The Clamp Ammeters is an instrument for measuring electric currents very similar to the voltmeter, multimeter and polarimeter, systems that have the galvanometer as a central element.

It consists of an integrated resistance in parallel that allows it to calculate the amperage of the current under examination, and it is also waterproof and safe to use.

Amperage is the intensity of the current flow, i.e. the number of electrical particles passing through a conduit, measured in “amperes”.

We had selected some of the best clamp ammeters for you that are listed below.

BTMETER BT-7200APP TRMS 6000 Counts Clamp Multimeter, Digital Clamp-on Ammeter...
  • ⚡【Monitoring on Your Phone】Smart clamp-on multi tester BT-7200APP can auto connect to your Android / Apple phones or tablet...
  • ⚡【AC DC Clamp Amp Voltmeter w/ NCV】This clamp multitester can accurately measure AC/DC Amperage, AC/DC Voltage, Resistance,...
  • ⚡【Continuous Data Logging Clamp DMM】This clamp-on meter can displays AC DC amps, volts, ohms, Cap, Hz Temp in Max/Min on the...
  • ⚡【Reliable True RMS Voltage Amperage Meter】0.1 amp resolution for 0.1 ~ 60A AC DC current, 1A for 60 ~ 400A to support...
  • ⚡【Clamp On Live Wire for Measurement】To measure amp with this clamp meter, you MUST separate the hot and neutral conductors,...
DC Current Clamp Meter 6000 Counts Auto-Ranging Digital Ammeter Amp Ohm Hz Live...
  • [Upgraded Clamp Meter]: Upgraded chips greatly increase the product performance, which makes testing more accurate and steady.
  • [0.1mA AC Resolution]: Delivers 0.1mA AC resolution and sensitivity.
  • [1mA Resolution]: Delivers 1mA resolution and sensitivity, which make it a great a tool for measuring such as parasitic draws.
  • [Dual Line Display]: Dual line display can show both AC voltage/current and frequency on the screen.
  • [Back Clip Design]: Back clip make it more portable, hang on your belt or pocket.
SaleRANK NO. 3
BTMETER Digital Clamp Multimeter BT-570S-APP, 6000 Counts TRMS Clamp-on Ammeter...
  • ⚡[Wide Range Avometer] True-RMS AC/ DC amps multitester can accurately measures DC volts 0.1mV~1000V; AC voltages 1mV~750V; DC &...
  • ⚡[Smart Amps Meter] Download customized App for Android/ IOS phones on Google Play or APP Store, which allows you to real-time...
  • ⚡[Safe NCV Detector] 45mm large jaw design can easily clamp on thick wires and take amperage measurement without breaking into...
  • ⚡[Voltmeter for Various Purposes] Combining multiple functions in one, BT-570S-APP DMM is ideal for troubleshooting electric...
  • ⚡[Humanize Designed Multitester] Loads of small details you ever need in daily operation: Data Hold to freeze reading for later...
New Clamp Meter, 6000 Counts Digital Clamp Multimeter Portable Tester Auto-Range...
  • 🔵【Multi-Function Universal Clamp Meter】HP-7200D clamp meter can be used to measure AC/DC current, AC/DC voltage,...
  • 🔵【Compact Ammeter】This digital clamp meter is smaller than other types of clamp meters, easy to carry when going out,...
