Abstract: A flow cell can comprise a high-pressure, fluidic, flow-through housing that encloses and auto-aligns a heavy-walled, internally reflective low-cost glass capillary for concentrating and amplifying laser-excited spectra. The containment housing that encloses the capillaries can optionally sustain operational pressures of at least 10,000 psi. The pressure housing can be fitted with transparent optical windows that can accommodate laser-safe injection and spectra collection. The flow-cell design can adaptably accommodate different optical sampling configurations such as transmissive (forward scattering), reflective (backward scattering), or multipass, combined scattering. The flow cell size is scalable (lengthwise) to accommodate different applications or installations such as benchtop (lab), permanent (industrial), and portable (field).

Abstract: The disclosure describes devices for monitoring physiological activity (e.g., a pulse). These devices can include: a resonator configured to detect sound; an ultrasound system to detect fluid flow; an adhesive to attach a resonator to skin of a patient; an adhesive to attach a probe to skin of a patient; and a speaker to amplify or communicate detected sound or flow.

Abstract: The disclosure describes devices for monitoring physiological activity (e.g., a pulse). These devices can include: a detector configured to detect sound; an ultrasound system to detect fluid flow; an adhesive to attach a detector to skin of a patient; an adhesive to attach a probe to skin of a patient; and a speaker to amplify or communicate detected sound or flow.

Abstract: A flow cell can comprise a high-pressure, fluidic, flow-through housing that encloses and auto-aligns a heavy-walled, internally reflective low-cost glass capillary for concentrating and amplifying laser-excited spectra. The containment housing that encloses the capillaries can optionally sustain operational pressures of at least 10,000 psi. The pressure housing can be fitted with transparent optical windows that can accommodate laser-safe injection and spectra collection. The flow-cell design can adaptably accommodate different optical sampling configurations such as transmissive (forward scattering), reflective (backward scattering), or multipass, combined scattering. The flow cell size is scalable (lengthwise) to accommodate different applications or installations such as benchtop (lab), permanent (industrial), and portable (field).