Micrometers, unlike calipers, allow for more accurate thickness and linear readings of various materials, which is important for turning, jewelry making, or calculating electrical cross sections. Compared to mechanical micrometers, digital instruments are easier to use – with them it is not necessary to look closely at the risks on the scale, and the result is simply displayed in the digital value. The magazine’s experts analyzed dozens of popular models and the reviews available on them to highlight the best digital micrometers. The review will help to see the differences in the capabilities of the instruments, as well as their pros and cons, which will simplify the choice.
How to choose a micrometer
Before you go shopping, it is worth figuring out which micrometer is best. Here it all depends on the accuracy you need, the environment you use and the parts you measure. Here are the key factors to look for:
- Measuring range.Among the most common, there are four categories of micrometers, capable of measuring cross-sections from 0-25, 25-50, 50-75 or 75-100 mm. Ideally, it is better to have all four models to be ready to measure any part. Such an arsenal will come in handy for the turner. The jewelry craftsman can make do with the first option of 0-25, because it simply does not work with large objects. For special industrial tasks are designed micrometers with an upper limit of 125/150/175/200/225/250/275/300/400/500 and even 600 mm.
- Measurement step. A digital micrometer measures the cross section of workpieces, usually in 1 µm or 0.001mm. But other values are also possible (e.g. 0.01 mm), so you need to check this characteristic beforehand in the description and in practice.
- Accuracy class and uncertainty. There are two grades of accuracy, where 1 is the best. The accuracy of the device may vary from 2 to 50 microns, so if you are not interested in high accuracy, but only in comfortable operation, you may choose a micrometer with low class.
- Size and weight. The digital measuring instrument can weigh from 190 g to 2 kg, which affects the ease of use for hours on end. To avoid hand fatigue, choose a micrometer with a smaller mass. Dimensions (length) vary from 155 mm to 305 mm and up, and this affects the ability to put the instrument in your pocket or manipulate it in tight spaces.
- Ergonomics. Before buying take the micrometer in your hands. Assess the comfort of holding with your left hand – does it cover the screen. The right hand should easily reach the control buttons and ratchet. It is important that the elements that the operator holds on to are covered with anti-slip materials and have a textured surface, otherwise the risk of dropping the device increases.
- Convenient for transportation. Buying a micrometer in a blister will allow it to be used stationary on a workbench. If frequent transport will be involved, choose a product in a case equipped with a soft pad. This will prolong the “life” of the digital apparatus.
Rating of the best micrometers
It’s time to consider the top 5 best micrometers with display, which have good features and customers like in the reviews. You may find the right product for your task, which has already been tested by users.
|Rating of the best micrometers||1||MIK 100854||16 271€|
|2||NORGAU IP65 25-50mm-0,001mm 041057050||14 923€|
|3||CHIZ MCC-125||19 202€|
|4||MEGEON 80800||4 120€|
|5||Inforce 06-11-44||5 163€|
In first place a micrometer with multifunctional control unit. Five rubberized keys are provided for the user to reset readings, set relative zero, change units. Buyers in the reviews are pleased with the function of saving current values in memory, which allows you to compare the data after processing and see the changes. Measuring range is 75-100 mm, so the device is suitable for large objects. Steel arch is equipped with an anti-slip cover and it is comfortable to hold in hands. Due to the bend in the 16.5cm device can even measure pipe diameters up to 10cm. Accuracy class 1 gives readings with a minimum error. Step of the digital scale is 1 micron. The ratchet mechanism is designed to protect the instrument from breakage by sudden drum rotation.
The feature of this micrometer is the entry of the model in the State Register, and it allows using a digital tool for official measurements. Results of measurements can be considered in inspections.
- high-quality powder-coated metal;
- Ratchet with plastic embossed handle;
- convenient rubberized buttons;
- practical rod retainer.
- high cost;
- weighs 1 kg;
- Sold without case.
