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Your cart is empty. Power requirement:DC 8-15V
Measure range : 5-9999RPM.
Clear zero: Automatic.
Clear zero time:about 10s.the greater the RPM value,the longer the clear zero time.
Refresh frequency: 0.2-0.5S@120-1200RPM;0.25-0.06S@2400-9999RPM.
Display:RED 0.56 inch LED
Sign:Pusle signal,Hall NPN 3 wires normally open.
Hall proximity model:NJK-5002C
Appearance:M12mm cylinder.
Detection range: 10mm
Proximity output current: 200mA
Detected objects: magnet
Response frequency: 100HZ
Tachometer dimension:72x36x20mm,panel cutout Dimension:68x33mm.
Sensor dimention: M12x10x55mm.
Sensor wiring:brown-Power+;blue-Power-;black-signal.
Operating temperature: 0 to 50℃.
Packaging include
Tachometer x 1
Hall NPN proximity sensor x 1
Utah Tank & Trailer
Reviewed in the United States on September 9, 2024
We have installed more than 10 of these on Fuel/Oil delivery trucks. These are mainly expensive new delivery trucks and we must stand behind them - so far no problems at all. We have supplied our own rectangular magnets to fit our purpose better: 1/8" x 1/4" x 1/2" that we install in an existing keyway, or we mill a 1/4" keyway into an accessible part, then epoxy in place. The sensor is installed in an existing part by drilling and tapping a 12mm x 1.0 thread (tap purchased from McMaster-Carr), or we fabricate a bracket and use the double nut method. The magnet must have North & South on the big flat side, and South must be out. We buy the magnets from K&J Magnetics (Part# B842), and they have a nice little iPhone and Android app available for identifying North and South. If the app gets confused, the magnet is probably not "pole"ed correctly. The wiring colors make it less than perfect for hooking it up, but the diagram included is correct. The tach reads 1 to 1: 1 magnet sensed = 1 full turn. No setup or programming required.
James H
Reviewed in the United States on December 10, 2024
Installed this on my knee mill. I now can see the exact spindle speed. It was super easy to install and wire.
j Bark
Reviewed in the United States on November 13, 2024
Poor accuracy on the rpm reading. The display varies by 150-200 rpm when the spindle is at constant speed. Same result from 100 to 1500 rpm. Clearly the sensor is not sensing properly. I have adjusted the gap in and out with the same result . I installed a stronger magnet, same result. Not worth the effort to un-install it and return it. The power supply is outputting 11 volts.
Mr.Fixit
Reviewed in the United Kingdom on September 13, 2023
Bought to monitor the speed of my old Myford lathe. Easy to wire up but ideally needs to be built into a box to protect the electronics and connections.You also need an external low voltage main’s adapter to power it, and it’ll work with any 8-15v DC supply ( I used a spare 12v one )The transmitter unit has a decent amount of thread on it to adjust the distance to the magnet which is fixed to the moving part.
hmwh1357
Reviewed in Japan on April 30, 2023
ネオジュウム磁石は高速の回転体に取付けるので固定用のビス穴があるほうがいいですね！私は別途センター穴の開いた磁石を別途調達しました。追伸：動作確認したところ表示器の数字が0のままで確認したところ写真の雲マークの4本足の素子が半田不良で外れてました。半田をやり直すと無事表示しました。
D. Etchells
Reviewed in the United States on August 25, 2022
I wanted a direct readout of spindle speed on my metal lathe, and this little gauge/sensor fit the bill perfectly. It uses a magnetic sensor to detect a magnet attached to the shaft spinning past it. You need to tape, glue or otherwise affix the small disc magnet to the shaft you're monitoring, so make sure you attach it securely if your machine will be spinning at high RPMs. (It claims to measure speeds up to 9,999 rpm; I'd be a little nervous about the magnet flying off under those conditions. I don't know if you could use a stainless steel (non-magnetic) strap to attach it and still have the sensor "see" the magnet, but it wasn't a concern for my usage. Just a heads-up to others who might need to use it in a higher-rpm range. (Probably better to use a reflective vs magnetic sensor for high shaft speeds...)
Paul S.
Reviewed in Canada on December 5, 2022
Worked great after I moved the sensor far enough from the magnet, like the directions say.
