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Multisensor system can be found in many areas. In a modern laboratory, houses or other buildings, multiple sensors are used to monitor different quantities. Data from each sensor are sent to the data server for further processing. Data communication between the sensor and the server using cabling system are disorganized and inconvenient. The solution for that problem is by using wireless communication...
One of the main working principles of the Quartz Crystal Microbalance (QCM) is the relationship between the series of resonance frequency and mass change. Commonly, the sensor works as an oscillator system, where the resonant frequency is measured using a frequency counter. For a heavy damped condition, the oscillator stops to operate. This paper deals with the use of the spectral analysis approach...
Profiling a quartz (SiO2) crystal in the application of QCM biosensor is one of the efforts in enhancing its sensitivity and stability. The profiling was realized by a plasma etching method using haloalkane gas (CH2FCF3). The plasma was generated using a low frequency (40 kHz) generator with a power of 100 watts. The effectivity of haloalkane plasma was measured by varying the pressure in the reactor...
Most Quartz Crystal Microbalance biosensor system works in liquid phase utilizing flow injection system using a continuous peristaltic pump with electronic control. In the development of QCM sensor as a disposable system, sample injection using a syringe pump will be a candidate option as it can be operated manually. In this work, a flow rate effect of the microsyringe pump on the frequency stability...
Frequency counter resolution, accuracy and precision are importance parameters of the quartz crystal microbalance signal acquisition. The sensitivity of the quartz crystal microbalance is not only depended on the resonance frequency of the sensor but also the resolution of the counter. Higher counter resolution results in higher sensitivity measurement of the sensor output. In this work, a three-channel...
The thickness shear mode (TSM)-sensor responds to changes of mechanical properties of the material contacting the surface of the sensor. One of the material properties is the viscosity of a liquid. Abiosensor based on the TSM-resonator for the detection of endotoxin has been developed. It exploits the viscosity-density change during the reaction of endotoxin with limulus amebocyte lysate (LAL). The...
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