Device for 2D CO2 Imaging

Detector Unit DU03

Fluorescent chemical optical sensor foils combined with the imaging Detector Unit DU03 allow easy 2D visualization of carbon dioxide distributions in heterogeneous samples. For measurement the sample surface is covered with the sensor film, which translates the analyte content into a light signal. The sensor response is recorded pixel by pixel with a handheld digital camera. With VisiSens™ spatial and temporal changes of carbon dioxide can be monitored. The software allows controlling the image recording process, and assists image processing and evaluation. An easy to use camera controlling user interface manages image acquisition and storage. Measurements which belong together can be organized in user defined sessions as separate folders and annotated with a free text comment. Acquired images can be single images or automatically recorded time series.

  • Read-out of CO2 sensor foils
  • More than 100,000 measurement points within one recorded image
  • USB powered & portable
  • Small to medium size field of view (4.6 mm² to 13.5 cm²)
  • Image processing and evaluation software included
  • Visualize spatial and temporal gradients
  • Time-lapse analyte movies
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O2, pH and CO2 Mapping in Sediments

O2, pH, and CO2 are key factors for microbial activity and various geochemical processes in sediments. They highly vary locally, e.g. at interfaces or different depths. Spatial and temporal analyte dynamics over long time periods can be visualized. Various regions can be compared within one measurement. VisiSens enables non-invasive 2D-mapping over cross-sections or on sample surfaces. The portable device can be used in lab and field.

Spatial and Temporal Analyte Changes in Plants & Soil

O2, pH and CO2 play a crucial role in plant and soil processes, e. g. in photosynthesis, respiration, in rhizospheres or in microbiological processes. Metabolic processes can be monitored. This planar optical sensor technique allows non-invasive read-out through glass walls of rhizotrons. Studying metabolic activity of roots and determining the cultivation optimum is important for sustainable agriculture, e. g. for adjustment of water and fertilizer supply.

Non-invasive 2D Analyte Mapping in Microfluidics

VisiSens™ enables 2D visualization of important culture parameters inside microfluidic chips. You can continuously monitor in 2D, with high resolution at specific positions or over the whole chip surface in a non-contact readout mode. Detect metabolic hotspots, record time-series, and monitor hypoxia, cellular growth, or O2 supply inside the chip. You can gain new insights on metabolic activity and natural or artificially produced gradients.


Camera chip Enhanced Color CMOS
Image resolution 1.3 megapixel (1,280 x 1,024 pixels)
Magnification 10-fold up to 220-fold, depending on adapter tube used
Field of view ∼ 1.6 x 1.3 mm2 to ∼ 3.6 x 3.0 cm2; typically ∼ 1.2 x 1.0 cm2
Output 15 fps live video preview (no storage) and 0.5 fps full-resolution picture storage (.png)
Interface USB 2.0, high speed USB transmission
Number of LEDs 8
Material All-aluminum housing
Dimensions Length 10 cm, diameter 3.8 cm
Weight 170 g (without adapter tubus)

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