Manufacturer | DIGITEN |
---|---|
Brand | DIGITEN |
Item Weight | 2.47 ounces |
Product Dimensions | 2.8 x 0.8 x 1.4 inches |
Item model number | 5823950920 |
Is Discontinued By Manufacturer | No |
Manufacturer Part Number | RPM1204GHA |
Voltage | 12 Volts |
DIGITEN 4 Digital Green LED Tachometer RPM Speed Meter + Hall Proximity Switch Magnet Sensor NPN for Lathe Conveyor Belt
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Return this item for free
Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition: no shipping charges
Learn more about free returns.- Go to your orders and start the return
- Select the return method
- Ship it!
Purchase options and add-ons
- Measure range: 5-9999RPM.
- Power requirement:DC 8-15V
- Come with hall sensor and magnet
- Display: Green 0.56" LED
- Application: Lathe, CNC, Mower, Spring, etc.Measure varied motor RPM.
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Product Description
Specification
Power requirement: DC 8-15V
Measure range : 5-9999RPM.
Clear zero: Automatic.
Clear zero time: about 10s. The greater RPM value, the longer clear zero time.
Refresh frequency: 0.2-0.5S@120-1200RPM;0.25-0.06S@2400-9999RPM.
Measure accuracy: RPM<5000,±2;RPM>5000,±3.
Display: Green 0.56 inch LED
Sign: Pusle signal,Hall NPN 3 wires normally closed.
Hall proximity model: NJK-5002D
Appearance: M12mm cylinder.
Detection range: 2-3mm
Proximity output current: 200mA
Detected objects: magnet
Response frequency: 100HZ
Tachometer dimension:72x36x20mm,panel cutout Dimension:68x33mm.
Sensor dimention: M12x37mm.
Sensor wiring: brown--Power+; blue--Power-; black--signal.
Operating temperature: 0 to 50°C.
Package includes
Tachometer x 1
Hall NPN proximity sensor x 1
Magnet x 1
Tips:
1.Please confirm that all the wires are connected correctly.
2. The direction of the magnet must be correct. If it is not correct, please flip the magnet.
3.The distance between the magnet and the sensor must be kept at 2-3mm (0.07"-0.12").
If you have any other questions, please feel free to contact us by email, we will definitely solve the problem for you.
Product information
Technical Details
Additional Information
ASIN | B01FQMI18Y |
---|---|
Customer Reviews |
4.2 out of 5 stars |
Best Sellers Rank | #24,910 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #6 in Industrial Tachometers |
Date First Available | May 16, 2016 |
Warranty & Support
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Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers like the performance, ease of installation, quality and value of the tachometer. They mention that it works well, the instructions are easy to follow and that it's well made. They appreciate the rpm, saying that it is accurate and uniform over the speed range.
AI-generated from the text of customer reviews
Customers like the performance of the auto accessory. They say it works well, is easy to use, and has a green display that works well in any light. Some mention that the brackets required were well worth the effort. Overall, most are satisfied with the performance and functionality of the product.
"Works better than expected...." Read more
"Got this to add to my wood lathe, works great!..." Read more
"Very good, works as expected. Easy installation" Read more
"this item worked well when it worked....i found i had to get a bigger heavier neodymium magnet so that the sensor could be mounted an extra 1/4 inch..." Read more
Customers find the installation of the auto accessory to be simple. They mention that the instructions are super easy to follow, and the wiring diagram is simple. Some say that the product is easy to set up and works well for their application. Overall, most are satisfied with the ease of installation.
"...Pretty neat setup, works well...." Read more
"The tachometer is well made and easy to install in the machine that I am building. Great value for the price." Read more
"...I bought that at Dollar Tree for you guessed it, a dollar. The wiring diagram is simple and I used tiny wire nuts I may later solder the connections..." Read more
"Very good, works as expected. Easy installation" Read more
Customers like the quality of the auto accessory. They say it's well made, accurate, and reliable. Some mention that the magnet is pretty strong and stays where they put it. Overall, most are satisfied with the quality and functionality of the product.
"The tachometer is well made and easy to install in the machine that I am building. Great value for the price." Read more
"...In summary, this is a well made and nicely constructed tachometer for the price!" Read more
"Very good, works as expected. Easy installation" Read more
"...Oddly it is a different component on each. Just total junk...." Read more
Customers are satisfied with the value of the auto accessory. They mention it's a great product for the price, easy to use, and high quality. Some say that it'll be a good buy.
"...Great value for the price." Read more
"...In summary, this is a well made and nicely constructed tachometer for the price!" Read more
"...Great value!" Read more
"...Very pleased. Good deal for the money and was a fun little project for my mill!" Read more
Customers like the rpm. They say it's better than guessing speeds, accurate, and uniform over speed range. They also say it adds a speed display to your equipment, and works perfectly. Customers also mention that it updates quickly when running.
