4 Digital LED Blue Green Tachometer Gauge RPM Speed Meter with Hall Proximity Switch Sensor | NPN 12V Accessories Set

Track the RPM of your engine, motor, or machinery with this compact digital tachometer gauge. It features a bright blue and green LED display and comes with a Hall effect proximity switch sensor for non-contact speed measurement.

This tachometer set is designed for easy installation and reliable performance. It provides accurate RPM readings with a measurement range from 5 to 9999 RPM. The included NPN Hall sensor connects directly to the gauge, making it a complete solution for monitoring rotational speed.

The display offers a clear readout with a refresh rate of three times per second. The housing has a standard size for panel mounting, and the sensor is compact for placement in tight spaces. This set includes everything you need to get started measuring RPM.

Whether you are tuning an engine, monitoring a conveyor belt, or checking the speed of a lathe, this tachometer set provides the data you need. It is a practical tool for automotive, industrial, and hobbyist applications.

Key Features and Benefits

- Measures from 5 to 9999 RPM that allows you to monitor a wide range of rotational speeds.

• Bright blue and green LED display that ensures easy reading in various lighting conditions.

• Includes a Hall proximity switch sensor that enables non-contact, simple installation.

• Compact tachometer and sensor dimensions that fit into standard panel cutouts and tight spaces.

• Strong anti-jamming capability that provides stable and reliable readings.

Who Is This For

- Automotive enthusiasts and mechanics who need to measure engine or driveshaft RPM.

• Hobbyists working on robotics, RC vehicles, or small engine projects.

• Industrial maintenance technicians monitoring the speed of conveyor belts, fans, or pumps.

• Anyone building a custom dashboard or control panel who needs a digital RPM display.

Usage Scenario

Mark was tuning a small go-kart engine and needed to see the RPM to set the carburetor correctly. He mounted the tachometer into a small panel on the frame and attached the Hall sensor near the flywheel. With the engine running, he could instantly see the RPM change as he adjusted the throttle, allowing him to find the optimal idle speed and peak performance range.

Micro Comparison

Unlike basic analog tachometers that can be hard to read or require mechanical connections, this digital set uses a non-contact Hall sensor for cleaner installation and more precise readings. It combines a compact display with a dedicated sensor in one package, saving you the trouble of sourcing separate components.

Specifications

- Power Requirement: DC 8-15v

• Measure Range: 5-9999 RPM

• Clear Zero: Automatic

• Display Refresh Rate: 3 Times/Sec

• Measure Indication: RPM5000, ±3

• Display: Blue & Green 0.56" LED

• Response Frequency: 100HZ

• Tachometer Dimension: 72 x 36 x 20 mm / 2.8 x 1.4 x 0.8 in

• Panel Cutout Dimension: 68 x 33 mm / 2.7 x 1.3 in

• Sensor Dimension: 12 x 55 mm / 0.5 x 2.2 in

• Proximity Output Current: 200mA

• Sensor Wiring: Brown-Power+; Blue-Power-; Black-Signal

• Operating Temperature: 0 to 50°C / 32 to 122°F

Please allow 1-3 mm / 0.04-0.12 in difference due to manual measurement.

Package Includes

- 1 x LED Tachometer RPM Speed Meter

• 1 x Hall Proximity Switch Sensor NPN

Why You Will Love It

You will appreciate how easy it is to get accurate RPM readings without complex wiring. The bright display is simple to read at a glance. This complete set saves you time and effort, letting you focus on your project instead of hunting for parts.

Questions and Answers

Question: What voltage does this tachometer need to work?

Answer: It requires a DC power supply between 8 and 15 volts.

Question: Can this sensor detect metal through plastic or wood?

Answer: No, the Hall proximity sensor is designed to detect the presence of a magnetic field or ferrous metal at very close range, not through thick non-metallic materials.

Question: What does the NPN output mean for the sensor?

Answer: NPN output means the sensor acts as a switch that connects the signal wire to ground when it detects a target. It is a common type of sensor output for many industrial controllers and tachometers.

Question: How do I wire the Hall sensor to the tachometer?

Answer: Connect the brown wire to the positive power supply, the blue wire to the negative, and the black wire to the signal input on the tachometer.

Question: Is this set suitable for measuring the RPM of a lawnmower engine?

Answer: Yes, it can be used on small engines like lawnmowers, provided you can mount the sensor near a rotating part like the flywheel or crankshaft pulley.