A quartz crystal microbalance (QCM) (also known as quartz microbalance (QMB), sometimes also as quartz crystal nanobalance (QCN)) measures a mass variation per unit area by measuring the change in frequency of a quartz crystal resonator.

Feb 15, 2025 · Quartz crystal microbalance (QCM) humidity sensors have been extensively developed due to their high sensitivity, digital output, strong anti-interference ability, low energy consumption, and ease of modification.

Determining moisture concentration in natural gas, industrial gases or process gas is critical to many applications. QCM and electrolytic analyzers deliver fast, reliable and cost-effective measurements that support these processes.

Nov 15, 2024 · Knowing the nominal resonant frequency of a given resonator, an impedance or rather an admittance measurement is performed by the QCM at frequencies around the nominal resonant frequency. Plotting the real part of the admittance also known as the susceptance as a function of the frequency, we obtain the curve shown in Fig. 1 on the right.

medium exchanges onto 5 MHz QCM sensors. Introduction . The Tracking Recovery feature included in AWSensors X1 platform allows the user to monitor large and fast frequency shifts in QCM (Quartz Crystal Microbalance) admittance spectrum. These sudden modifications in the sensor response are common is some applications where

Here, we use before and after gravimetric mass measure-ments, linked directly to the SI, to measure mass change. A custom vacuum metal deposition system is used to deposit gold lms of various masses onto a series of quartz crystals while the mass dependent frequency change is monitored in real time.

May 31, 2019 · When a QCM is used in a liquid, however, its resonance frequency is known to be affected not just by the mass load but also by the viscous load of the liquid. Using a network analyzer, we analyzed the impedance of an AT-cut quartz resonator.

Crystal Microbalance (QCM) technology and demonstrate the extremely sensitive nature of these piezoelectric devices towards mass changes at the surface of QCM electrodes.

Within surface science, a quartz crystal microbalance with dissipation monitoring (QCM-D) is a type of quartz crystal microbalance (QCM) based on the ring-down technique. It is used in interfacial acoustic sensing. Its most common application is the determination of a film thickness in a liquid environment (such as the thickness of an adsorbed ...

This section provides an introduction to the quartz crystal microbalance (QCM) which is an instrument that allows a user to monitor small mass changes on an electrode.