Abstract: A cell measurement system measures changes of frequency and transepithelial electrical resistance of a tested cell sample. The cell measurement system includes a quartz crystal sensing module, an oscillation module, a periodic wave-generation module, a low-pass filtration module, and a control module. The cell measurement system of the present invention can simultaneously measure changes of frequency and transepithelial electrical resistance of a tested cell sample during cell growth so that the growth level and healthy condition of the cells and degree of a monolayer completion of the cells can be determined.

Abstract: A dual mode measurement system with quartz crystal microbalance (QCM) is provided, which includes a quartz sensing component, a first measurement circuit, a second measurement circuit and a switch unit. When the first measurement circuit is selected through the switch unit, the first measurement circuit and the quartz sensing component form an oscillation circuit and output a resonance signal. When the second measurement circuit is selected through the switch unit, the second measurement circuit outputs a frequency scanning signal to scan the quartz sensing component, so as to output an impedance sensing signal.

Abstract: The present invention relates to a cell culture device which includes: a cell culture container comprising a container body and a neck connecting to the container body wherein the container contains a top wall, a bottom wall having a first opening, and at least one side wall to define a cell culture zone, and an end of the neck has a second opening for cells or culture media being injected into the cell culture zone; a biosensor chip having a detective surface which faces the top wall of the cell culture container; and a fastening component for the biosensor chip being fastened in the first opening of the bottom wall. The cell culture of the present invention can be used for real-time detection of the cell growth and further for drug screening.

Abstract: A dual mode measurement system with quartz crystal microbalance (QCM) is provided, which includes a quartz sensing component, a first measurement circuit, a second measurement circuit and a switch unit. When the first measurement circuit is selected through the switch unit, the first measurement circuit and the quartz sensing component form an oscillation circuit and output a resonance signal. When the second measurement circuit is selected through the switch unit, the second measurement circuit outputs a frequency scanning signal to scan the quartz sensing component, so as to output an impedance sensing signal.

Abstract: This present invention relates to a system for measuring resonant frequency and delay time of the quartz crystal microbalance. The system includes a transistor oscillating circuit, a switch circuit, a comparator circuit, and a control circuit. The transistor oscillating circuit comprises a quartz oscillator for generating an original oscillating signal. The switch circuit is coupled to the transistor oscillating circuit for outputting a start signal to generate the original oscillating signal. The comparator circuit is coupled to the transistor oscillating circuit for transforming the original oscillating signal to a square wave oscillating signal. The control circuit is coupled to the comparator circuit for receiving the square oscillating signal to estimate the resonant frequency and the delay time of the quartz crystal microbalance.

Abstract: This present invention relates to a system for measuring resonant frequency and delay time of the quartz crystal microbalance. The system includes a transistor oscillating circuit, a switch circuit, a comparator circuit, and a control circuit. The transistor oscillating circuit comprises a quartz oscillator for generating an original oscillating signal. The switch circuit is coupled to the transistor oscillating circuit for outputting a start signal to generate the original oscillating signal. The comparator circuit is coupled to the transistor oscillating circuit for transforming the original oscillating signal to a square wave oscillating signal. The control circuit is coupled to the comparator circuit for receiving the square oscillating signal to estimate the resonant frequency and the delay time of the quartz crystal microbalance.