Watch tutorials, webinars and informative videos about PreSens optical sensor systems.
Modular O2, pH and CO2 Mapping System
VisiSens TD enables simultaneous 2D read-out of optical O2, pH and CO2 sensor foils within one set-up. Planar sensors for one or more analytes are placed on the sample area or in different cavities and the fluorescent sensor signals are read out pixel by pixel with a camera. Fields of view from mm2 up to 30 cm x 25 cm are possible. VisiSens TD gives an overview over your sample area and allows to freely choose the region of interest for investigation of spatial and temporal gradients or simultaneous read-out of multiple sensor signals. The modular system can be customized according to the users’ requirements.
- 3 analytes – 1 system
- Multiple sensor types combinable in one field of view
- Variable sensor and measurement geometry
- 12-bit detector
- Adaptable field of view, microscopic, 4 x 4 cm2 or up to 30 x 25 cm2
- Time-lapse slide shows of recordings
Visualizing Analytes over Large Sample Surfaces
The VisiSens TD images large areas and gathers information on spatial and temporal analyte changes, e. g. in large scale pH and CO2 imaging of root-soil interactions within rhizotrons or when analyzing biogeochemical processes in sediments. It is also well suited for application in sensitive processes, e. g. metabolic activity of living samples or tissue engineering, where O2 gradients over a cross section of a 3D graft can be monitored.
Multi-Sample and Multi-Sensor Read-Out
Large field of views enable analyte value recording in multiple samples simultaneously with free choice of measurement geometry. Even different sensor ranges can be combined. The fluorescent sensor foils can be mounted at the bottom of transparent vessels, plates or vials containing different samples and placed next to each other, e. g. in a small rack. One image taken from the bottom contains the information on analyte concentrations in a group of samples.
Three Different Analytes with one Device
The modular set-up is applicable for imaging oxygen, pH, and CO2 sensor foils with one system and in one field of view. It visualizes spatial and temporal changes of analyte concentrations. The combined information on distributions of several analytes can give valuable insight in metabolic activity or chemical processes inside samples, e. g. when investigating complex processes in cell culture, or tissues, in root systems, or when phenotyping crop plants.
Microscopic Analyte Imaging - TD MIC Configuration
VisiSens TD can be equipped with microscope optics for measuring analyte gradients with very high spatial resolution. The VisiSens TD MIC can be used e.g. to monitor spatial and temporal changes of O2 of cross-sections of multicellular tumor spheroids. The system is compact and fits into an incubator to monitor analyte changes under cell culture conditions over days.
|Oxygen (blue)||pH (red)||CO2 (green)|
|Measurement range||0 - 100 % air saturation (0 - 20.9 % O2)||pH 2.5 - 4.5||pH 5.5 - 7.5||0 - 1 % pCO2 at atmospheric pressure|
|1 - 25 % pCO2 at atmospheric pressure (1013.15 hPa)|
|Response time (t90)**||Gas phase: < 8 sec.|
Dissolved: < 30 sec.
|< 30 sec.||< 30 sec.||< 3 min.||< 3 min.|
|Limit of detection***||0.03 % air saturation|
|Precision (temporal)****||± 0.02 % air saturation|
at 0 % air saturation
± 0.1 % air saturation
at 100 % air saturation
|± 0.01 pH at pH = 4||± 0.01 pH at pH = 7||± 0.02 % CO2|
at 0.15 % CO2
± 0.02 % CO2
at 0.8 % CO2
|± 0.02 % CO2|
at 2% CO2
± 0.1 % CO2
at 25% CO2
|Precision (spatial)*****||± 1.5 % air saturation|
at 0% air saturation
± 3 % air saturation
at 100 % air saturation
|± 0.1 pH at pH = 4||± 0.1 pH at pH = 7||± 0.08 % CO2|
at 0.15 % CO2
± 0.08 % CO2
at 0.8 % CO2
|± 0.2 % CO2|
at 2 % CO2
± 1.2 % CO2
at 25 % CO2
|Compatibility||Aqueous solutions, ethanol (max. 10 % v/v), methanol (max. 10 % v/v), pH 2 - 10||Aqueous solutions, pH 2 - 9||Aqueous solutions, pH 4 - 9|
|General sensor temperature working range||from + 5 °C to + 45 °C|
* Prototype component; please contact our service team!
|VisiSens TD Basic System*||x||x||x|
|Big Area Imaging kit*||x||x||x|
|TD MIC Configuration*||x|
|Imaging Modality O2*||x|
|Imaging Modality pH*||x|
|Imaging Modality CO2*||x|
|Mixed dual or triple modes*||x||x||x|
|CaliPlate - pH Calibration Helper Plate|
|Sensor Plate Tubus Adapter*|
|Resolution Test Chart*|
|Plates with Integrated Sensor Foils*|
VisiSens™ ScientifiCal Software
VisiSens TD includes a modular control and evaluation...
Oxygen Sensor Foil SF-RPSu4
The SF-RPSu4 for measuring oxygen allows non-invasive...
pH Sensor Foils SF-HP5R
The pH sensor foils allow non-invasive mapping of pH...
CaliPlate for SF-HP5R
The CaliPlate is a small 10-well plate with integrated...
pH Sensor Foils SF-LV1R
The LV1R pH sensor foils allow for non-invasive mapping of...
CaliPlate for SF-LV1R
The CaliPlate is a small 10-well plate which eases pH sensor...
CO2 Sensor Foil SF-CD1R
This chemical optical CO2 sensor foil can be attached to any...
CO2 Sensor Foil SF-CD2R
The SF-CD2R can be attached to any sample surface or inner...