The versatile and modular QCM-D instrument

QSense Explorer is the versatile and modular instrument which enables endless experiment possibilities and the ability to combine QCM-D measurements with other techniques thanks to its compact design and exchangeable flow module. Other modules available includes window module, electrochemistry module, open module and more. See the full list of available modules. Apart from the raw data monitored in real-time, mass/thickness, viscoelastic parameters and adsorption rates  can easily be extracted from the analysis software.  

The module is connected directly to the liquid handling system which creates a controlled flow of sample over the sensor surface. 

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The QSense Explorer is a one-channel system with a removable flow module in which the sensor is placed. The instrument is compatible with all Q-Sensors. The flow module is easily placed in the measurement chamber and is kept in place by a magnet.

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The module is connected directly to the liquid handling system which creates a controlled flow of sample over the sensor surface. 

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Thanks to the modular design, the standard flow module can be exchanged to one of the optional modules, for example the window module.

Sensors and Sample handling system

Number of sensors

1

Volume above each sensor

~ 40 μl

Minimum sample volume

 ~ 300 μl

Working temperature

15 to 65

°C, controlled via the softeware, stability ± 0.02 K

Flow rates

0-1 ml/min

Cleaning

All parts exposed to liquid can be removed and cleaned in e.g. ultrasound bath

Sensors crystals*

5 MHz, 14mm diameter, polished, AT-cut, gold electrodes

Frequency and dissipation characteristics 

Frequency range

1-70 MHz (up to the 13th overtone, 65 MHz for a 5 MHz crystal)

Maximum time resolution, 1 frequency

up to 200 data points per second

Maximum mass sensitivity in liquid**

~ 0.5 ng/cm2 (5pg/mm2)

Normal mass sensitivity in liquid**

~ 1.8 ng/cm2 (18 pg/mm2)

Maximum dissipation sensitivity in liquid**

~ 0.04 x 10-6

Normal dissipation sensitivity in liquid***

~ 0.1 x 10-6

Typical noise peak to peak (RMS) in liquid****

~ 0.16 Hz (0.04 Hz)

Software 

PC requirements

USB 2.0, Windows Xp

Input data, analysis software

Multiple freqency and dissipation data

Output data, analysis software

Modelled values of viscosity, elasticity, thickness and kinetic constants

Import/Export

Excel, BMP, JPG, WMF etc.

 

 

Dimensions

Height(cm)    Width (cm)     Depth (cm)

Electronics unit

 18                  36                     21

Measurement chamber

 5                    10                     15

* Several other sensor materials are available, for example, SiO2, Titanium, Stainless stell, Polystyrene to mention a few.
** Data from 1 sensor in single frequency mode. 1 data point is collected every 5 seconds. The Sauerbrey relation is assumed to be valid.
*** Data from multiple frequency mode (7 harmonics) are collected within 1 second. The Sauerbrey relation is assumed to be valid.
**** Data from 3 harmonics are collected in about a second. Peak to peak value from one minute data acquisition.