Portable Weak Signal Amplifier DSA-I

Has good sensor adaptation function           High precision, low misalignment

To meet the requirements for high-precision, high-sensitivity, and high-frequency-response measurement of weak voltage signals output by sensors such as pore water pressure gauges, earth pressure gauges, water pressure gauges, and strain gauges under multi-field coupling and complex soil environments, and to achieve reliable signal transmission over relatively long distances (≥50 m), while also accommodating special working conditions such as static/dynamic centrifuge tests, it is necessary to accurately measure the high-frequency and high-precision input voltage signals from the sensors.nThis requires the weak signal amplifier itself to possess core performances including high natural frequency, extremely short rise time, high common-mode rejection ratio, and low distortion, so as to ensure the accurate reproduction of sensor signals. The DSA-I weak signal amplifier is designed based on the above requirements. This device adopts a portable and miniaturized structure, equipped with domestic high-performance amplifier chips. Through advanced welding technology and miniaturized manufacturing and packaging techniques, the entire amplifier circuit is integrated and encapsulated inside a protective housing, combining the practical advantages of small effective size, fine wire diameter, compact structure, and high robustness.

Typical features

• Miniaturization, with a minimum length of 50mm and a width of 25mm;

• Amplification factor of weak signals: 1.5~100;

• Capable of amplifying weak AC and DC voltage signals;

• Good waterproof performance, with an protection grade of IP67;

• Operating range of temperature and humidity: -40~+80℃, ≤95RH%;

• High reliability, high precision, high stability, and low offset;

• High resolution, with input signals within 0.1mV;

• Equipped with interference and noise filtering function;

• Resistance to strong electromagnetic fields, high centrifugal force, impact, and insulation against electricity;

Typical applications

• Conventional vibration table test

• Geotechnical centrifugal model test

• In situ monitoring test

• Unit model test