  • 🔵【Simple Operation】HP-7200D multimeter has automatic range function, wide measurement range and easy operation. There are 5...
  • 🔵【Large LCD Display】Upgraded and adopted 6000-digit digital and analog bar graph LCD display with a character height of...
  • 🔵【Saving Power】This voltage clamp meter is powered by batteries (free batteries), and it will automatically shut down if it...
SaleRANK NO. 5
Digital Multimeter Pocket Clamp Multimeters Multi Tester Voltmeter Ammeter...
  • 【𝟮𝟬𝟮𝟯 𝗨𝗽𝗴𝗿𝗮𝗱𝗲𝗱 𝗠𝗮𝘁𝗲𝗿𝗶𝗮𝗹𝘀 & 𝗗𝗲𝘀𝗶𝗴𝗻】--- Made of...
  • 【𝗪𝗶𝗱𝗲 𝗔𝗽𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻 & 𝗠𝘂𝗹𝘁𝗶𝗳𝘂𝗻𝗰𝘁𝗶𝗼𝗻】---...
  • 【𝗢𝘃𝗲𝗿-𝗹𝗼𝗮𝗱 𝗣𝗿𝗼𝘁𝗲𝗰𝘁𝗶𝗼𝗻 & 𝗜𝗻𝘀𝘂𝗹𝗮𝘁𝗶𝗼𝗻...
  • 【𝗕𝗮𝗰𝗸𝗹𝗶𝗴𝗵𝘁 𝗗𝗶𝘀𝗽𝗹𝗮𝘆 & 𝗦𝗶𝘇𝗲 𝗣𝗼𝗿𝘁𝗮𝗯𝗹𝗲】---...
  • 【𝗠𝗶𝗹𝗸𝘆 𝗛𝗼𝘂𝘀𝗲 𝗚𝘂𝗮𝗿𝗮𝗻𝘁𝗲𝗲𝗱 & 𝗣𝗮𝗰𝗸𝗮𝗴𝗲...
Digital Clamp Multimeter AC DC Voltmeter Ammeter Ohmmeter Volt Tester LCD Meter...
  • TROUBLESHOOTING:This Digital Clamp Multimeter is designed to safely and accurately troubleshoot a variety of automotive and...
  • MULTIPLE FUNCTIONS:This Digital Clamp Multimeter supports voltage testing function for both AC and DC voltage and low battery...
  • QUICK CHECK & ACCURATE RESULT:The Clamp Amp Meter Features large digital display for battery quick check and accurate results,...
  • SAFE TO USE:Overload protection on all ranges. You can use this Clamp Multimeter to do unidentified wire testing, non-contact...
  • EASY TO READ:This Digital Clamp Multimeter adopts with large digital display screen. Measuring instrument with function of data...
SaleRANK NO. 7
Digital Clamp Meter AC DC Meter AP-7200B Clamp Amp Meter TRMS 6000 Counts...
  • ➤【Multifunction Clamp Meter】 6000 Counts Auto-range AC/DC amps clamp multimeter with the DC Voltage range:600mV~600V, AC...
  • ➤【True-RMS Clamp Meter】 This multimeter can accurately measure AC/DC Current, AC/DC Voltage, Frequency or Duty Cycle,...
  • ➤【NCV Detection Function】Non-contact voltage detection effectively check electrical status through measuring EM field...
  • ➤【Accuracy AC DC AMP Meter】 This clamp meter with the AC/DC Current Range : 60A~400A; and it provides meaning full...
  • ➤【Safety Guarantee】 Safety standard IEC 61010-1, CAT III 600V. Double insulation. 48 Months product warranty provided. 7/24...
SaleRANK NO. 8
AstroAI Digital Clamp Meter 2000 Counts, Multimeter Amp Meter with Auto Ranging;...
  • 2000 COUNTS CLAMP METER:Check out our VIDEO on the left side and take a quick tour of AstroAI Multimeter! TEST A WIDE RANGE of...
  • AUTO POWER OFF SAFELY:The amp meter's sampling speed of 2 times per second; If the meter is not in operation for 15 minutes,it...
  • CONVENIENT FEATURES: Included Data Hold/Max Hold and a Large, Digital LCD Display, and Extra Large Clamp make for easy use while...
  • SAFETY FEATURE: Transformer Jaws pick up AC Current flowing through the conductor, increasing safety while improving this...
  • EASILY CARRING AND DURABLE:Commercial settings where it can handle the demands of a long workday, from the durable exterior to the...

