9 Measuring, detecting and monitoring instruments, indicators and controllers, namely, pressure measuring apparatus not for medical purposes, pressure sensors, temperature sensors, flow sensors, surface acoustic wave sensors, optical sensors, hydrophones, accelerometers, strain gauges, distance measuring apparatus, sensors for the determination of positions, distances, velocity, and acceleration, fiber optic sensors; Measuring, counting, alignment and calibration instruments, namely, industrial calibration sensors, calibration devices for calibrating measuring apparatus and instruments; Electronic data loggers and recorders; Optical interrogators for use with optical sensors; Fiber optic interrogators, namely, optical interrogators for use with optical sensors; Data acquisition and analysis software