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4-Digit LED Tachometer with Hall NPN Sensor

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Multi Brand Proximity Sensor and Modules for everyday users

The 4-Digit LED Tachometer with Hall NPN Sensor is a value-for-money multi brand proximity sensor and modules designed for everyday users. It features Operating Voltage (VDC): 8 to 24 and DC Current(mA): 30.

₹1,464
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Total: ₹1,464
Buying tip: A well-rounded choice at a fair price. Recommended for most buyers.
Estimated delivery: 17 Aug31 Aug
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Quick Specs

Operating Voltage (VDC): 8 to 24
DC Current(mA): 30
Additional Specs.: Counting range: 0-9999
Measurement Range: 10-9999RPM
Input Voltage (V): low level: -30V-0.6V high level:4-30V
Switching frequency: 320 KHZ (Hall NPN sensor)

Ideal For

Electronics projectsArduino / Raspberry Pi buildsPrototyping
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About This Product

The 4-Digit LED Tachometer with Hall NPN Sensor is a value-for-money multi brand proximity sensor and modules designed for everyday users. It delivers reliable performance at an accessible price.

Key Specifications

  • Operating Voltage (VDC): 8 to 24 — works with standard household power
  • DC Current(mA): 30
  • Additional Specs.: Counting range: 0-9999 — reliable connection even at a distance
  • Measurement Range: 10-9999RPM — reliable connection even at a distance
  • Input Voltage (V): low level: -30V-0.6V high level:4-30V — works with standard household power
  • Switching frequency: 320 KHZ (Hall NPN sensor) — smooth, flicker-free operation
  • Supply Voltage: 5-24VDC,6-36VDC Hall NPN sensor — works with standard household power
  • Color: Blue, Green, Red (Optional)

Why Buy from Pricio?

Pricio sources this product directly, cutting out multiple middlemen. Every order includes free shipping, a 15-day return policy, and secure payment via Razorpay.

This digital display counter has a bright LED light, high accuracy, good stability, and easy installation. The meter remains the number automatically when power off. It has The working power supply of  AC/DC 8-24V, 40mA. The product has good stability, strong anti-interference, and is ability suitable for display of various digital instruments.

Application: Lathe, CNC, Mower, Spring, etc. Measure varied motor RPM.


Connection Diagram:


Features:
  1. 4 digit bright LED light, clear to read.
  2. Good stability, high accuracy, and easy installation.
  3. Counting value will be retained when power failure.
  4. Wide application to automation equipment and test equipment, etc.
  5. Compact size, beautiful appearance, and Blue, Green, Red, three color for you to choose.

Hall NPN sensor:

  1. Appearance: M12mm cylinder
  2. Output: NPN three wire normally open type
  3. The detection distance: 10 mm
  4. Supply voltage: 8-24VDC,6-36VDC
  5. Output current: 200 mA
  6. Objects can be detected: permanent magnets
  7. Switching frequency: 320 KHZ
  8. Wiring:brown-Power+,blue-Power-,black-signal

Package Includes:

1 x 4 Digital red measurement indicators tachometer 1 x Hall NPN proximity sensor

Setup Guide

1
Identify the pins
Locate VCC (power), GND (ground), and data pins (SDA/SCL for I2C, MOSI/MISO for SPI, or TX/RX for UART). Refer to the pinout diagram on the product page.
2
Wire to your microcontroller
Connect VCC to 3.3V or 5V (check the module spec), GND to GND, and data pins to the appropriate GPIO pins on your Arduino or Raspberry Pi.
3
Install libraries
In Arduino IDE, go to Sketch → Include Library → Manage Libraries and search for the sensor library. Install the recommended version.
4
Upload example sketch
Open File → Examples → [library name] → Basic Example. Upload to your board and open Serial Monitor to view output.
5
Calibrate if needed
Some sensors (temperature, humidity, distance) may need a short warm-up period or calibration. Run the calibration sketch if provided.