Selected Probes
Sensor Spots
Sensor Spots (SP) are the most versatile version of non-invasive pH sensors. They are attached to the inner surface of any transparent vessel.
Examples are
- Shake flasks & spinners
- Tubes & petri dishes
- Cultivation bags
The transmitter with its optical fiber can be fixed opposite the sensor spot using our accessories (see our accessories brochure) which can be adapted for nearly all kinds of vessels.
Flow-Through Cell
The flow-through pH minisensor (FTC) is a miniaturized fiber chemical optical sensor integrated in a flow-through cell. It is connected to the transmitter by an optical fiber. The volume of liquid inside the FTC is about 250 micro-litres. The standard flow cell can be easily connected via Luer-Lock adapters to external tubing. The FTC is beta-irradiated and pre-calibrated.
Measurement Principle
The Patented Dual Lifetime Referenced (DLR) Method
The patented DLR method enables internally referenced measurements. A combination of different fluorescent dyes detects intensity changes in the time domain. It is essential for the pre-calibrated measurements and the easy parallelisation of measurement through the identical calibration of large numbers of sensor spots.