--- product_id: 28592239 title: "DIGITEN 4 Digital Green LED Tachometer RPM Speed Meter + Hall Proximity Switch Magnet Sensor NPN for Lathe Conveyor Belt" brand: "digiten" price: "26029CFA" currency: XOF in_stock: true reviews_count: 13 category: "Digiten" url: https://www.desertcart.sn/products/28592239-digiten-4-digital-green-led-tachometer-rpm-speed-meter-hall store_origin: SN region: Senegal --- # DC 8-15V power range 0.56" bright green LED display 5-9999 RPM measurement range DIGITEN 4 Digital Green LED Tachometer RPM Speed Meter + Hall Proximity Switch Magnet Sensor NPN for Lathe Conveyor Belt **Brand:** digiten **Price:** 26029CFA **Availability:** βœ… In Stock ## Summary > πŸš€ Measure your machine’s pulse with pinpoint precision! ## Quick Answers - **What is this?** DIGITEN 4 Digital Green LED Tachometer RPM Speed Meter + Hall Proximity Switch Magnet Sensor NPN for Lathe Conveyor Belt by digiten - **How much does it cost?** 26029CFA with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/28592239-digiten-4-digital-green-led-tachometer-rpm-speed-meter-hall) ## Best For - digiten enthusiasts ## Why This Product - Trusted digiten brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Dynamic Display:** Clear green LED readout refreshes up to 16 times per second - β€’ **Plug & Play Setup:** Includes Hall sensor + magnet for quick, hassle-free installation - β€’ **Precision RPM Tracking:** Accurate Β±2-3% RPM readings for flawless motor monitoring - β€’ **Universal Compatibility:** Works seamlessly with lathes, CNC machines, conveyors & more - β€’ **Flexible Sensing Options:** Supports Hall NPN sensor or IR sensor input for versatile RPM detection ## Overview The DIGITEN 4 Digital Green LED Tachometer offers a wide RPM measurement range from 5 to 9999, powered by a reliable DC 8-15V source. Featuring a bright 0.56-inch green LED display and an included Hall proximity sensor with magnet, it delivers accurate RPM readings (Β±2-3%) ideal for lathes, CNC machines, conveyors, and more. Its compact design and fast refresh rate ensure real-time speed monitoring, while flexible sensor compatibility allows for easy integration and setup. ## 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: RPM5000,Β±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 50Β°C. Package includes Tachometer x 1 Hall NPN proximity sensor x 1 Magnet x 1Tips： 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. Review: Nice module. inexpensive, easy to mount (snap in). - I bought this to show my lathe's speed. It worked well. A little problem mounting the magnet. Instructions say south pole. I used a magnetic navigational compass to determine north/south of the provided magnet. When I mounted south pole toward the sensor, it didn't work. Turned it around and it did. I epoxied the magnet so unmounting was a nuisance. Connection was simple, just be sure to follow instruction on wire colors. Ground yourself when handling electronics to keep static zero. Review: Happy With It - I'm using it on a metal lathe. It's worked fine for several years now. ## Features - 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. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01FQMI18Y | | Best Sellers Rank | #32,949 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #6 in Industrial Tachometers | | Brand | DIGITEN | | Brand Name | DIGITEN | | Customer Reviews | 4.4 out of 5 stars 710 Reviews | | Item Dimensions | 2.8 x 0.8 x 1.4 inches | | Item Weight | 3.5 Ounces | | Item dimensions L x W x H | 2.8 x 0.8 x 1.4 inches | | Manufacturer | DIGITEN | | Material | PLA_(Polylactic_Acid), PE_(Polyethylene) | | Material Type | PLA_(Polylactic_Acid), PE_(Polyethylene) | | Model | 5823950920 | | Part Number | RPM1204GHA | | Voltage | 12 Volts | ## Product Details - **Brand:** DIGITEN - **Item Weight:** 3.5 Ounces - **Item dimensions L x W x H:** 2.8 x 0.8 x 1.4 inches - **Material:** PLA_(Polylactic_Acid), PE_(Polyethylene) - **Voltage:** 12 Volts ## Images ![DIGITEN 4 Digital Green LED Tachometer RPM Speed Meter + Hall Proximity Switch Magnet Sensor NPN for Lathe Conveyor Belt - Image 1](https://m.media-amazon.com/images/I/71V-TVeOTXL.jpg) ![DIGITEN 4 Digital Green LED Tachometer RPM Speed Meter + Hall Proximity Switch Magnet Sensor NPN for Lathe Conveyor Belt - Image 2](https://m.media-amazon.com/images/I/81Sx1AMvabL.jpg) ![DIGITEN 4 Digital Green LED Tachometer RPM Speed Meter + Hall Proximity Switch Magnet Sensor NPN for Lathe Conveyor Belt - Image 3](https://m.media-amazon.com/images/I/61xcZkbSTVL.jpg) ![DIGITEN 4 Digital Green LED Tachometer RPM Speed Meter + Hall Proximity Switch Magnet Sensor NPN for Lathe Conveyor Belt - Image 4](https://m.media-amazon.com/images/I/61fmJyjSo8L.jpg) ![DIGITEN 4 Digital Green LED Tachometer RPM Speed Meter + Hall Proximity Switch Magnet Sensor NPN for Lathe Conveyor Belt - Image 5](https://m.media-amazon.com/images/I/81mpKeQvLXL.jpg) ## Available Options This product comes in different **Color** options. ## Questions & Answers **Q: can you run the wires for power directly to the power switch on my wood lathe?