FAQs


VisiSens


The standard size of the sensor foils is rectangle 4 x 4 cm. What can I do, if my sample requires a different size or shape?

Which side of the sensor foil has to face the sample?

How can I save a slide show animation as a movie file?

What exactly does the function Live Profiles do and what information can I get from it?


Carbon Dioxide Sensors


What is the operating principle of the CO2 sensor?

Can I measure CO2 also in a gas phase or only in liquid phase?

What happens if the temperature changes while measuring?

Do I measure CO2 or HCO3-?

Does the pH of the sample affect my reading?


General


Can the same device be used for pH, oxygen or CO2 sensors?

Can I use the same device for microsensors, non-invasive sensors and invasive probes?

Which substances can interfere with the measurement?

Do the sensors work in turbid solutions?

Can I measure inside a tissue?

Is the glue or the spot biocompatible - which tests were done? Are there any studies on leachables and extractables?

Which glue can I use?

Can I sterilize the sensors?

Compensation of pressure / salinity?

What is the time of delivery?

Which lengths of the POFs (polymer optical fiber) are available?

Where do I need sensor spot sizes different from the common diameter of 5 mm (approx. 0.2 inch)?

In which vessel can I integrate a sensor spot?

How do I import data into excel from a text file containing measurement data?

How can I convert an oxygen value into a different oxygen unit?


Oxygen Microsensor


What is the difference between tapered and flat-broken sensor tips?

How do I measure the oxygen content in small headspace packages with a needle-type oxygen microsensor?

How do I use the oxygen microsensor for measurement in ice?

Can I integrate an oxygen microsensor into a catheter?

I can see that about 1 mm of the tapered sensor tip of an oxygen microsensor is coated with material. Is all of this coating sensitive to oxygen and where exactly do I measure?


Oxygen Sensors


How does an oxygen sensor work?

What are the response times for the oxygen sensors based on the 2 mm fiber like non-invasive oxygen sensors and oxygen probes?

How do I verify whether the sensor is giving correct readings?

Which side of the sensor spot should face the medium?

The Stern-Volmer-equation

How can I prepare the calibration solutions cal0 and cal100?

What factors will affect the oxygen reading?

I use a glass vessel with an integrated autoclavable oxygen sensor. How do I remove this sensor?

How does salinity affect the measurement?

How does temperature affect the oxygen measurement?


pH Sensors


Which side of the sensor spot should face the medium?

How can I clean non-invasive pH sensors?

Can I use Ethanol for disinfecting non-invasive pH sensors?

How to prepare buffers of constant ionic strength and calibrate optical pH sensors?

Why does my pH sensor not work in tap water?


SDR SensorDish Reader


Do SensorDishes come sterile?

Which toxicity tests where done with the SensorDish?

Can I use the SDR with other formats than the 24-well plates?

Do cells grow on the sensor inside the Sensor Dishes?

Why do I see peaks in the graphs of the SDR software (especially in the oxygen signal) when I open the incubator door / take the plates out of the incubator?


Sensor Plates


Is my microplate reader compatible to the SensorPlates?

The filters of my reader do not exactly match the combination in the disposable brochure. Nevertheless, can I use them?


SFR Shake Flask Reader


Which types and sizes of shake flasks with integrated sensors are offered by PreSens?

Can the customer integrate the sensors by himself / herself?

Can I re-use the shake flasks with integrated sensors?

Does the SFR fit into my incubator / shaker?

Your pictures show clamps. Can I also work with sticky mats?