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Test and measurement devices were HP's first products. Its first product was an audio oscillator—a device used to test sound equipment—introduced in 1938. In later years, HP continued as a leader in this category, making instruments for measurement, medical technology and chemical analysis.

Click one of the images below to learn more about that product.

Click to go to more infomation on Bill Hewlett's Prototype Resistance-Capacity Oscillator.

» Prototype Oscillator, 1938

Click to go to more infomation on the 200A Oscillator.

» 200A Oscillator, 1939

Click to go to more infomation on the 200B Oscillator.

» 200B Oscillator, 1939

Click to go to more infomation on the 300A Wave Analyzer.

» 300A Wave Analyzer, 1941

Click to go to more infomation on the 160-A Q-Meter.

» 160-A Q-Meter, 1946

Click to go to more infomation on the 400B Voltmeter.

» 400B Voltmeter, 1948

Click to go to more infomation on the 200AB Oscillator.

» 200AB Oscillator, 1952

Click to go to more infomation on the 200CD Oscillator.

» 200CD Oscillator, 1952

Click to go to more infomation on the DY-2500 Indicator.

» DY-2500 Indicator, c. 1956

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