Measuring the speed of a fast-moving rotary system can be a bit difficult if lack the right equipment for the job. Aside from that, you can easily injure yourself.
To avoid this, you should consider using the digital tachometers that we have listed below. With the help of these devices, you can safely take diagnostic rotational measurements of moving machine parts.
This review list covers both contact and non-contact digital tachometers, so it is up to you to choose the gadget that matches your needs.
With the right tachometer, you can easily measure the rotational speed of different types of machines.
Plus, we have only gone for high-quality tachometers from trusted brands. We’ve also tested most of the devices, so you can make your order knowing that you are buying a product that is not only worth it but also reliable.
11 Best Digital Tachometers
Editor’s Choice: Performance Tool W89719 Professional Digital Laser LCD Tachometer
- Use to accurately measure the RPM without touching the object, displays it on a LCD screen.
- Measures the rotational speed with a visible Red LED beam.
The W89719 is a highly accurate tachometer that can take non-contact measurements ranging from 2.5 to 99,999 RPM.
We highly recommend this device to users because it has a practical design and also comes with a long list of features that you can rely on when taking angular momentum measurements.
For starters, this device uses a class II laser, which is proportionally stronger compared to class I counterparts. This feature makes the W89719 an ideal option for taking long-distance measurements.
If you are familiar with how laser tachometers work, then you must be aware that when the tachometer moves further away from the object being measured, accuracy is reduced.
However, this device will provide you with accurate readings even when you place it several inches away from the machinery that you are measuring.
All the same, you have to ensure that the distance between the object and the tachometer is within the recommended range since this will determine the type of results that you will get.
The built-in memory records and stores the maximum, minimum, and most recent readings taken by the tachometer. As such, you won’t lose your data after you are done taking measurements.
This equipment is powered by a 9V battery that will provide you with long-lasting service. Aside from that, it comes with reflective tape that is up to 24 inches long.
The tape is very useful because it creates a perfect spot that the laser beam can land on with every rotation that is made.
- Professionally designed
- High-quality construction
- Auto zero adjustment
- Replacement tape is not included
Most Accurate: Neiko 20713A Digital Tachometer
- TACHOMETER VS. SPEEDOMETER: While a digital speedometer will read the current speed of a vehicle, this automotive tachometer is used for measuring the rpm of a revolving shaft, as with the driveshaft of an automobile.
- ACCURATE RPM METER: This handheld tachometer is highly accurate and noncontact. With high-speed laser-aim operation and instant readings from 2.5 to 99,999 rpm, this radar gun gives you accurate rotational speed readings from a distance.
Accuracy is one of the factors that you should consider when using any measurement tool. And that is exactly what the Neiko 20713A offers.
Being one of the tachometers that we tested, you can fully count on this device when taking measurements from moving parts.
Besides, it has a straightforward design, so just about anyone can use this device. This tachometer offers an accuracy of +/- 0.05%, making it one of the most accurate tachometers that is currently available on the market.
It falls in the same measurement range as the W89719 since both units can take readings from as low as 2.5 RPM to 99,999 RPM.
This non-contact tachometer is equipped with highly responsive sensors and a powerful laser beam that works in concert to ensure that you get accurate readings in all scenarios.
More on the beam, it will allow you to take measurements from as far as 20 inches. Nevertheless, you should try your best to keep the tachometer close to the target object since it increases accuracy.
This device can assist mechanics, metalworkers, woodworkers, and other users who run heavy machinery regularly.
With this tachometer, you can easily measure the speed of your lathe machine, motor, etc. Like the device before it, the Neiko 20713A ships with reflective tapes for your convenience.
The LCD screen displays the readings in large font, allowing for easy readability. This means you won’t have a hard time when recording your measurements.
- Advanced memory function
- Batteries are included in the package
- Lightweight design
- The storage case is not as durable
Best Budget Buy Tachometer: AGPtek® DT-2234C+
- ACCURATE MEASUREMENT:Wide measuring range(2.5RPM to 99999 RPM);High resolution(0.1RPM or 1RPM).Accurately measure the speed of motors and machine parts.
- TECHNOLOGY&DISPLAY: The use of microcomputer technology, anti-jamming technology and other advanced technology, can accurately measure the speed value. Large screen liquid crystal display, clear reading.