"...tested the accuracy and as far as I can tell is accurate and uniform over speed range...." Read more
"...Accuracy appears to be excellent; no fluctuations when the speed is set I couldn't be happier with this tach. Great value!" Read more
"...for some reason it worked and was very accurate but now it decided to read double the rpm it seems?..." Read more
"...Works perfectly and updates quickly when running, but not so quickly that you get a blur of changing numbers on the readout—maybe a little quicker..." Read more
Customers like the accuracy of the auto accessory. They mention it's pretty basic, but accurate and visible.
"...Oh, forgot to say I tested the accuracy and as far as I can tell is accurate and uniform over speed range...." Read more
"...Directions were as clear as could be. Accuracy appears to be excellent; no fluctuations when the speed is set I couldn't be happier with this tach...." Read more
"...this installed on a small engine for some reason it worked and was very accurate but now it decided to read double the rpm it seems?..." Read more
"...It seems accurate based on an online calculator with RPM and pulley size inputs. If this one ever goes belly up, I'd buy it again." Read more
Customers are dissatisfied with the display of the auto accessory. They say that it goes out, shows zero, and quits displaying all together. Some customers also mention that the display has a couple dead segments.
"...While driving tractor it stated working. Next day same thing, no display (it normally would display a 0 before starting engine then giving rpms)...." Read more
"...Fist display had a couple dead segments. Vender was quixk to respond and sent a new display. Works great." Read more
"...stopped working first by giving eroniuse readings then just quit displaying all together." Read more
"the tachometer worked halfway through the first cut then the screen went blank and never came back on so as long as I don't touch my throttle I..." Read more
Customers are dissatisfied with the magnet included with the auto accessory. They mention that it works well, but the included magnet did not work for them. The magnets are unmarked, so it's up to you to do the testing. Some customers also mention that the only thing they found a problem with was mounting the trigger magnet, which is likely due to the very close spacing of sensor to magnet.
"...This is likely due to the very close spacing of sensor to magnet in my particular case.I will purchase again for additional builds!" Read more
"...I did have a durr moment tho. The magnet will only produce a signal for the display from one side of the magnet...." Read more
"...Works well other than as several users commented, the magnet won't hold at high rpm (around 600 on our application)...." Read more
"It works well, but the included magnet did not work for me, and I made the distance between sensor and magnet as tight as possible...." Read more
Reviews with images
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Top reviews
Top reviews from the United States
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Hopefully it keeps working long term, only time will tell.
Reviewed in the United States on February 8, 2024
Hopefully it keeps working long term, only time will tell.
Pretty neat setup, works well. I haven't tested the accuracy of the display because it isn't critical, it's just very handy to have a visual indication of spindle RPM's when woodturning.
I'm very pleased with the result.
Reviewed in the United States on October 10, 2022
Pretty neat setup, works well. I haven't tested the accuracy of the display because it isn't critical, it's just very handy to have a visual indication of spindle RPM's when woodturning.
I'm very pleased with the result.
When power to the sensor is ON and no magnet is present, the sensor will output 0VDC as shown in the picture. The red LED on the bottom of the sensor will also be illuminated. When the magnetic SOUTH pole of the magnet approaches the sensor (in my test, about a quarter inch), the red LED will turn off and the output of the sensor will switch to a positive DC voltage. In my test, this voltage is proportional to the supplied DC input voltage to the sensor minus approximately 560mV (Vout_sensor = Vdc_sensor - .560).
The rise time of the sensor, or the time it takes for the output of the sensor to rise from 10 percent to 90 percent of its steady value (Vout_sensor), is 114uS. This is with a 9VDC regulated DC power supply into the sensor. Please see the attached photo for additional details. The fall time (no photo attached), is much faster with a time of 160nS.
During the wiring portion of the assembly, it's important to note the colorings of the wires at the display and at the sensor.
The sensor color codes are as follows:
Brown: +DC supply voltage
Blue: GND
Black: Sensor Output Voltage (I called this Vout_sensor in my discussion above)
The tachometer display color codes are as follows:
Red: +DC supply voltage
Black: GND
Yellow: Sensor Input Voltage (Connect this lead to the Black lead of the sensor wiring)
As mentioned by Digiten, the DC supply voltage must fall into the range of 8VDC to 15VDC (Do NOT use an AC-output power supply). As an engineer, this implies that any supply voltage below or above this range can cause unexpected operation or failure of the product. My recommendation is to use a walwart-style (plug in) regulated DC power supply with an output voltage of either 9VDC or 12VDC. When connecting the power supply to the tachometer, make certain that the output polarity of the power supply correlates to the input polarity of the tachometer.
