The Comparison Tester is a precision tool used to calibrate and verify the accuracy of pressure gauges and instruments. It enables users to compare readings from a test instrument against a trusted master gauge under controlled pressure conditions. Suitable for both pneumatic and hydraulic systems, this tester is ideal for calibration labs, manufacturing units, and maintenance workshops. Its rugged construction, easy operation, and fine pressure control make it a reliable solution for routine checks and professional calibration. Designed for accuracy, consistency, and durability, the Comparison Tester helps ensure all pressure measuring devices perform within acceptable standards and deliver reliable readings.