The tachometer from AGPtek is a highly advanced unit that will provide you with precise measurement readings when working with different industrial equipment.
One thing that we liked about this device is that it has a wide measuring range, so it can help you measure the rotational speed of different classes of machines.
In fact, you can even use it when measuring the speed of lathe machines. The laser has an exceptional detecting distance of up to 20 inches, meaning the tachometer can accurately take measurements, provided that you are within this range.
To make it even better, this equipment can store minimum to maximum values that are recorded during usage.
In addition to this, it won’t lose the last measurement that is taken, thus making it even more convenient.
This gadget is fitted with a large LCD screen to improve visibility. The screen has a function annunciation feature that will simplify your work when customizing the device.
Furthermore, the single-chip microcomputer on this tachometer can perform simple mathematical calculations based on how fast the object is moving.
It can achieve this function by counting the number of times that the laser beam touches the reflective mark. This will help you determine the number of revolutions that are made per unit time.
The housing is uniquely shaped to match the shape of the palm of your hands, thus increasing user comfort.
- Easy to work with
- Highly accurate
- Ergonomic design
- Not the best option for professionals
Best High-End Tachometer: Extech 461920 Mini
- Item is a Class II laser product, 1mW power output.
- Laser Light Source used for greater accuracy and longer measuring distance
Like the W89719, the Extech 461920 is a class II tachometer, making this one of the reliable options that you can use when taking long-distance diagnostic measurements of moving parts.
With a target distance of 20 inches, you can safely take non-contact measurements from high-speed machine parts without injuring your fingers.
Moreover, the device comes with everything that you may need, so you can set it up right out of the box.
This device is exceptionally versatile and can assist professionals in different fields. It can particularly come in handy in a workshop setting since it is well suited for measuring the rotational speed of most power tools.
With that said, you can use it on drills, router machines, lathes, and any other equipment with an electrical motor.
By using the memory function, you can save the last reading that you took on this device. It does not end there; the onboard microcomputer can also recall the max/min readings. That way, you can always obtain the measurements should there be a need to do so.
The maximum measuring range of this photo tachometer is approximately 99,999 RPM, so it can effectively measure RPM values of fast-moving objects.
To add to this, it has an accuracy of ±0.05%, so you can rest assured that this device will deliver precise readings.
Thanks to its ergonomic design, you can comfortably hold this tachometer for an extended duration.
- The display is backlit
- Double-molded casing
- Non-slip design
- Cannot take contact measurements
Best Value: CyberTech® Digital Photo Laser Tachometer
- ✔Measures the rotational speed with a visible red light beam from a powerful LED
- ✔High intensity class II laser measures from 2.5 - 99,999 RPM
CybeTech’s digital tachometer is also another excellent choice that you can consider using. It has multiple features that can prove helpful when working with motorized parts.
And like the Extech 461920, it uses a high-intensity class II laser that can take readings from 2.5 to 99,999 RPM. This device is cheaper compared to most tachometers in its class.
As a matter of fact, it falls in the same price range as the AGPtek DT-2234C+, making it yet another budget-friendly option that you can go for.
The light beam is visible in virtually all lighting conditions, so you won’t strain when positioning the tachometer on top of the reflective tape.
Also, the 5-digit display is wide enough and will allow you to view the readings without squinting.
There are only two buttons on this device that are conveniently labeled for identification purposes. This equipment is powered by four AA batteries, which are included in the package.
This device supports maximum, last, and minimum measurement memory, so it will store the data for future reference.
The edges of the housing are contoured to maximize grip, meaning the tachometer won’t slip from your grasp during usage. There is also a wrist lanyard that will safeguard the device against accidental falls.
- Well designed
- Delivers accurate results
- Powerful laser beam
- You will have to replace the batteries after some time
Best Tachometer for Small Engines: Electronic Specialties 328 EZ Tach Plus
- Versatile instrument can measure RPM on a wide variety of engines from string trimmers to automotive
- Reads engine revolutions up to 20,000 RPM
If you are looking for a tachometer that can help you take rotational measurements from small engines, 328 EZ Tach Plus is the way to go. This gadget can accurately count the number of revolutions that a machine makes per minute.
You can use it on motorcycle engines, ATVs, lawnmowers, generators, snowmobiles, and any other machine that falls within this category.
This device is equipped with responsive induction sensors that can assist you when working with a wide range of moving parts. Alternatively, you can use the wireless function and still get accurate results.
