5-Digit LED Digital Tachometer RPM Speed Meter | Brushless Motor
5-Digit LED Digital Tachometer RPM Speed Meter | Brushless Motor
5-Digit LED Digital Tachometer & RPM Speed Meter
Meet the ultimate precision instrument for measuring motor speed and frequency. This 5-digit LED digital tachometer is engineered for reliability and versatility, supporting a wide DC voltage range (3–15V) and a broad frequency measurement span from 0.15 Hz to 100 kHz. Whether you're working with brushless motors, industrial machinery, or testing rigs, this digital ratemeter delivers accurate, stable, and consistent readings every time.
Made in Mainland China.
Key Features
- 5-Digit High-Precision Display: Large LED digital tube display provides clear, easy-to-read RPM and frequency values at a glance.
- Dual-Mode Operation: Switch seamlessly between frequency and speed (RPM) measurement modes with a single key press. Your selected mode is retained even after power-off.
- Exceptional Measurement Accuracy: Accuracy up to 0.01% at 25°C; resolution down to 0.001 Hz — ideal for demanding applications.
- Wide Signal Compatibility: Recognizes dry contact, NPN, PNP, and pulse signals with an amplitude range of 3–30V. Works with motor drive outputs or external sensors.
- Flexible Frequency Division: Configurable frequency division values from 1–99,999 and 0.0001–9.9999 — power-off memory keeps your settings saved.
- Automatic Range Switching: Auto-switches display from 0.000 Hz (R/M) to 000.00 KHz (KR/M) without manual adjustment.
- Reverse Connection Protection: Built-in reverse polarity protection prevents damage if positive and negative lines are inadvertently swapped.
- Full Synchronous Cycle Measurement: Industrial-grade high-speed MCU with advanced anti-interference technology ensures stable, reliable readings across all compatible motors.
- Vibration Resistant: Engineered to withstand vibration of 10–55 Hz at 50 m/s² — suitable for workshop and industrial environments.
Technical Specifications
| Display | 5-digit LED digital tube |
| Refresh Rate | ≥3 Hz signal: 3×/sec; <3 Hz signal: ~equal to signal frequency |
| Measurement Accuracy | 0.1% ±1 digit; 0.01% at 25°C |
| Measuring Range | 0.15 Hz – 100 kHz / 9 r/m – 999.99 Kr/m |
| Measurement Method | Full synchronous cycle measurement |
| Input Resistance | 100 kΩ |
| Power Supply | DC 3–15V |
| Isolation Voltage | AC 2000V (1 min, terminal to housing) |
| Vibration Resistance | 10–55 Hz, 50 m/s², 5 min × 10 in X, Y, Z axes |
| Signal Amplitude | 3–30V |
| Material | Rubber housing |
| Country of Origin | Mainland China |
What's in the Box
- 1× Digital LED Tachometer / RPM Speed Meter
Important Notes
- Signal amplitude must remain within 3–30V; exceeding this range may cause damage to the unit.
- Color may vary slightly from images due to screen and lighting differences.
- Allow ±1 mm–1 cm tolerance due to manual measurement.
For further guidance on electrical measurement safety standards, visit the OSHA Electrical Safety resource.
Frequently Asked Questions
Q: What types of signals does this digital tachometer support?
A: This tachometer supports dry contact, NPN, PNP, and pulse signal types, with a signal amplitude range of 3–30V. It can connect directly to a motor drive output or to an external sensor, making it compatible with a wide range of brushless and other motor types.
Q: Can I use this RPM speed meter with any motor?
A: Yes — as long as the motor (or its drive) can provide a pulse speed signal, this meter can measure its RPM. The measuring range covers 9 r/m up to 999.99 Kr/m, making it suitable for everything from slow-turning motors to high-speed industrial applications.
Q: What happens if I accidentally reverse the power connections?
A: This tachometer features built-in reverse connection protection, so accidentally swapping the positive and negative power leads will not damage the unit. However, ensure that any signal input remains within the 3–30V amplitude range to avoid harm to the meter.
Q: Does the tachometer remember my settings after being powered off?
A: Yes. Both the working mode (frequency or speed) and your configured frequency division values are stored in non-volatile memory, so your settings are automatically restored each time the unit is powered on.