LIQUID LEVEL DETECTION METHOD AND DEVICE, AND IMMUNOASSAY ANALYZER

摘要

Disclosed are a liquid level detection method and device, and an immunoassay analyzer. By changing power source input of a signal drive circuit (20), the effective voltage of a drive signal applied by the signal drive circuit (20) on a liquid absorbing needle (10) is the negative voltage, so that the liquid absorbing needle (10) is protected as the cathode in an electrolytic cell formed between the liquid absorbing needle (10) and the cleaning fluid, and is prevented from being corroded by the cleaning fluid and rusting. Moreover, the intrinsic detection flexibility and performance of the liquid level detection device can be ensured, and the requirements on the materials and process of the liquid absorbing needle (10) are not high, thereby effectively controlling the cost.