On the downside, this tachometer may not be as accurate compared to other models that use laser beams. Nonetheless, that does not mean that it is not reliable.
Its use can apply in simple applications that don’t require professional-grade accuracy, thus making it a suitable option for hobbyists. Moreover, it can measure up to 20,000 RPM of engine revolution.
To add to its list of features, the tachometer features a built-in flashlight that you can use when working in low-light conditions.
But, that is not all; the LCD screen is backlit, so you will be able to read the measurements even in the dark.
- Ergonomically designed
- Straightforward design
- Built to last
- The battery is not included in the package
Most Versatile: REED Instruments R7100
- Includes reflective tape, large and small cone tip adapters, funnel adapter, wheel adapter, batteries and hard carrying case
- Provides fast and accurate RPM (revolutions per min) measurements of rotating objects and surface speed measurements MPM (meters per min) with included contact adapters
The REED R7100 is unlike any other tachometer in our review list in that it can take both non-contact and contact diagnostic measurements. With that said, you can use the option that best suits you.
When in contact mode, the R7100 can accurately take measurements ranging from 0.5 to 19,999 RPM, while the laser beam function offers 2.5 to 99,999 RPM.
Plus, it can also measure the surface speed of objects in meters per second. When you use this feature, you can measure speeds within a range of 0.05 to 1,999.9 m/min.
This tachometer will help you identify mechanical issues that may be affecting the overall performance of your machinery.
It can be used when measuring the rotational speed of blowers, fans, conveyors, compressors, turbines, just to mention but a few.
The in-built laser can track the movement of objects with the utmost accuracy, thereby providing you with high-grade results.
This equipment ships with useful contact adapters that you can attach when measuring surface speed.
The fact that it has a memory function makes it even more efficient because it can store the max, min, and last values recorded by the processor.
When you buy this product, you will also get reflective tapes, so you won’t have to purchase them separately. To top it all up, it has an accuracy level of minus or plus 0.05%.
- Durable storage case
- Compact design
- Changeable adapters
- Uses class I laser
Best Compact Contact Tachometer: Jectse AR925 Digital Tachometer
- Applying the MCU and electrooptical technology, can perform contact measurement of rotating & linear rolling speed efficiently.
- 0.5-19999RPM, wide measuring range and high resolution.
Most of the tachometers that we have reviewed are purely non-contact, but that does not apply to this device. However, that does not mean that it won’t deliver good results.
The AR925 is one of the most reliable devices that can help you measure the linear and rotational speeds of most machines. It is equipped with a convex channel sensor that can pick up linear movement.
Besides, this equipment is designed with your safety in mind, so you can use it without worrying about anything.
This gadget comes with an array of interchangeable adapters that you can swap at will. As such, you can make changes depending on the shape of the object that you are working with.
Furthermore, this device can work with virtually all rotational systems with belts. It uses both electro-optical and MCU technology to take precise measurements.
Like the R7100, it has a measuring range of 0.5-19,999 RPM. The electronic elements making up the circuitry system are of premium quality, so you can buy this tachometer knowing that it will deliver long-lasting service.
The AR925 has a favorable measuring range, so you won’t be limited when recording readings from high-speed objects.
There is a low battery indicator that will help you know when to replace the batteries. The buttons are labeled to prevent guesswork when accessing the available function.
You won’t have to worry about the adapters coming off since they deliver a snug fit as long as they are attached correctly.
- Wide display
- The housing is made of high-quality ABS plastic
- Automatically stores min/max/last values
- No batteries
Best Mid-Range: QWORK Digital Tachometer
The digital tachometer by Qwork is one of the mid-range options that you can consider adding to your kit.
It is fitted with a powerful laser beam that will enable you to take speed measurements from 2 to 20 inches away from the target object.
This tachometer is suitable for measuring the rotational speeds of machine parts, fans, motors, lathes, etc.
The test button and the memory button are strategically placed to give you easy and quick access.
Plus, it is fitted with an easy-to-read LCD screen that will provide you with clear readouts when taking measurements.
Included in the kit are multiple strips of reflective tape that you use when marking the target area. That way, the laser beam will have specific point that it can land on as the object rotates.
It has an auto-zero function and other amazing features that will provide you with accurate readings. Aside from that, there is a memory function that allows users to store the most recent value.
