moving coil. Taut-band meters eliminate the pivot and jewel mechanism employed by d'Arsonval meters and replaces it with a twisting platinum band. This setup mitigates friction, which is the cause of wear and repeatability problems in moving-coil instruments.

Analog voltmeter readings are subject to errors caused by measuring on an unlevel surface (in which gravity pulls the needle downward) or near a magnetic field. For these reasons users should carefully investigate the meter's environment before calibrating and measuring.


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