Buyer Guide to Choose the Best Clamp Ammeters

Clamp Ammeters allow us to measure the current and amperage of power lines very precisely. If you are not an expert electrician, it can be challenging to choose the right one, and therefore in the next part of the guide, we will explain some relevant aspects.

What Is a Clamp Ammeters?

In general terms, an ammeter is nothing more than a galvanometer, and an instrument used to detect quantities of current to which a parallel resistance is added, called “shunt resistance”. The AmmeterAmmeter then measures the intensity of electric currents by having a wide range of ranks or scales.

The ammeters have a minimal internal resistance, less than 1 ohm, so as to prevent its presence from reducing the value of the current to be measured when connected to an electrical circuit.

Nowadays ammeters have digital converters to measure voltage drops and microprocessors with displays.
How does an ammeter work?

Modern ammeters are compact, insulating, and fit into any pocket. In the world of electricians, they are commonly called “testers” and are used to measure the intensity of the current.

The digital ones work in a straightforward way: just turn the knob to choose the parameter and connect the tips of the diodes. After joining the test leads or the terminal to the power, the data will appear on the screen.

Analog models (used much more rarely) reveal information through a needle that moves in the numerical range, while modern digital models show the measurements ordered on a screen in a much more reliable, precise, and easily readable way.

What Are the Uses of An Clamp Ammeters?

In addition to being an essential tool for any electrician, ammeters are useful in many activities. For example, they can be used at home to measure the power of a battery such as that of a vehicle or to measure the capacitors of cell phones that generate energy and for air conditioning compressors.

In professional use, the AmmeterAmmeter is used to measure the current flowing through a cable and is therefore very useful in order not to exceed the amount of energy carried by a given conductor.

By measuring the current in the electrical panels and in the sockets, we can prevent short circuits and electrical failures that could cause accidents.

Can I Use the Clamp Ammeters to Reduce Electricity Consumption in The House?

The answer is yes. The AmmeterAmmeter is used to determine the consumption generated by a particular electrical device, and you can also find out which type of conduit is most appropriate for a specific circuit and whether the connected loads fall within the safety limits of the socket.

This information will allow you to reduce consumption.

In large circuits, such as the electrical network of an entire block, knowing the amperage is vital for safety and for ensuring power for citizens. It is essential to keep the amperage under control to avoid power outages or worse that a short circuit can burn the cables.

How Many Types of Clamp Ammeters Are There?

The most commonly used ammeters are digital ones, widely known as “testers”, but there are also other types with different characteristics and functions. In the list below, we will explain the various types:

  • Analog Clamp Ammeters: they are the most classic models. They contain a coil connected to a needle that shows the measurement by means of a numerical scale.
  • Electromechanical Clamp Ammeters: they are composed of a fixed organ and a free organ connected to the needle. It is a more extensive system that suffers the wear of its components and is prone to reading errors.
  • Magnetoelectric Clamp Ammeters: formed by a coil that rotates around an axis when it receives current.
  • Electromagnetic Clamp Ammeters: works like the previous one, but in place of the coil, there is a magnet that moves with the current.
  • Moving Iron Clamp Ammeters: instead of a coil or a magnet, it contains a moving iron bar.
  • Electrodynamic Clamp Ammeters: they work with two magnets that separate during the reception of the current and based on this distance, we read the measurement.
  • Thermal Clamp Ammeters: they work by heating a conductor. The main advantage is that they are not affected by magnetic fields, although they are more expensive and energy-consuming instruments.
  • Digital Clamp Ammeters: They are the most accurate, having microprocessors and screens that eliminate reading errors. They rarely suffer from wear problems, while the accuracy of the measurements depends on the quality of their circuits.
  • Current Clamp Ammeters: this type of AmmeterAmmeter does not need to come into contact with the energy source to take the readings as it is guided by the magnetic field of the current and is capable of measuring both alternating and direct current.

What Special Functions Do Clamp Ammeters Have?

Some clamp ammeters have special functions that are very useful for diagnosing problems within electrical systems, and one of them is measuring frequency.

To comfortably analyze the currents, the ammeters must have an average, minimum, and maximum function in order to compare the readings and previous results.

Measurement of capacity is also instrumental, a function that is now incorporated in most clamp ammeters and which in particular facilitates the work of those engaged in the study of motors.

The protection and safety functions are also essential, such as the activation of a hum in the presence of nearby currents.

What Safety Measures Should I Consider when Using a Clamp Ammeters?

Ammeters are used to measure voltage and electric current. If you work with electricity, you must be aware of the dangers and risks. Therefore it is essential to take the right precautions while always maintaining the correct safety measures.

