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2. Particle counter - Wikipedia

   en.wikipedia.org/wiki/Particle_counter

   The size and number of particles can determine if the liquid is clean enough to be used for the designed application. Liquid particle counters can be used to test the quality of drinking water or cleaning solutions, or the cleanliness of power generation equipment, manufacturing parts, or injectable drugs.

3. ISO 11171 - Wikipedia

   en.wikipedia.org/wiki/ISO_11171

   The particle counter determines the concentration and the size distribution of the particles. Therefore, the accuracy of the liquid particle counter has to be established through calibration. According to ISO 11171 for the primary particle-sizing calibration NIST SRM 2806 suspension [clarification needed] has to be used. In annex "F" of ISO ...

4. Coulter counter - Wikipedia

   en.wikipedia.org/wiki/Coulter_counter

   A typical Coulter counter has one or more microchannels that separate two chambers containing electrolyte solutions. As fluid that contains particles or cells is drawn through the microchannels, each particle causes a brief change to the electrical resistance of the liquid. The counter detects these changes in the electrical resistance.

5. Visible Light Photon Counter - Wikipedia

   en.wikipedia.org/wiki/Visible_light_photon_counter

   A Visible Light Photon Counter (VLPC) is a photon counting photodetector based on impurity-band conduction in arsenic-doped silicon. They have high quantum efficiency and are able to detect single photons in the visible range of the electromagnetic spectrum .

6. Time projection chamber - Wikipedia

   en.wikipedia.org/wiki/Time_projection_chamber

   Liquid argon is around one thousand times denser than the gas used in Nygren's TPC design, which increases the likelihood of a particle interacting in a detector by a factor of around one thousand. This feature is particularly useful in neutrino physics, where neutrino– nucleon interaction cross sections are small.

7. HCT Co., Ltd. - Wikipedia

   en.wikipedia.org/wiki/HCT_Co.,_Ltd.

   HCT Co., Ltd. is a South Korean compliance testing and equipment calibration company that also develops particle counters and antennas. Founded in 2000 as Hyundai Calibration & Certification Technologies Co., the company is a spin-off from Hyundai Electronics, the world's second-largest memory chipmaker.