Mitutoyo 209-938 Internal Electronic Caliper Gage

Product Description

The MITUTOYO 209-938 is an internal electronic caliper gage designed to measure bore diameters, internal grooves, and small internal features with high precision. It operates over a measurement range of 30 mm to 50 mm (approximately 1.18 inches to 1.97 inches) and delivers a resolution of 0.01 mm (0.0005 inch), making it suitable for close-tolerance inspection work. The gage features ball-type contact points suited for seating inside grooves and bores. It is used by machinists, tool-and-die technicians, quality control inspectors, and maintenance professionals who require reliable internal dimensional verification.

This gage is well suited for shop-floor and inspection-room applications where internal groove width and bore diameter checks are part of routine quality assurance. The groove depth capacity of 7 mm allows it to reach recessed internal features that standard jaw-type calipers cannot access. It is appropriate for use in light manufacturing, precision maintenance, and component inspection environments where internal measurements in the 30 mm to 50 mm range are frequently required.

Key Features

• Internal measurement range of 30 mm to 50 mm (up to 1.97 inches)
• Resolution of 0.01 mm (0.0005 inch) for precise dimensional readings
• Ball/ball contact point configuration for accurate seating in grooves and bores
• Groove depth capacity of 7 mm for recessed internal feature access
• Groove width capacity of 0.06 inch, suitable for narrow internal groove measurement
• Electronic digital readout for fast, easy-to-read results

Compatibility

Designed as an OEM-style internal electronic caliper gage for precision measurement applications requiring a 30 mm to 50 mm internal range with ball-type contact points.

Installation Notes

This gage is handled and used by qualified metrology or quality control personnel rather than installed in a fixed system. Before use, ensure contact points are clean and free of debris, as contamination will affect measurement accuracy. Zero the gage according to the manufacturer calibration procedure before taking readings. Store in the provided case when not in use to protect the contact points and electronic components.