Analog Voltmeters Manufacturer & Factory
Partopia is an analog voltmeter manufacturer and factory based in China Wenzhou. We offer OEM & ODM services to help our customers grow their own brand!
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Buy Reliable Analog Voltmeters in Bulk
Partopia offers a full line of calibrated analog voltmeters for voltage test work in different industries. Our analog voltmeters are compact and portable, and they come in various configurations.
The indicator or pointer is designed with such high precision that its hovering sensitivity reaches the microampere level. Besides, our voltmeters are resistant to temperature variations and other physical parameters.
Our ferrodynamic voltmeters are suitable for measuring both AC and DC voltages in a wide range of circuits. They are available in panel-mounted versions for installation in cabinets, enclosures, and other equipment, as well as models specifically designed for educational use, which are widely adopted by schools and training institutions.
Analog Voltmeter
Educational Portable Ammeters & Voltimeters
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FAQs about Analog Volmeters
What is an Analog Voltmeter?
An analog voltmeter is a measuring instrument that indicates voltage using a pointer moving across a calibrated scale. Inside the meter, a mechanism—often a D’Arsonval galvanometer—converts electrical current into mechanical movement. When current flows through the meter, an electromagnetic force is generated, causing the pointer to deflect. The angle of deflection is proportional to the applied voltage. The more voltage there is, the farther the pointer moves. Because it uses a moving pointer, it’s easy to see how the voltage changes in real time.
How do you Use an Analog Voltage Meter?
Here is a step-by-step guide of using an analog voltmeter:
1. Check the Range and Polarity
First, look at the range selection switch on the dial and make sure we’ve chosen the right voltage range (for example, 20 V or 200 V).
When using an analog voltmeter, you also need to pay attention to polarity. For DC measurements, connect the red probe to the positive side (+) (higher potential) and the black probe to the negative side (-) (lower potential). If the probes are connected incorrectly, the pointer will deflect in the opposite direction and may cause damage to the meter.
2.Connection and Measurement
After connecting the probes to the circuit we want to test, observe how the pointer moves on the dial. To read an analog voltmeter, we need to look at where the needle points on the scale and estimate between the markings to get a more accurate value. Unlike digital meters that show the number directly, reading an analog meter usually requires a bit more judgment and experience.
3. Analyzing the Results
Since an analog voltmeter shows voltage with a mechanical pointer, it can clearly reflect instantaneous voltage changes, like fluctuations or pulses. This makes it very useful when we want to observe how the voltage in a circuit changes over time, which digital meters usually can’t show as clearly.
How do you Read an Analog Voltmeter?
Once switching on the circuit and the pointer becomes steady, we can start taking the reading.
- Check the Range and Zero Position
Before reading the value, make sure the pointer is at the zero mark on the dial. If it deviate from zero, use the small zero-adjust screw on the side of the meter (usually marked Z or ZERO) to bring it back to 0. Otherwise, Otherwise, a systematic error will occur in the measurement.
- Read the Needle Position
Look at where the pointer is pointing on the scale and record the value. Since the needle often falls between two marks, we usually need to estimate the value.
Method 1: Linear Estimation
If the pointer is between 7 and 8 and closer to 7, the reading might be about 7.2 or 7.3. A common approach is to estimate how far the needle is from the lower number. For example, if it’s about one-third of the way from 7 to 8, the reading would be roughly 7 + 1/3.
Method 2: Rounding Down
If we want a conservative estimate, or if the needle sits exactly between two numbers (like 7.5), you can record the lower number (7). However, this method may make the reading slightly lower than the actual value.
- Convert According to the Selected Range
Analog meters usually have several ranges (like 10 V, 50 V, or 250 V). The scale printed on the dial is often fixed (for example 0–250), and the pointer position is proportional to the selected range. After obtaining the pointer value, it must be converted according to the currently selected range.
*Procedure: Read the value indicated on the scale (for example, 7.5), then multiply it by the ratio between the selected range and the full-scale value of the dial.
*Example: If the dial scale is 0–250 and the pointer indicates 7, selecting the 250 V range results in a reading of
(7/250)×250=7 V(7/250) × 250 = 7\,V(7/250)×250=7V.
If the 10 V range is used, the reading becomes
(7/250)×10=0.28 V(7/250) × 10 = 0.28\,V(7/250)×10=0.28V.
Can AC Voltmeter Measure DC?
In most cases, traditional AC voltmeters—especially rectifier-type analog voltimeter—can’t be used to measure DC voltage. However, some special AC voltmeters, such as electrodynamometer meters or moving-iron meters, can measure DC voltage, and the reading will match the actual DC value.
What is the Difference between Analog and Digital Voltmeter?
These two types of voltmeters are quite different in how they work and how they display readings:
- Display Method:
Analog voltmeters use a mechanical pointer and scale, which makes it easy to see trends and fluctuations in voltage. Digital voltmeters just show the number on a screen. - Accuracy
Analog voltmeters can have parallax errors when you read the pointer, and the resolution is lower at higher ranges. Digital volttmeters are usually more accurate, with smaller errors, and the numbers are easy to read.
Frequency Response: Traditional analog AC voltmeters (rectifier type) can measure only the RMS value of sinusoidal signals and are sensitive to waveform distortion. Digital voltmeters, particularly digital multimeters, typically have a wider frequency response and can measure non-sinusoidal signals more accurately.
Which is better, an Analog Voltmeter or Digital Multimeter?
These two types of voltmeters are quite different in how they work and how they display readings:
- Display Method:
Analog voltmeters use a mechanical pointer and scale, which makes it easy to see trends and fluctuations in voltage. Digital voltmeters just show the number on a screen. - Accuracy:
Analog voltmeters can have parallax errors when you read the pointer, and the resolution is lower at higher ranges. Digital volttmeters are usually more accurate, with smaller errors, and the numbers are easy to read. - Frequency Response:
Traditional analog AC voltmeters (rectifier type) can measure only the RMS value of sinusoidal signals and are sensitive to waveform distortion. Digital voltmeters, particularly digital multimeters, typically have a wider frequency response and can measure non-sinusoidal signals more accurately.
There is just a small sample of our Analog Voltmeters because most of our orders serve for customization needs.
What’s your custom Analog Voltmeter requirement? Tell us, we customize it for you.
