---
product_id: 18058321
title: "DIGITEN 4 Digital Red LED Tachometer RPM Speed Meter + Hall Proximity Switch Magnet Sensor NPN for Lathe Conveyor Belt"
brand: "digiten"
price: "$42.57"
currency: USD
in_stock: true
reviews_count: 13
category: "Digiten"
url: https://www.desertcart.us/products/18058321-digiten-4-digital-red-led-tachometer-rpm-speed-meter-hall
store_origin: US
region: United States of America
---

# DC 8-15V power range RPM range 5-9999 0.56" bright red LED display DIGITEN 4 Digital Red LED Tachometer RPM Speed Meter + Hall Proximity Switch Magnet Sensor NPN for Lathe Conveyor Belt

**Brand:** digiten
**Price:** $42.57
**Availability:** ✅ In Stock

## Summary

> 🔴 Spin smarter, not harder — master your RPM game with DIGITEN!

## Quick Answers

- **What is this?** DIGITEN 4 Digital Red LED Tachometer RPM Speed Meter + Hall Proximity Switch Magnet Sensor NPN for Lathe Conveyor Belt by digiten
- **How much does it cost?** $42.57 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/18058321-digiten-4-digital-red-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

- • **Vivid LED Display:** Clear, bright 0.56" red LED ensures real-time RPM visibility even in low light.
- • **Compact & Versatile:** Slim 72x36x20mm tachometer fits seamlessly into industrial or workshop setups.
- • **Plug & Play Simplicity:** No programming needed—just install the sensor and magnet, and start monitoring instantly.
- • **Precision RPM Tracking:** Accurately measures motor speeds from 5 to 9,999 RPM for ultimate control.
- • **Robust Hall Sensor Tech:** Reliable NPN Hall proximity sensor with 10mm detection range for consistent pulse signals.

## Overview

The DIGITEN 4 Digital Red LED Tachometer is a compact, easy-to-install RPM speed meter featuring a bright 0.56" red LED display and a Hall NPN proximity sensor. It operates on DC 8-15V power and accurately measures rotational speeds from 5 to 9,999 RPM. Designed for industrial and workshop use, it offers plug-and-play setup with no programming required, making it ideal for lathe machines, conveyor belts, and motor monitoring.

## Description

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

Review: Works Perfectly and Very Inexpensively - 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.
Review: Cheap, seems accurate and works well - 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...)

## Features

- Measure range: 5-9999RPM.
- Power requirement:DC 8-15V
- Come with hall sensor and magnet
- Display:red 0.56" LED
- Measure varied motor RPM

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00VKAT8A2 |
| Best Sellers Rank | #105,506 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #25 in Industrial Tachometers |
| Brand | DIGITEN |
| Date First Available | April 2, 2015 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 2.12 ounces |
| Item dimensions L x W x H | 2.8 x 1.4 x 0.8 inches |
| Item model number | 5864173439 |
| Manufacturer | DIGITEN |
| Material | Plastic |
| Product Dimensions | 2.8 x 1.4 x 0.8 inches |
| UPC | 785497558080 713458679192 |
| Voltage | 12 Volts |

## Product Details

- **Brand:** DIGITEN
- **Item Weight:** 2.12 Ounces
- **Item dimensions L x W x H:** 2.8 x 1.4 x 0.8 inches
- **Material:** Plastic
- **Voltage:** 12 Volts

## Images

![DIGITEN 4 Digital Red LED Tachometer RPM Speed Meter + Hall Proximity Switch Magnet Sensor NPN for Lathe Conveyor Belt - Image 1](https://m.media-amazon.com/images/I/71dZmGyzgLL.jpg)

## Questions & Answers

**Q: Can you recommend a 110v power supply for the tach here from Amazon?**
A: I save old wall warts, those plug-in AC adapters that you plug in the wall, and then into your device, and I found one of them that supplied the recommended voltage, cut off the device plug and connected it to the tachometer power wires.

**Q: Will this work on lawnmowers?**
A: If you can install the magnet and sensor in lawnmower. i think it can work with it. thank you@

**Q: Is there a way to output the tach signal to a data acquisition system that reads in voltage?**
A: This hall sensor acts as a NO switch. Meaning that voltage/current are allowed to pass only when the magnet is near the sensor. For use as a tachometer, you would be reading pulses/second, or frequency. So data logging voltage wouldn't really work unless you worked some excel magic afterwards.

**Q: what is the maximum length of the sensor wire? 44 inches is too short for my need.  Can I lengthen it?**
A: I installed this on my combine to measure the fan RPM speed. I needed to add more wire to reach the display mounted inside the cab. The total length of the wire is over 15 feet. I believe it would work at even a greater length.
The unit works great.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works Perfectly and Very Inexpensively
*by U***R 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.

### ⭐⭐⭐⭐⭐ Cheap, seems accurate and works well
*by D***S 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...)

### ⭐⭐⭐⭐ It works fine and everything was as advertised
*by T***Y 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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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-02-20*