Airflow pulsation is a challenge faced by many designers, often limiting the signal-to-noise ratio (SNR) and the resulting sensitivity. Instruments often include baffles, accumulators and other damping hardware to reduce pulsation. Disc Pump™ moves a tiny quantity of air per cycle, typically in the range of 10s to 100s nanolitres, resulting in negligible pulsation in pressure and flow. The resulting ultra-smooth output means that Disc Pump™ can deliver flow directly to the sensor, eliminating the need for damping hardware altogether.
Accuracy also benefits from pulsation-free flow. When paired with an appropriate pressure or flow sensor, set points can be held within a fraction of a percent, with less than 0.1% often readily achievable. The stable, flat output helps to minimise integration error when calculating the pumped volume, which in turn supports accurate concentration measurements well into the ppb range. The ultra-smooth, controllable flow and silent operation also benefit particle counting applications.
Portability and Wearability
The growing trend for portable and personal, wearable systems requires smaller and lighter components. Disc Pump™ weighs just 5 g (1/5 oz) and occupies a volume of 7 cm3. By eliminating the need for damping hardware, Disc Pump™ enables further reductions in size and complexity. The silent, vibration-free nature of the pump that follows from its ultrasonic operation helps to improve user experience, particularly in continuous monitoring and wearable applications.