ARCMASTER IRG-3600 Radius Gauge for internal measurement 150-3600 mm

This gauge is ideal for taking radius measurements from the inside curvature of a boat, aircraft, archway, railing, etc., anything that is not accessible from the outside. These dependable, all-weather gauges are usable in any environment.

The measuring tolerance is +/- 0,5% for all measurements. In most cases this is only suitable as a reference measurement. All gauges are tested and adjusted to a tolerance of better than +/- 0,5% on all measurements.

The minimum chord (distance between outer contact points) needed for the radius gauge to take a measurement is 13″ (330 mm).

Please know that this gauge is NOT recognized by any (ISO) International Standards Organizations and there is NO calibration certificate for the gauge. The gauge should be used for REFERENCE only. They are NOT registered with any Industry Standards Organization.

IMPORTANT:
What you should do when you first receive your radius gauge.

To ensure proper calibration of your radius gauge, we recommend that at first use, check the gauge on a sample arc and record the measurement. This sample arc should have a radius of 100” or larger. The larger the radius sample your gauge is checked on, the more accurate the check. Make a note of the radius measurement on the sample arc and refer to this sample arc for all your regular radius checks.