One Platform for the Complete Sensing Experiment

VOC sensing experiments often require multiple independently assembled components: a chamber, heating arrangement, temperature measurement, electrical instrumentation, VOC dosing calculations, tubing, fittings and a recovery system.

Schnaiffer integrates these functions into a practical benchtop platform so researchers can focus on sensor materials, device performance and experimental data rather than repeatedly rebuilding the test environment.

The system supports the complete workflow:

Set concentration → Calculate VOC dose → Inject VOC → Monitor sensor response → Recover sensor → Repeat

Controlled VOC Concentration

The setup enables controlled introduction of a calculated quantity of liquid VOC into a known chamber volume.

The researcher enters the required experimental parameters into the VOC concentration calculator, which determines the injection volume required to generate the target vapor concentration.

This makes preparation of controlled ppm and ppb VOC environments considerably more systematic than estimating injection quantities manually.

Typical experimental variables can include:

• Target VOC concentration

• Chamber volume

• VOC identity

• Required injection volume

• Experimental temperature

• Exposure and recovery conditions

The calculated VOC quantity can then be introduced directly into the chamber using a microsyringe.

A Versatile Conductive Surface for Research

Multi-Port Heated Glass Sensing Chamber

At the heart of the platform is a multi-neck laboratory glass chamber housed inside a temperature-controlled enclosure.

The multi-port architecture provides independent access for the major experimental functions rather than forcing electrical, gas and temperature connections through a single opening.

Ports can be configured for:

Pump inlet — establishes controlled airflow or assists chamber recovery.

VOC inlet — permits syringe-based introduction of the calculated VOC quantity.

Temperature feedback — accommodates a thermocouple or RTD for measurement of the actual chamber temperature.

Pump outlet — connects the chamber to the recovery/exhaust line.

Additional configurations can be developed where experiments require multiple gases, humidity introduction or additional sensing probes.

Temperature-Controlled Sensor Testing

Many metal-oxide, semiconductor and functional-material gas sensors exhibit strongly temperature-dependent behavior.

The integrated heating system allows the chamber environment to be maintained at a selected experimental temperature while a feedback sensor measures the actual chamber condition.

The closed-loop arrangement provides:

• Adjustable experimental temperature

• Temperature feedback

• Controlled heating

• Improved repeatability between measurements

• Elevated-temperature sensor characterization

• Temperature-dependent response studies

This is particularly useful when studying metal-oxide semiconductor gas sensors, nanomaterial sensors and thermally activated sensing films.

Sensor Mounted Inside the Actual Test Environment

The sensing device is positioned on a dedicated electrically insulating ceramic stage inside the glass chamber.

This provides a stable platform for mounting the sensor while maintaining electrical access to the device during VOC exposure.

The architecture can accommodate Schnaiffer IDE-based sensors as well as compatible customer-fabricated devices.

Compatible sensor formats

The platform is suitable for characterization of:

• Interdigitated electrode sensors

• Metal-oxide gas sensors

• VOC sensors

• Thin-film sensors

• Nanomaterial-coated sensors

• Polymer sensing films

• Nanocomposite sensors

• Resistive sensors

• Capacitive sensors

• Impedance-based sensors

• Chemiresistive devices

• Experimental microdevices

Real-Time Electrical Response Monitoring

Electrical connections from the sensor are brought outside the chamber for connection to the required measurement instrument.

Depending on the sensing principle, researchers can monitor parameters such as:

Resistance • Conductance • Capacitance • Impedance • Voltage • Current

A digital multimeter can be used for straightforward resistance or voltage measurements, while an LCR meter, impedance analyzer, source-measure unit or dedicated sensor-interface electronics can be connected when required by the experiment.

This modular measurement architecture prevents the test setup from restricting researchers to a single sensor-transduction mechanism.

What Can You Measure?

The system is designed not merely to demonstrate that a sensor responds, but to help generate the characteristic performance curves expected during sensor development.

Researchers can investigate:

Sensor response vs VOC concentration
Determine how electrical response changes from lower to higher analyte concentrations.

Response and recovery time
Measure the dynamic behavior during VOC introduction and chamber recovery.

Operating-temperature dependence
Determine how sensor performance changes with experimental temperature.

Repeatability
Run repeated exposure/recovery cycles under comparable conditions.

Selectivity
Compare responses to different VOCs under controlled experimental conditions.

Sensitivity and calibration behavior
Generate concentration-response data for calibration and comparative studies.

Baseline stability
Observe drift before, during and between repeated exposures.

Material comparison
Test different sensing coatings on equivalent electrode structures.

Applications

Gas Sensor Research

Characterize newly developed sensing materials and devices under controlled vapor exposure.

VOC Sensor Development

Evaluate sensors targeting acetone, ethanol, methanol, toluene and other compatible volatile compounds.

Nanomaterial Sensor Characterization

Study sensing layers based on metal oxides, 2D materials, nanoparticles, nanocomposites and functional thin films.

Breath-Biomarker Research

Investigate experimental sensors targeting VOCs relevant to breath-analysis research under controlled laboratory conditions. The platform itself is a research system and is not a clinical diagnostic device.

Environmental Monitoring R&D

Develop sensing elements intended for indoor air quality, industrial vapor and environmental VOC monitoring.

Electronic Nose Research

Generate controlled response datasets from individual sensors or sensor arrays for pattern-recognition and machine-learning studies.

Academic Research & Teaching

Provide laboratories with an integrated platform for sensor-material characterization, student projects, thesis work and gas-sensing experiments.

A Complete Schnaiffer Sensor Development Ecosystem

The platform can be paired directly with Schnaiffer interdigitated electrode substrates.

Researchers can deposit or functionalize their sensing material on an IDE, mount the resulting device on the ceramic stage, connect the electrodes to the measurement system and perform controlled VOC characterization.

This creates a practical development chain:

IDE substrate → Sensing-film deposition → Device mounting → Controlled VOC exposure → Electrical characterization → Performance evaluation

It allows researchers to source the electrode platform and characterization setup within the same sensing-development ecosystem.

Request the IDE catalogue, dimensional drawings, price quotation or custom-design review.

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