The same applies to the minimum and maximum values, so you can easily obtain the measurements with the push of a button.
Unfortunately, this tachometer does not ship with the batteries, so you will have to buy them separately.
- Easy-grip housing
- Versatile design
- The storage case needs improvement
Best for Dusty Environments: PROTMEX MS6208A
- The MS6208A is a contact-type digital tachometer which is used in applications such as automobile maintenance, mechanical engineering, and maintenance of industrial equipment
- Measurement mode: m/min m/sec ft/min ft/Sec in/min.
The MS6208A is one of the contact-type tachometers that you can depend on when it comes to taking rotational measurements.
This equipment is highly accurate and is also equipped with an advanced LCD screen that can display multiple parameters at a go.
Moreover, the display is backlit for easy readability, especially when working in poorly lit environments.
In addition to this, there four different types of adapters that you can use on different machines.
The attachment point has a unique locking mechanism that will ensure the attached adapter stays in place even when the object in question is rotating at a high speed.
Plus, the extension handle will allow you to access hard-to-reach spots without causing damage to the tachometer or hurting yourself.
In terms of range readings, this unit can take measurements from 50 RPM to 19,999 RPM. This device uses four 1.5V AAA batteries, which are not included. It can record readings in ft. /sec, m/min, ft. /min, and m/sec.
- Has a battery indicator
- Detailed user manual
- Expertly designed
- Not as accurate compared to most tachometers on the list
Most Ergonomic: Tekcoplus THTK-187 Digital Non-Contact Laser Tachometer
- Tachometer is a high quality instrument to measure the revolutions per minute(RPM) with wide measuring range and high resolution
- High accuracy measurement, quick measuring time and long detecting distance up to 500mm(20 inch) with Laser.
Closing our list of reviews is the Tekcoplus THTK-187. This device is ergonomically designed to ensure that you get the comfort that you need when working.
It has a protruded handle that is uniquely contoured to limit slippage. The laser output is precision built to increase accuracy.
Additionally, the control panel and the screen are well placed for user convenience. When it comes to performance, this equipment can efficiently take measurements from 2.5 to 99,999 RPM and has a maximum detecting distance of 20 inches.
It has an accuracy of ±0.02%+1, which is slightly different compared to most of the gadgets that we have covered above.
Thanks to its contact-free design, you can safely use this device in scenarios where the use of a contact tachometer may be deemed dangerous.
This device is very easy to use since you only have to attach a reflective tape to the rotating object, after which, you can place the laser beam on the target area.
The built-in chip automatically records the number of times that the beam touches the reflective surfaces, thus providing you with accurate rotational measurements.
- Large memory
- Comes with reflective tape
- No replacement battery
Frequently Asked Questions
What is a digital tachometer?
In a nutshell, a tachometer is a device that is used to measure the number of revolutions that a rotary system makes per unit time. The measurements can be taken per second, per minute, etc.
Unlike, the analog models, digital tachometers are equipped with easy-to-read displays that will provide you with accurate readouts.
What is the best tachometer?
There two different types of digital tachometers, so you can either go for the non-contact or the contact models.
That being said, the term best in this respect, will depend on the purpose for which you want to use the thermometer.
To help you out, you can use the well-researched review list above since we have covered both models extensively.
How do you use a digital laser tachometer?
Digital laser tachometers are very easy to work with, thanks to their straightforward design. Firstly, you have to stick the reflective tape on the spinning object. After that, position the tachometer in such a way that the laser beam stays sits on the target area.
How does digital tachometer work?
As stated earlier, there are two main types of digital tachometers. The laser type tachometers are equipped with highly responsive light sensors that can count the number of times the laser beam is reflected as the object rotates.
Contact tachometers, on the other hand, are designed with free-spinning shafts that create pulses, which are further converted to RPMs by the onboard microcomputer.
How do I know if my tachometer is accurate?
The best way to go about this is by taking multiple measurements and comparing the data. If there is a large gap between the results, then the tachometer may be inaccurate.
Depending on the tachometer that you choose from the review list above, you will be able to take non-contact and contact measurements when working with different classes of machines.
Besides, some of the devices that we have hand-picked for you can accurately measure the rotational and linear speeds of moving objects.
To make them even better, the digital tachometers are ergonomically designed and equally lightweight.