** A: Hello; The requirement for the 4-digit counter is a DC voltage between 8 and 15 VDC. Your switch, I presume, switches 120VAC to the lathe if you live in the U.S., and 240VAC if you live in Europe, England, or a few other countries. It would make for a nice fireworks display if you connected this device to a higher AC voltage. What I did was to buy a small 120VAC to 12VDC low current power supply, and it was about the size of a small box of matches, perhaps an inch (25mm) on the longest side. The power supply and display come on with the switch, and report on my lathe's RPM just nicely. I hope this helps, best of luck, Ken **Q: what is the thread pitch of the Hall sensor threads** A: 12 mm x 1 mm pitch. Kind of an oddball size. Hope this helps **Q: Can I use a 3/16" or 1/4" dia. magnet that is longer, so I can drill a hole in a pulley, so it can't fly off?** A: Your probably better off with a drop of 2 part epoxy or super glue. By drilling the pulley and replacing with a different density material you may change the balance and induce vibration. I just let the magnet hold it on my wood lathe shaft so far to 1200rpm. **Q: I have a vfd suppling power to a 3 phase motor, the vfd has a terminal with 10vdc output connection but only allows 10ma is that enough power to run** A: Enough power to light up a small LED but nothing else. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Nice module. inexpensive, easy to mount (snap in). *by D***E on November 19, 2024* I bought this to show my lathe's speed. It worked well. A little problem mounting the magnet. Instructions say south pole. I used a magnetic navigational compass to determine north/south of the provided magnet. When I mounted south pole toward the sensor, it didn't work. Turned it around and it did. I epoxied the magnet so unmounting was a nuisance. Connection was simple, just be sure to follow instruction on wire colors. Ground yourself when handling electronics to keep static zero. ### ⭐⭐⭐⭐⭐ Happy With It *by M***E on May 26, 2026* I'm using it on a metal lathe. It's worked fine for several years now. ### ⭐⭐⭐⭐⭐ Great Little Tachometer!! *by A***B on March 29, 2023* Hello All! I purchased this tachometer to provide RPM information on my drill press. After reading several reviews, I thought I would do some additional measurements of the sensor for others to use in their decision making and engineering efforts. As the sensor is a hall effect device, the magnetic polarity of the supplied magnet in relationship to the sensor DOES matter. It is essential that the SOUTH pole of the magnet face the sensor. In order to determine which side of the magnet is the south pole, I used a smart phone app provided by K&J Magnetics called KJ Pole ID (iPhone version). Simply open the app and point the top of the phone towards one face of the magnet. The app will display the magnetic polarity that is currently facing the phone. Arrange the magnet such that the app displays "The SOUTH pole of the magnet is facing the phone", then mark the face of the magnet for easy identification prior to mounting. 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! ## Frequently Bought Together - DIGITEN 4 Digital Green LED Tachometer RPM Speed Meter + Hall Proximity Switch Magnet Sensor NPN for Lathe Conveyor Belt - Digital LED Tachometer, Icstation RPM Speed Meter AC 110V 220V Digital Motor Tachometer with Hall Proximity Switch Sensor NPN for Lathes, Conveyor Belts, Quality Inspection Machines - PSI Woodworking TCLVSKIT2 Variable Speed Lathe Conversion Kit --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sn/products/28592239-digiten-4-digital-green-led-tachometer-rpm-speed-meter-hall](https://www.desertcart.sn/products/28592239-digiten-4-digital-green-led-tachometer-rpm-speed-meter-hall) --- *Product available on Desertcart Senegal* *Store origin: SN* *Last updated: 2026-06-01*