The Pulsed Flow Sensor (PFS) is a small volume flow sensor, based on the basic principle of a pressure drop over a restrictor in a flow channel. The advantage of this principle is, that combined with fast reacting pressure sensors it has a very short response time of about 1 millisecond.
The PFS further uses friction to determine the fluids viscosity. With this additional information the sensor electronics are capable of measuring a viscosity independent volume flow. This means that the fluids viscosity properties don't have to be known, neither calibrated to get an accurate volume flow measurement.
The PFS micro flow sensor measures only one-directional, but a bidirectional Version is possible. Because of the PFSs short reaction time, it is able to detect very quick changes in the volume flow, such as an opening of a valve.
This micro flow sensor has been initially developped to measure the flow through a micro dispensing valve. Micro dispensing valves usually use pressurized fluid from a reservoir and they are activated by an electromagnetic coil. Because micro valves have very short opening times of only a few milliseconds, the flow sensor needs to have a very short reaction time and high sampling rate of 20 kHz, to be able to capture this event properly.
Because the Pulsed Flow Sensor is capable of measuring strong fluctuating flow, it can be used to monitor the flow of pulsating pumps. For pump manufacturers the pulseform can be measured to optimize the pumping performance of their product. In other applications the volume flow of the pump just has to be measured to control the process.
The Pulsed Flow Sensor was designed to measure volume flows that take microseconds to minutes. It can automatically Integrate the volume flow to determine the processed volume from a dispensing or sampling process.
The B-drop mini is a very fast and low cost micro dispensing valve. It can be operated from 3 volts and reaches opening times of below 0.5 ms in a peak- and- hold operation mode. This small micro valve is meant for fast and reliable dispensing tasks where cleanness and cost matter. The micro valve can be sterilized with gamma radiation and doesn't contain a mechanical spring. The B-drop mini closes due to a magnetic force which means it is normally closed. A speciality of this micro valve is, that it can be activated in both directions by a pole change0. We recommend the ReseaTech 4-Channel Valve controller to drive the B-drop mini.
Please contact us for special versions of the B-drop mini like normally-open, bipolar, or steam sterilizeable.
+ Dimensions: L 33mm, D 8.5 mm, M5 thread + Nozzle: 0.2 mm + Materials in contact with media: stainless steel, silicone, parylene, epoxy + Dynamic viscosity range: 1-20 mPas + Operating pressure: up to 6 bars
The FoamFighter is an autonomous foam detection-system. With it´s optical sensor the FoamFighter detects growing foam levels inside of your bioreactor and automaticaly injects a pre-defined amount of anti-foam from a standard syringe. Due to the adjustable sensitivity and adjustable spot of detection the FoamFighter allows you to optimise your anti-foam strategy and therefore to decrease the amount of anti-foam in your culture.
Moreover the external arrangement and optical sensor allows the system to be added to experiments which are already in progress.
The Foamfighter is perfectly suited for glass and sigle-use stirred tanks and is easily mounted at the head-plate of your bioreactor.
+ non-invasive foam detection + external application + control and feedback signals for system integration + adjustable foam tolerance level + adjustable Detection distance
+ stirring unit to prevent anti foam from sedimenting + custom heating covers with sensor window + custom adapters to fit your bioreactor system
Thank you for visiting ReseaTech.
At ReseaTech, we provide complete solutions for micro-dispensing and measuring of microliter droplets, flow sensors with ultra-short response time for pulsating flow, and optical anti-foam systems for glass and single-use bioreactors.
ReseaTech is a technology partner and supplyer of fluid handling systems with focus on biotechnology research applications.
On request, ReseaTech develops and builds custom solutions for the biotech laboratory.