Spi MS170309049 Electronic Outside Micrometer 3 in IP54

Product Description

The SPI MS170309049 is an electronic outside micrometer designed for precise external dimensional measurement in machining, manufacturing, and quality-control environments. It measures up to 3 inches with a resolution of 0.000050 inches and an accuracy of 0.000200 inches. The carbide-tipped measuring face resists wear during high-cycle inspection work. An IP54 ingress-protection rating shields the electronics against dust and splash exposure on the shop floor. The friction thimble provides consistent measuring force to reduce operator-induced variation. A NIST traceability certification is included, supporting use in calibrated inspection processes.

This micrometer is suited for precision measurement tasks in machine shops, tool rooms, and production inspection stations. It supports both absolute and incremental measuring modes, making it adaptable to comparative measurement workflows. The rotating spindle and digital readout speed up repetitive measurements. Machinists, quality-control technicians, and metrology professionals working with parts in the 0- to 3-inch range will find this instrument appropriate for close-tolerance work.

Key Features

• Resolution of 0.000050 inches for high-precision measurement
• Accuracy rated at 0.000200 inches
• Carbide-tipped measuring face for extended wear resistance
• IP54 rating provides protection against dust and liquid splash
• Supports absolute and incremental measuring modes
• NIST traceability certification included for calibrated inspection use
• LR44 battery included; rotating spindle for smooth operation

Compatibility

Designed as a standard electronic outside micrometer for external dimensional measurement of parts up to 3 inches in diameter or thickness across general machining and inspection applications.

Installation Notes

This instrument requires no installation but should be stored in its protective case when not in use to preserve calibration and protect the carbide faces. Zero the micrometer before each measurement session according to the manufacturer procedure. Keep the measuring faces clean and free of chips or debris before contact with the workpiece. Calibration should be verified periodically against gauge blocks traceable to NIST standards.