NORGAU IP65 25-50mm-0,001mm 041057050
And here is another quality micrometer, listed in the State Register, with which you can take measurements in the range of 25 to 50 mm. Measuring step is 1 μm and the error is less than 2 μm, which is the minimum value. The product weighs 325g, so it is much lighter than the previous model in the review. Contrast display makes it easy to see readings in bright sunlight. Measuring surfaces of the micrometer are made of stainless steel, ground and lapped. The rest of the body is made of mild steel and covered with enamel. The product comes in a plastic case which protects it against shocks. The device is powered by a battery SR44. If it “sits”, there is an engraved scale for mechanical measurement, which users like in reviews.
The main advantage of the micrometer, for which we put it in the list of best, is the protection against dust and moisture at IP65. This allows the device to be used not only in the rain, but even under direct water jets. Thus the micrometer is suitable for measurements in difficult special production conditions, e.g. in the chemical or food industry.
- comes in a shockproof case;
- does not slip out of hands;
- engraved second scale;
- Convenient rotation of the ratchet.
- high cost;
- the clamping screw is sharp and digs into the finger.
The third place was taken by the product from the domestic manufacturer “ChIZ”. The MIKC-125 micrometer is designed to measure linear dimensions from 100 to 125 mm. Accuracy class 1, so the error does not exceed 2 microns, and the step change in readings is 1 micron. But the device is quite large – its dimensions are 20x10x4 cm and it weighs 2 kg. The product comes in a wooden case with foam inserts inside, which protects the plastic parts and the screen from shocks. Included is a 10 cm calibration pin to help fine tune the micrometer before use by zeroing out the error. Reviews show that changing the batteries is very easy by unscrewing the plastic back cover with a special key from the kit.
Our experts believe the micrometer is the best because of the large arc, which allows you to measure the diameter of the pipes with high accuracy. Still, the device has the option of connecting to a computer via USB, which is useful for data collection and systematization.
- Supplied in a sturdy padded carrying case;
- The kit includes a calibration insert;
- IP54 moisture protection;
- Engraved scale in case the batteries run out.
- high cost;
- weighs 2 kg;
- It is not convenient to manipulate it everywhere because of the large size of the case.
And here is a worthy analogue for a lower price – a digital micrometer with a range of measuring linear length from 0 to 25 mm. The device is made on a steel base, but most of the body is covered with ABS material, so it does not slip. Drum wheel and ratchet are plastic and have raised surfaces. It has a fixing screw. Presented only two buttons to operate the micrometer and reset to zero readings during calibration. Requires only one CR1632 battery. Product comes in a plastic case, but there is no foam insert inside. Display readings are clearly visible in sunny weather when used outdoors. The micrometer itself is quite compact and easily fits in one hand.
This is the best micrometer in terms of price and accuracy. Despite costs 3-4 times cheaper than the competitors described above, the product has an error of only 2 microns. Step of measurement here is 0.001 mm. In reviews, owners praise the digital device for its accuracy when measuring cardboard, thanks to which you can weed out dishonest suppliers.
- simple, intuitive operation;
- affordable price;
- It is possible to fix it with a screw;
- easy zero adjustment.
- there are no marks for graphic measurement;
- No calibration plates included;
- A lot of plastic – if it falls, it splits.
The micrometer by the Russian brand Inforce completes the review. Measuring range is 0-25 mm. The device error does not exceed 2 microns. The digital device is powered by a single CR2032 cell. Dimensions of the case with a length of 15.5 cm makes it easy to carry in your pocket and manipulate in hard-to-reach places. Fluted handle does not slip in your hand. On the display, the user can choose a metric or inch display system. In their reviews the owners praise the micrometer for accurate measurements and convenience of the location of the “foot” fixing screw. It is facing the operator instead of the outside, so there is no need to twist your arm to clamp the rod.
The ideal tool for the frequent transport and carrying around of your work needs. The micrometer weighs only 190 g, so working with it for 4-6 hours a day will not tire your hands. Delivered in a strong carrying case, the corners of which are protected by steel plates. Even in case of a fall or bump, the saw case remains intact.
- The “foot” of the fixing screw is more conveniently located than that of competitors;
- Simple two button operation;
- smooth running ratchet;
- choosing a measuring system.
- no graphical scale;
- without gauge plates.