Below are the details of the measures necessary for the use of the AmmeterAmmeter:

  1. The current must flow through the meter in order to complete the circuit.
  2. Make sure all components are connected securely so you can get a good read.
  3. Use tools with rubber grips to avoid electric shock.
  4. Never connect the AmmeterAmmeter to the main power supply, such as a junction box.
  5. Make sure you work in a dry environment free from moisture.
  6. Before starting work, make sure that the AmmeterAmmeter has the scale of the maximum resistance level.
  7. Do not touch the power source with your hands.
  8. Never handle installations with bare hands when there is power.

Purchase Criteria

Ammeters are highly complex systems, especially digital models, a necessary feature for these instruments that make exact measurements of current and voltage.

If you are looking for the best model on the market and equipped with the most useful functions, follow our tips and you will be sure to make the right choice:

  • Comfort
  • Utility
  • Resolution
  • Precision
  • True RMS
  • Operating system
  • Special functions


The design of clamp ammeters has evolved in recent years, and the materials used in their construction have also changed enormously.

The most modern models have tools that allow you to take readings in places that are difficult to access, among these we have removable screens from which you can observe measurements from a distance.

Most professional electricians recommend models with calipers to facilitate measurement. Since these work, via the magnetic field that generates electricity, you will not be forced to cut or strip the cable to connect it. We also suggest you choose screen models because they are easier to read.


The clamp ammeters have the ability to perform different types of measurements, and the most common is precisely the voltage and the current, both alternating and direct.

Depending on the complexity of the model, the reading functions vary. Some systems include options for reading voltage, resistance, continuity or even capacity.

We recommend you choose a model that has all the functions you will need in your work environment. Otherwise, you would risk a bad investment. Although digital ammeters are very versatile, their usefulness will still depend on the use you will make of them.


Resolution plays a significant role in purchasing clamp ammeters. The accuracy of the measurements and values ​​shown when reading the system will depend on it. Knowing the value of the resolution, it is possible to determine any change, even if very small, in the reading carried out.

To explain the importance of resolution with an example, we could tell you that it is useless to buy a ruler that measures centimeters if what you need to do is measure in millimeters.

Before buying an ammeter, we advise you to keep in mind the resolution you need in your work as this is an essential factor in determining the usefulness of the instrument.


When we speak of precision, we refer to the indication of the real value of what is measured. We recommend that you choose a device that has the highest possible accuracy, as the quality of the work will depend on it. The more accurate the measurements, the better you will be able to do your jobs.

In general terms, the reading precision has a value of 3%. It means that when measuring a quantity of 100 amperes, the reading could give three values ​​above or below the measurement. Usually, the precision margin is indicated by each manufacturer, and some ammeters may have additional specifications.

True RMS

Clamp Ammeters equipped with the True RMS function determine the actual correct value. These systems are more precise in that they obtain the measure by leveling the signal.

During the process, they adjust it to an actual value based on the dependence, without distinguishing between the shape of the output signal and the value of the coefficient to determine the real value.

These ammeters are able to measure the alternating voltage signals in a sinusoidal form with much more precision than the rest of the systems, while the models without the True RMS function are useful only for measuring electrical voltages that are not sinusoidal. Keep in mind that currents are not always sinusoidal, nor should they be.

Operating System

The operation of the clamp ammeters is straightforward, just select the parameter we want to measure, place the diodes in the corresponding connection area, and detect the measurement data directly on the screen. The selector has a straightforward rotation system with different selections for the same parameter.

The advantages of these selection systems are that we can use them without having to take off our protective gloves. Also, the selector allows you to turn off the AmmeterAmmeter when you are not using it, and some systems also have an automatic shutdown.

The clamp models measure directly from the cable by merely approaching the clamp and are considered very practical.

Special Functions

When buying a clamp ammeters, you need to take into account some special functions. If we do continuous work, the data retention function will be handy. Also, we suggest you always choose a system with overload protection in order to prevent short circuits and damage to the policies, extending their life.

Models with backlit screens will allow you to work in low light or even in the dark. The pliers are ideal for facilitating the work because they will enable you to take readings without having to cut or strip the cables.

Also, the switches and buttons for selecting the scales and the manual or automatic intervals are handy.

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