The Labmart HSETIN HT-522 Digital Tachometer is a handheld contact and non-contact rotational speed measuring instrument designed for checking the speed of motors, fans, pumps, rollers, machinery and other rotating equipment. It features a large LCD display, laser-based non-contact measurement, MAX/MIN/AVG memory, data hold and multiple speed units.

Product Overview

The HT-522 Digital Tachometer provides both contact and non-contact measurement of rotational speed, making it suitable for a wide range of industrial maintenance, inspection and laboratory applications.

For non-contact measurement, the instrument uses a photoelectric/laser targeting method, allowing rotational speed to be measured from a distance without physically contacting the rotating component. Contact measurement can be used where direct rotational measurement is appropriate.

The instrument features a large multi-digit LCD display, backlight, data-hold function and MAX/MIN/AVG measurement memory. Multiple units including m/min, m/s, ft/min, ft/s and in/min are supported.

Key Features and Benefits

• Contact & Non-Contact Measurement – Provides flexibility for different rotating equipment and inspection situations.
• 1–19,999 Measurement Range – Suitable for a broad range of rotational-speed measurements.
• Non-Contact Target Distance: 50–600 mm – Allows convenient remote measurement of rotating components.
• High Accuracy – Specified best accuracy of 0.02% ± 2 digits.
• Large LCD Display – Provides clear visibility of measurement results.
• MAX/MIN/AVG Memory – Helps users evaluate variations in rotational speed.
• Data Hold – Allows the measured value to be retained on the display.
• Backlight – Improves readability in lower-light working environments.
• Low-Battery Indication – Alerts the user when battery power is low.
• Automatic Power-Off – Helps conserve battery power.
• Multiple Measurement Units – Supports several linear/surface-speed units in addition to rotational-speed measurement.

4. Technical Specifications

5. Applications

The HT-522 is suitable for rotational-speed inspection of:

• Electric motors
• Pumps
• Electric fans
• Blowers
• Rollers
• Shafts
• Washing machines
• Conveyors
• Industrial machinery
• Machine tools
• Paper-making machinery
• Plastic-processing equipment
• Chemical-fibre machinery
• Automotive rotating components
• Laboratory equipment with rotating mechanisms

6. Suitable For

• Industrial maintenance departments
• Manufacturing plants
• Mechanical engineering teams
• Maintenance workshops
• Quality-control departments
• R&D laboratories
• Testing laboratories
• Automotive service facilities
• Electrical and mechanical workshops
• Machinery manufacturers
• Paper and plastic industries
• Chemical-fibre industries
• Educational engineering laboratories

7. Product Benefits

• Dual measurement capability – Contact and non-contact measurement in one instrument.
• Remote speed measurement – Non-contact operation helps measure rotating components without direct physical contact.
• High specified accuracy – 0.02% ± 2 digits for suitable measurement conditions.
• Wide target distance – 50–600 mm non-contact measurement distance.
• Memory functions – MAX, MIN and AVG readings assist with speed analysis.
• Portable handheld design – Convenient for field and maintenance measurements.
• Large backlit display – Makes readings easier to observe.
• Battery powered – Suitable for portable measurement applications.
• Automatic power-off – Helps extend battery life.