Spi MS220708181 Electronic Height Gage 40 Inch

Product Description

The SPI MS220708181 is a large-range electronic height gage designed for precision dimensional measurement on surface plates and inspection tables. It measures from 0.0000 to 40 inches with a resolution of 0.0005 inches and an accuracy of plus or minus 0.0030 inches. The stainless steel construction provides durability in shop-floor conditions. A coarse and fine adjustment mechanism allows the slider to be precisely positioned for repeatable readings. The digital display with SPC data output makes it compatible with statistical process control systems. This instrument is suited for quality control technicians, machinists, and metrologists performing layout and inspection work.

This height gage is intended for use in machine shops, toolrooms, and quality inspection environments where large-range vertical measurement is required. The origin memory feature eliminates the need to re-zero the unit each time it is powered on, reducing setup time between measurements. It can also be used with a test indicator and holder for precise surface and feature measurement. The base measures 9-27/32 inches in length and 6 inches in width, providing a stable foundation on a granite or cast-iron surface plate.

Key Features

• 40-inch measurement range with 0.0005-inch resolution for large-scale precision work
• Accuracy of plus or minus 0.0030 inches, conforming to ASME B89.1.14
• SPC data output port for integration with statistical process control systems
• Origin memory retains the zero reference when the unit is powered off and back on
• Coarse and fine adjustment mechanism for precise slider positioning
• Inch/metric conversion switchable directly on the unit
• Compatible with test indicator and holder for indirect measurement applications

Compatibility

Designed as a standalone precision inspection instrument for use on standard surface plates in quality control, toolroom, and manufacturing inspection applications. Compatible with SPC data collection systems via the built-in data output port.

Installation Notes

Height gages of this size should be set up and operated by trained inspection or machining personnel familiar with surface-plate metrology. Place the instrument on a clean, level surface plate and allow adequate thermal stabilization time before taking measurements, especially when moving the gage from areas with significant temperature variation. The LR44 alkaline battery is included; replace only with the specified battery type to maintain consistent power to the display and memory functions. This gage is not calibrated from the factory and does not include a traceability certification — calibration to ASME B89.1.14 should be performed by a qualified metrology lab before use in a controlled inspection process.