The FPS is useful as a sensor/detector for research and development, QA/QC testing, automation and diagnostics of scientific instrumentation and liquid dispensing/handling devices. Here are a few of our favorite applications:
Permittivity is a useful measure for monitoring gradients produced by LC pumps. When reproducibility is important, an FPS placed between the gradient pump and column provides assurance and a record of the gradient. Pump and solvent issues can be detected immediately.
Monitoring the biphasic eluant as it exits the CCC column provides a new level of insight on stationary phase retention and bleed in real-time. Eliminates human error and tedious manual measurements. The 1kHz data-rate allows the FPS to be used for volumetric metering of multi-phase systems -- this means real-time Sf and K.
The FPS is an excellent choice for detecting both gradual and instantaneous changes to flowing liquids. It's also useful for single and multiphase liquids and works great for bubble detection.
Total Internal Volume: 45µL
Measurment Cell Volume: 20µL
Wetted Materials: 316 SS, Borosilicate, ETFE
Fluid Connections: 10-32F (1/16” tubing)
Max pressure: 4000psi
Max flow (recommended): 100mL/min
Ambient Operating Temperature: 10~30°C
Temperature Sensor Range: -40~110°C
Data/Power Port: USB-C
Sampling Rate: 1kHz
Avg. Resolution 1-80 εr(k): ~0.03
Enclosure: 89.9x36.1x30.0mm Aluminium
Permittivity is a measure of how resistant something is (liquid in our case) to an electrical field. It's typically measured as "relative permittivity" (εr), or "dielectric constant" (k), and is an effective measure of chemical polarity. By definition a perfect vacuum has a relative permittivity of exactly 1, while water has a very high measure of ~80; most other liquids fall within this range.
The output signal of the FPS relates directly to the relative permittivity of the liquid flowing through it. It's also important to note that temperature effects permittivity, which is why the FPS has a integrated temperature sensor to correct for temperature fluctuations in harsh environments and sensitive applications.
The raw FPS Signal is an inverse log of the liquid's relative permittivity, and once calibrated can be transformed directly to relative permittivity as shown below.
Free app provides quickly and easily access to sensor data on any almost any PC, Mac or Linux device.
Stream data directly to your application via virtual serial port protocol.
Use our Corbel data system to stream, record, and analyse FPS data.
Easy to use with simple protocol and USB interface
Custom materials and flow-rates available
Integrated temperature sensor
Highly inert flow path and capable of high pressure
Built to withstand hard chemical environments