Experience precise and convenient non-contact rotational speed measurement with this advanced Digital Tachometer. Crafted from durable ABS material, this black tachometer is designed for reliability, wear resistance, and impact protection, ensuring long-lasting use in various environments. With a broad measuring range from 2.5 RPM to an impressive 999,999 RPM, it caters to both low and extremely high-speed applications, making it an essential tool for professionals and hobbyists alike. Key Features: · Non-Contact Measurement with Laser Guidance: Activate the rotation speed measurement by pressing and holding the TEST button for over 2 seconds. The built-in red laser targets the reflective belt on the measured object, allowing accurate infrared non-contact RPM measurement. · Data Lock Functionality: Easily lock maximum, minimum, average, and real-time values during measurement for enhanced convenience and monitoring capabilities. · Adjustable Alarm Threshold: Set customized alarm thresholds to instantly alert you when the measured speed exceeds or falls below the specified limits. The screen’s red backlight will remain lit, and the measured value will flash as a clear alarm signal. · High Accuracy and Resolution: Provides precise readings with an accuracy of ±(0.05% reading + 1 digit). Resolution ranges from 0.1 RPM for speeds between 2.5 and 999 RPM to 1 RPM for speeds exceeding 1,000 RPM. · Large Six-Digit Display: The clear, six-digit digital display supports speeds up to 999,999 RPM, ensuring easy readability of measurements. · Wide Measuring Effective Distance: Measures effectively from approximately 50 to 500 mm (1.97 to 19.69 inches), adding flexibility for various measurement scenarios. · User-Friendly Design: Features automatic shutdown after 10 minutes of inactivity (which can be disabled) to conserve battery life, and operates efficiently in indoor environments ranging from -10°C to 50°C with a maximum humidity of 80%. · Portable and Convenient: Includes a protective cloth bag for easy storage and transportation, making it perfect for field use. Specifications: · Item Type: Digital Tachometer · Material: ABS · Color: Black · Measuring Range: 2.5 RPM to 999,999 RPM · Resolution: 0.1 RPM (2.5–999 RPM), 1 RPM (above 1000 RPM) · Accuracy: ±(0.05% Reading + 1 digit) · Speed Display: Six-digit, max 999,999 · Measuring Effective Distance: Approx. 50 to 500 mm (1.97 to 19.69 in) · Sampling Time: 0.8 seconds (above 60 RPM) · Automatic Shutdown: 10 minutes (can be disabled) · Operating Environment: -10 to 50 ℃, max 80% relative humidity, altitude < 2000 m (6561.7 ft) · Storage Environment: -10 to 50 ℃, max 70% relative humidity (battery removed) · Display Size: Approx. 37 x 41 mm (1.46 x 1.61 in) · Battery: 3 x 1.5V AAA (not included) Package Includes: · 1 x Digital Tachometer · 1 x Cloth Carrying Bag This Digital Tachometer offers accurate, easy-to-use, and safe RPM measurement with enhanced features including data locking, alarm thresholds, and a clear laser guide. Its rugged ABS construction and portable design make it an indispensable tool for precise speed measurement in industrial, mechanical, and laboratory applications.