When mounting your display, I would recommend measuring the actual dimensions of your display first as mine were slightly different from the recommended cutout dimensions shown on the product page. The cutout portion of my display (the area behind the front mounting flange) measured 33.33mm by 68.26mm. The panel cutout dimension on the page has this listed at: 68x33mm. Those extra thousandths of an inch could make mounting the display a challenge depending on the supporting material.
In my next review, I will compare the RPM values from this tachometer to the RPM values calculated from a high-end encoder and RPM measuring device :) In summary, this is a well made and nicely constructed tachometer for the price!
When power to the sensor is ON and no magnet is present, the sensor will output 0VDC as shown in the picture. The red LED on the bottom of the sensor will also be illuminated. When the magnetic SOUTH pole of the magnet approaches the sensor (in my test, about a quarter inch), the red LED will turn off and the output of the sensor will switch to a positive DC voltage. In my test, this voltage is proportional to the supplied DC input voltage to the sensor minus approximately 560mV (Vout_sensor = Vdc_sensor - .560).
The rise time of the sensor, or the time it takes for the output of the sensor to rise from 10 percent to 90 percent of its steady value (Vout_sensor), is 114uS. This is with a 9VDC regulated DC power supply into the sensor. Please see the attached photo for additional details. The fall time (no photo attached), is much faster with a time of 160nS.
During the wiring portion of the assembly, it's important to note the colorings of the wires at the display and at the sensor.
The sensor color codes are as follows:
Brown: +DC supply voltage
Blue: GND
Black: Sensor Output Voltage (I called this Vout_sensor in my discussion above)
The tachometer display color codes are as follows:
Red: +DC supply voltage
Black: GND
Yellow: Sensor Input Voltage (Connect this lead to the Black lead of the sensor wiring)
As mentioned by Digiten, the DC supply voltage must fall into the range of 8VDC to 15VDC (Do NOT use an AC-output power supply). As an engineer, this implies that any supply voltage below or above this range can cause unexpected operation or failure of the product. My recommendation is to use a walwart-style (plug in) regulated DC power supply with an output voltage of either 9VDC or 12VDC. When connecting the power supply to the tachometer, make certain that the output polarity of the power supply correlates to the input polarity of the tachometer.
When mounting your display, I would recommend measuring the actual dimensions of your display first as mine were slightly different from the recommended cutout dimensions shown on the product page. The cutout portion of my display (the area behind the front mounting flange) measured 33.33mm by 68.26mm. The panel cutout dimension on the page has this listed at: 68x33mm. Those extra thousandths of an inch could make mounting the display a challenge depending on the supporting material.
In my next review, I will compare the RPM values from this tachometer to the RPM values calculated from a high-end encoder and RPM measuring device :) In summary, this is a well made and nicely constructed tachometer for the price!
I Will change to 4 stars because I found the problem. I had it mounted upside down and the screen showed a mixture of numbers and letters. Be sure to mount it so the zero is on the right side. I knocked off one star because Digiten should mention that ih the instructions. It would have saved me a lot of time if I had been advised of that. Works great now.
Top reviews from other countries
occorre fare attenzione ai collegamenti del sensore di hall perché se alimentato al contrario si brucia.
Il magnete in dotazione non è particolarmente potente, volendo una distanza di misura di 5 o 6 millimetri
ho usato al suo posto un N50 rettangolare 10x5 mm. Attenzione al fissaggio perché un magnetino da un grammo
se messo in rotazione a 10000 giri produce una forza centrifuga di diverse centinaia di grammi e schizza via e può far male.
Reviewed in Italy on January 5, 2019
occorre fare attenzione ai collegamenti del sensore di hall perché se alimentato al contrario si brucia.
Il magnete in dotazione non è particolarmente potente, volendo una distanza di misura di 5 o 6 millimetri
ho usato al suo posto un N50 rettangolare 10x5 mm. Attenzione al fissaggio perché un magnetino da un grammo
se messo in rotazione a 10000 giri produce una forza centrifuga di diverse centinaia di grammi e schizza via e può far male.
Ich wollte keine 4 Wochen warten, deswegen die deutsche Bestellung, 4 Tage sind OK, dafür gebe ich gerne etwas mehr aus.
I’m so pleased with this that I’ve just ordered another one as a spare! Recommended.
Ps...as others have said, you need to get the magnet the right way up or it won’t work!
Reviewed in the United Kingdom on December 18, 2018
I’m so pleased with this that I’ve just ordered another one as a spare! Recommended.
Ps...as others have said, you need to get the magnet the right way up or it won’t work!