Description
Product Overview
The Mengshen HT-522 handheld tachometer combines high‑speed laser aim technology with a robust 9V alkaline power source (included) to deliver instant RPM readings ranging from 2 to 99,999. Housed in a compact 8.46 x 5.12 x 2.17 in chassis weighing just 8 oz, the device features a bright, large LCD screen for clear visibility in various lighting conditions. It includes four interchangeable contact heads and a non‑contact laser sensor, allowing versatile measurement of engines, motors, drill presses, lathes, fans, washers, and conveyor surface velocity.
Usage
Designed for industrial technicians, mechanics, and DIY enthusiasts, this tachometer excels in maintenance, troubleshooting, and performance tuning. Whether you are calibrating a motor on a production line, checking the speed of a car engine, or verifying the RPM of a home workshop drill, the HT‑522 provides reliable data without the need for disassembly. 
Why Choose Us
Mengshen is known for precision engineering and durable construction. The HT‑522 is manufactured with high‑quality ABS housing and calibrated laser optics to ensure long‑term accuracy. Each unit undergoes rigorous testing and comes with a one‑year warranty, reflecting our commitment to quality and customer satisfaction.
Key Features
- Laser aim technology delivers instant, accurate RPM readings up to 99,999.
- Dual measurement modes: non‑contact laser and four interchangeable contact heads.
- Large LCD screen provides clear visibility in bright or dim environments.
- Compact, lightweight design (8 oz) for easy handheld operation.
- Powered by an included 9V alkaline battery for on‑site convenience.
FAQ
What types of equipment can I measure with this tachometer?
The HT‑522 can measure the RPM of engines, electric motors, drill presses, lathes, fans, washing machines, and even conveyor belt surface velocity.
Do I need to purchase batteries separately?
No, the package includes a 9V alkaline battery that powers the device for immediate use.
How accurate is the non‑contact laser measurement?
When used on a reflective surface within the specified range, the laser sensor provides accuracy within ±1% of the actual speed.
Can the device store measurement data?
The HT‑522 displays real‑time readings but does not have internal data storage; you can record values manually or connect to a computer via optional accessories.
Is the tachometer suitable for outdoor use?
Yes, its robust ABS housing and battery operation make it suitable for field work, though extreme temperatures may affect battery performance.




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