The LOTIS® Model QC-20 is a laser-based, non-contact hose measurement system. It simultaneously measures inside diameter, outside diameter, average wall thickness, and wall thickness variation. It is specifically designed to measure a hose's compliant surface where accurate and repeatable contact measurements are difficult to obtain. The QC-20 is designed for both in-process gaging and final parts inspection. Users can validate production processes by comparing actual measurements to user-defined measurement tolerances. Parts are automatically identified as passed or failed depending on measurement results. Part measurements are also accumulated in a database for statistical process control (SPC) requirements. The QC-20 comes complete with a PC compatible support computer and software. Standard hose sizes and measurement parameters are entered into the computer and stored. During operation, a hose part number is keyed in by the operator. The system automatically reconfigures itself to accurately position and measure that particular hose. Batch measurements require a single setup. A computer keystroke or a foot switch triggered by the operator initiates the measurement cycle.