Particle detector and Spark counter

Particle detector noun - A chamber in which particles can be made visible.

Spark counter and particle detector are semantically related. In some cases you can replace phrase "Spark counter" with "Particle detector", this phrases are similar.

Spark counter noun - An instrument that detects ionizing radiation from elementary particles.

Particle detector and spark counter are semantically related. You can use "Particle detector" instead a noun phrase "Spark counter".