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QSense Sensors

Standard sensors
The sensor is at the heart of the QCM-D experiment. Browse the widest range of sensors on the market to find out which sensor material and coating is best suited for your research. 
We offer over 50 standard sensors - from various metals, oxides and carbides to polymers, functionalized coatings and standardized soils. Our sensors are developed and produced to provide you with stable, reliable and reproducible data. Full performance is ensured through extensive quality controls and guaranteed for one-time use according to the recommendations. All QSense sensors are 5 MHz sensors to optimize the useful sensitivity, the sensing depth and the information required to quantify soft films.
Customized sensors
Sensor materials and coatings based on your specific needs
Read more

Browse the list below to find your choice of sensor

Gold-Sensor
QSX 301

Gold

Our most common sensor QSense Gold provides a good base for your experiment. QSX 301 comes in a box of 5 sensors.

$ $ $
1 week delivery
Sensor surface Gold (Au)
Surface roughness < 1 nm RMS
Usage QSense sensors are intended for one-time use only
Storage Store in a cool, dry place out of light
Shelf life Sensors will be stable at least 12 months from delivery
Baseline stability Stable baseline in air and deionized water in 22 °C. There is no guarantee that the coating will be stable under all experimental conditions.
Silicon-dioxide-sensor
QSX 303

Silicon Dioxide

The QSense Silicon dioxide sensor is a good fit for studying etching processes, silanization, cleaning and detergents. QSX 303 comes in a box of 5 sensors. 

$ $ $
1 week delivery
Sensor surface Silicon dioxide (SiO2)
Surface roughness < 1 nm RMS
Usage QSense sensors are intended for one-time use only
Storage Store in a cool, dry place out of light
Shelf life Sensor will be stable at least 12 months from delivery
Baseline stability Stable baseline in air and deionized water in 22 °C. There is no guarantee that the coating will be stable under all experimental conditions. Do not expose to strong bases.
Stainless-Steel-Sensor
QSX 304

Stainless Steel SS2343

QSense Stainless steel sensor. QSX 304 comes in a box of 5 sensors. 

$ $ $
1 week delivery
Sensor surface Stainless Steel (SS2343)
Surface roughness < 1 nm RMS
Usage QSense sensors are intended for one-time use only
Storage Store in a cool, dry place out of light
Shelf life Sensor will be stable at least 12 months from delivery
Baseline stability Stable baseline in air and deionized water in 22 °C. There is no guarantee that the coating will be stable under all experimental conditions. Do not expose to strong acids.
Polystyrene-sensor
QSX 305

PS-Hydrophobic Polystyrene

QSense polystyrene sensor sensor. QSX 305 comes in a box of 5 sensors. 

$ $ $
6 weeks delivery
Sensor surface Polystyrene (PS)
Surface roughness < 1 nm RMS
Usage QSense sensors are intended for one-time use only
Storage The sensor is delivered in inert atmosphere. Store in a cool, dry place out of light. 
Shelf life Stable at least 12 months from package date in unopened package, see expiry date on package
Baseline stability Stable baseline in air and deionized water in 22 °C. There is no guarantee that the coating will be stable under all experimental conditions. Do not expose to strong acids. Do not expose to organic solvents.
Sensor feature

UV/Ozone treatment of PS might result in new, unwanted chemical composition of the surface. Please note that PS is very hydrophobic and that air bubbles are easily formed on the surface when working with water-based solutions. To reduce the risk of bubble formation, make sure to degas the solutions and to preheat them when working at temperatures above RT. It is also possible to pre-wet the sensor surfaces with ethanol and then replace ethanol with the water-based solution.

Aluminium-oxide-sensor
QSX 309

Aluminium Oxide

Aluminium oxide sensor. QSX 309 comes in a box of 5 sensors. 

$ $ $
1 week delivery
Sensor surface Aluminium oxide Al2O3
Surface roughness < 2 nm RMS
Usage QSense sensors are intended for one-time use only
Storage Store in a cool, dry place out of light
Shelf life Sensor will be stable at least 8 months from delivery
Baseline stability There is no guarantee that the coating will be stable under all experimental conditions. Do not expose to strong acids and bases. Use within a pH range of 4-9 to avoid corrosion.
Amine-coupling-sensor
QSX 341

Amine Coupling

Immobilizing biomolecules in their functional state will facilitate the study and characterization of biomolecular interactions.

The QSense Amine Coupling Sensor enables covalent immobilization of biomolecules via their primary amino groups (-NH2) to a PEG coating activated with N-hydroxysuccinimide (NHS). This allows for easy immo­bilization of biomolecules. Non-reacted NHS groups are easily washed off, the non-reactive PEG coating will provide for a low and stable background signal.

• Delivered with NHS ester activated compound
• Fast and easy immobilization
• Can immobilize any molecule of interest with free primary amine group
• Applications includes immobilizing antibody for further characterization, protein-protein interactions and the study of protein conformational changes

Amine coupling sensor QSX 341 comes in a box of 5 sensors. 

$ $ $
6 weeks delivery
Sensor surface SiO2
Top coating

Polyethylene glycol (PEG) 3 nm coating, functionalization with a density of 1014 NHS molecules/cm2

Binding The reactive NHS ester compound on the sensor are replaced with a covalent linkage to the protein via its primary amine group(s).
Specificity The non-reactive zero-background PEG coating minimizes non-specific binding
Usage Direct mounting of sensor into the instrument without prior cleaning (to remove dust
particles, dust blow with N2 gas). The sensors are supplied with blocking buffer to remove non-reacted NHS molecules.
Storage Store in original vacuum-bag at -20 to -80 °C. Store sensor from opened vacuum-bag in 100% nitrogen environment or use a vacuum desiccator.
Shelf life Stable for at least 8 weeks from package date in unopened package, see expiry date on package
QSense-sensor-crop-2

Customized sensors

Try our custom sensors

Our sensors can be coated with basically any material, building a model system for the research problem you want to explore. Through the years our customers have challenged us to deliver a wide range of custom-made surface coatings to fit their specific experiment. Some are now in our standard collection and many can be made upon request. Are you interested in our customized sensors, let us know by describing the sensor you need. 

Request a quote