Began to display strange mix of numbers and letters after a very short time (just after time allowed to return it to Amazon). I had only used it less than a dozen times. Mostly letters E, H and L mixed in with random numbers.I would not recommend getting this.

The original tach on my PM1127VF lathe died. I was skeptical about this one responding well at low RPM because it only has one pulse per revolution - but in fact it works really well and is very accurate (I checked it at several speeds with a hand-held tach.) Installation was very straight forward. Such a deal!

The device is easy to install and it came with instructions. You will need a suitable 12v power supply (I used an old network router's power supply) to provide 12v power to the device. I mounted the display in an aluminium enclosure to make it look neater and to protect the electronics.The device works well, however, it is a little slow to update its display especially when stopping the machine.Well worth fitting to a milling machine/lathe/pillar drill or similar.

Easy to install and works as described. The only thing is that in the direct sunlight it is hard to see the display but that would be the case on all digital tachometers. Easy way to tell which way your magnet goes is to put it on a disk on your hand drill and power up the tach, spin the drill and if you get a reading it is correct if not flip it over and try.

dietro al sensore HALL c'è anche un comodo LED che vi consentirà di calibrare le distanze tra magnete fornito e sensore. il led si accende quando capta e si spegne viceversa. il sensore hall richiede alimentazione e anche la scheda display. schema fornito un po' misero e caotico.

I used this to measure prop RPM on an experimental aircraft that users a 2.17:1 reduction gear unit. This results in a higher engine RPM that ordinary pilots are not accustomed to, so this display gives them a more familiar range of speeds.The prop already had an imbedded RE magnet used for the constant-speed governor and this detected it easily and was simple to mount.Note that the South Pole of the magnet MUST be facing out on order for this to detect it. I got lucky on that one with my pre-existing magnet.I tested this first by putting the magnet onto the chuck of my metal lathe and it worked so well, that I will order another one to install on it as part of the DRO upgrade to my lathe.

Installed it on my Powermatic 3520a wood lathe that doesn’t have a tachometer like later versions. The instructions were very clear. There are also some good tips for installation in previous reviews like using a ‘wall wart’ for power (I used an old 12VDC one). Suggest you test out the magnet’s position before you fasten it down and mark it with a marker so you don’t make a mistake.

Top sehr gute Waremacht was es soll, für meine Maschine einfach Topgerne wieder

Tachymetre pour un tour de haute précision, le capteur magnétique un peu encombrant pour ma machine, problème résolu avec un support fixèrent sur le palier avant de la broche.Alimentation régulée de 12volts. +12volts fil rouge, 0 volts fil noir pour l'afficheur, fil bleu pour le capteur.NPN ( capteur) fil jaune avec fil noir du capteurTest de 20tms à 2200tms, marge d'erreur mois de 5/100.Bon rapport qualité/ pris'

Neat little gadget. I have bought a couple of them. Put one on my drill press and I love it. Modified the drill press to be variable speed (DC Motor with controller) and it is essential to good operation.

Easy installation with a very clear wiring diagram. Very good customer service from Digiten. I really don’t understand these 1 star reviews. It is a simple instrument. If it does not work, in some cases more than one does not work, I can only attribute it to an improper installation.

Originally posted this on the RED unit, probably won't get a "confirmed purchase" tag on it. The blue one is the one I purchased. For some reason the pics arn't showing on the other post??Saw a lot of questions on this tach so I thought I would review it and hopefully answer some of the many questions but before I get too far along remember the old adage "You get what you pay for" most of the time. This is a very inexpensive device, something you could pay several $100 for if it were a laboratory grade piece of electronics so keep that in mind if you buy one.The Review:I needed an RPM meter for a grinder I am building on the CHEAP. It will be a 2x72 belt grinder made mainly from a couple of used treadmills. I am using the treadmill motor to drive the belt and needed to know the speed of the belt so I figured a tach on the motor shaft would give me a good idea of belt speed. Bought this inexpensive kit and am very well pleased with it. If it had had some wiring instructions(pic attached) I would have given it 5 stars. I deducted a star for having to figure it out myself. I am powering it with a 9VDC AC-DC converter that plugs into a wall receptacle, one of the little devices that power our calculators and laptops, charge our phones etc. They are commonly referred to as "WALL WARTS". I have about 20 of the things thrown in a box form over the years. This one is "rated" at 9VDC at 210ma(mili amps). Some of the pics show it hooked up to two meters and the tach kit. If you look at the meters closely you will see that the digital is reading 11.87VDC, the no-load voltage for this WW(wall-wart) is 13.2DC by my measurement. Electronics folks will understand this but for the non-electronics folks, when the power supply is loaded the voltage drops, per the rating data if it had a 210ma load it would drop to 9VDC. That brings me to the actual load, note the old analog meter, it is set on the 60mili amp scale and is reading about half scale or about 30mili amps. That means that the tach kit is only loading the WW to ~30ma there by only dropping the output voltage to the 11.87VDC Based on this the minimum rated WW could be as low as 9VDC at 50ma, a very small WW indeed. The take away here is that most any 6-9VDC WW would do the job. I am saying 6-9 and not 8-15 because of the low loading effect the tack has on the WW power supply. I say start with 6 because I have four 6VDC WWs and all of them show a no-load voltage of 8VDC or more. One of my 12VDC WWs has a no load voltage of 17.8VDC. You would not want to apply that much voltage to this unit. Check out the pics for answers to other questions such as how to wire it up.Finally I highly recommend this and the similar other color tachs for non-critical applications. Great inexpensive hobby stuff.Edit: For some reason all the pics arn't showing for this post although I see the thumbnails in this editing session. They are however showing in the the nearly identical post for the RED version of this tach. Check it out if you donot see the wiring diagram in this post.

Bought one unit to monitor the speed on my aging CNC DC spindle drive .Worked very well , checked accuracy with a hand held tach , the unit is veryaccurate , in forward or reverse . It takes about second to return to "0" whenstopped . I powered it with a 9 volt battery . I bought a second unit fora second CNC and powered it thru the machine . Like the first one works excellent ..I used a larger magnet ,than came with it , because I needed a bolt on mount .