BRW
Reviewed in the United States on April 30, 2022
I installed this tach inside the spindle gearbox of my lathe in 2017. It runs in oil, vibration, heat and general misery all the time. It was a simple install and very cost effective to try out, I didn't expect it to last very long. It is the end of April 2022 and this tach has never skipped a beat. Probably the best money I have ever spent for an electronic upgrade. I would recommend this product 100% of the time. It has been proven under the most severe conditions.
GY
Reviewed in the United States on July 26, 2019
Used this for a one cylinder engine because it is difficult and expensive to find a good tach for a one cylinder. I have tried those inductive mini tachs that use a wire to wrap around the spark plug wire. They are not reliable and not worth installing. This works great. I installed on the end of the crank with a bolt and couple of washers. Grind a slot in the washers for the magnet and use a little epoxy extra security once you know you have the magnet installed with the correct side facing the pickup. I did have to fabricate a bracket to hold the pickup sensor ( not a big deal). It actually reads the rpm changes faster and more accurately than those little mini tachs. I am going to install another one on my other tractor this fall.
Graf Seismo
Reviewed in Germany on September 23, 2017
Einfacher Drehzahlmesser mit Hall-abnehmer. Der Magnet muss mit Zwei-Komponenten-Kleber oder mechanisch fixiert werden da er sonst bei höheren Drehzahlen >1500 U/min vom Rotator fliegt. Daher nicht gut für gewuchtete Rotatoren geeignet die mit hoher Drehzahl arbeiten. Der Magnet ist zwar leicht, mit Fixierung bringt er aber trotzdem eine neue Unwucht. Eine Berührungslose Reflexionslichtschranke als Geber wäre schöner.Die Drehzahlmessung wird im Sekundentakt aktualisiert und reicht für eine grobe Messung vollkommen aus. Das Kabel vom Sensor könnte etwas länger sein, ebenso vom Anschlusskabel. Einsatz bei mir an der Spindel einer Mini Fräsmaschine. Der Sensor verfügt über eine helle rötliche LED die konstant leuchtet und kurz flackert wenn der Magnet am Sensor vorbei kommt. Tut es das nicht, ist der Magnet falsch herum montiert. Dieser Hinweis fehlt leider in der sehr kurzen Dokumentation.
charles w.
Reviewed in the United States on May 25, 2017
I've been using this on my Smithy CB-1220 XL for about three months now, and am very pleased with it's performance. It certainly beats checking the belts to see how fast I'm going. The meter is designed to snap into a rectangular opening for an almost flush mount, but I didn't have enough clearance inside the gear box, so I whipped up a little case out of an old aluminum license plate. The circuit board is exposed from the back, anyway, and it probably would end up getting splattered with oil and chips if I had mounted it directly. I added a power switch on top, and used a surplus wall wart to supply it with 12 v. The magnet must pass very close to the sensor, and the only spot available was the face of the spindle pulley, so I mounted the sensor on a bracket that can easily be swung out of the way when I need to change a belt. I used epoxy to attach the magnet. The instructions were brief but to the point. I am considering getting another unit for my Shopsmith, if I can figure out where to put the sensor. A very good item!
SANDRO
Reviewed in Italy on December 6, 2017
Mi serviva un contagiri economico per il trapano a colonna, il prodotto è molto buono e funziona a meraviglia. Io ho comprato anche un alimentatore 12 v DC per Led per farlo funzionare con corrente di rete. Lo consiglio
Tim D. Buckley
Reviewed in the United States on March 7, 2016
I bought this for my Logan lathe. It works fine and everything was as advertised. The wiring diagram was correct and easy to follow. The unit requires 9-15 volts DC but it does not mention how much current the power supply has to supply. I first used a 9V battery with clip leads and it worked fine with the provided magnet. However with a 15V 200mA power supply, the magnet wasn't strong enough. So I ended up using a 9V 300mA power supply and it works fine. I just had to mount the magnet very close to the sensor. I used an ABS plastic sleeve with a counterbore and glued the magnet in. Then glued the sleeve to the spindle on my lathe. I was going to zip tie it on, but the zip tie interfered with the sensor.
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