Dark matter is also in the process of being detected via underground detectors (to prevent noise from cosmic rays).

Others have been detected via gravitational microlensing, for which only the mass ratio between the planet and the parent star is known.

Nail bombs can be detected via electromagnetic sensors and standard metal detectors.

Hydromorphone is most commonly detected via blood and urine testing.

It is often detected via spectroscopy in extraterrestrial bodies, including comets and certain stars.

The pulses are detected via induction by a sensor hanging a few inches above the rail before the leading set of wheels.

When a ship is cloaked, it can only be detected via tachyon detection.

Neutral hydrogen clouds are detected via the 21 cm emission line.

Similarly, such films could allow military aircraft to shield their electromagnetic "signatures", which can be detected via radar.

Still's murmur is detected via auscultation with a stethoscope.