Home ONOSOKKI HT-4200 High Quality Non-Contact Tachometer
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ONOSOKKI

HT-4200 High Quality Non-Contact Tachometer

The HT‑4200 is a compact, rugged, non-contact handheld tachometer ideal for measuring rotational speeds from as low as 4 r/min up to 50,000 r/min. It uses a visible-light photoelectric method with reflective markers to deliver accurate, safe RPM readings from a distance..

  • Detail
  • Special Features
  • Specification

The HT-4200 is a non-contact tachometer that measures rotational speed by detecting reflected light from a target with a reflective mark applied. This method ensures accurate readings without physical contact, preventing wear or potential damage to both the tachometer and the target.

It can measure very low speeds when multiple reflective marks are used, while still supporting high-speed applications up to 50,000 r/min with a single mark. The device’s internal memory allows storage of up to 10 readings, and the auto-hold function keeps the most recent result on display for convenient recording.

Designed for portability, the HT-4200 is lightweight and compact enough to fit in a pocket. Its bright LCD display ensures clear visibility, and built-in error and low battery indicators help maintain consistent operation in any work environment.

  • Wide RPM Range – Measures from 4 r/min with multiple reflective marks to 50,000 r/min with a single mark.

  • Non-Contact Detection – Uses visible light reflection for safe, accurate RPM measurement without touching the target.

  • Long Detection Distance – Operates effectively between 20 and 300 mm from the surface.

  • High-Visibility Display – Large 5-digit LCD with 10.5 mm characters for easy reading.

  • Built-In Memory – Stores up to 10 readings for later review.

  • Data Hold Function – Retains the last measurement for about 30 seconds after recording.

  • Error & Battery Alerts – Displays error messages when out of range and alerts for low battery.

  • Pocket-Friendly and Durable – Compact, lightweight design with robust build quality.

Specification Details
Measurement Method Visible light, photoelectric reflection
Measurement Range 4 to 50,000 r/min (depending on number of reflective marks)
Resolution 1 r/min
Detection Distance 20 to 300 mm
Accuracy ±1 r/min (30–12,499 r/min), ±2 r/min (12,500–24,999 r/min), ±4 r/min (25,000–50,000 r/min)
Display 5-digit LCD, 10.5 mm character height
Measurement Update Time 1 second (2 seconds for very low speeds)
Memory Capacity Stores up to 10 readings
Hold Function Retains last reading for approximately 30 seconds
Error Indicator Displays “ERROR” when out of range
Low Battery Indicator Displays “LOW” when battery voltage drops
Power Supply 3 × AAA batteries
Battery Life Approximately 20 hours at 20 °C
Operating Temperature 0 to +40 °C
Storage Temperature –10 to +55 °C
Dimensions Approx. 62 W × 129 L × 26.4 D mm
Weight Approx. 130 g (with batteries)
Included Accessories Sheet of reflective marks (about 25 pieces), user manual