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Flow Sensors For ExiGo, UniGo and 4U Pumps

Flow sensors provide active feedback and precise flow control for ExiGo, Unigo and 4U microfluidic pumps.

• CLOSED-LOOP FEEDBACK: Flow sensors provide active feedback and precise flow control
• MODULAR: suitable for use with ExiGo syringe pumps, UniGo and 4U pressure pumps so you can mix-and-match syringe and pressure pumps giving greater flexibility for your microfluidic set-up
• FLOW RANGES: 1.5µL, 7µL, 80µL and 1mL sensors available
• PRESSURE: Maximum pressure is 30 psi (2 bar)
• LOW DEAD VOLUME: 1µL, 1.5µL, 5µL & 25µL dead volume for 1.5µL, 7µL, 80µL & 1mL sensors, respectively

Flow sensors are compatible with the ExiGo, UniGo and 4U microfluidic pumps. When the flow sensor is connected to one of these microfluidic pumps it enables active feedback and PID control. Ideal for microfluidic applications, where accurate and stable flow rate delivery is  required resulting in superior performance.

To connect the flow sensor to the microfluidic pump use the connection table below

Measurement Principle

Flow sensors are based on the thermal mass flow measurement principle.  Each flow sensor includes a microchip with a microscopic heating element and two temperatures sensors on each side of the heating element.  They are built into the exterior of the flow channel wall, isolating them from the liquid.  The heating element adds a tiny amount of heat to the liquid.  As the liquid flows through the sensor, it carries the "heat cloud" downstream, as seen in the above image. 

The temperature sensor measures the temperature upstream and downstream of the heating element through the wall without touching the liquid.  Using the difference in upstream and downstream temperature, the microchip generates a linearised, fully calibrated digital output signal.

Key Benefits

Key Benefits of this type of flow sensor include high-speed measurement (microsecond range); easy integration with standard connectors, and straight, unobstructed flow channels which contain no moving parts.

Compatability

These flow sensors are compatible for use with ExiGo syringe pumps, UniGo and 4U pressure pumps.

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