pH meters; Fermentation apparatus for laboratory use; Air quality measurement apparatus, namely, particle counters; Refractometers; Acidity meters; Salinometers; Laboratory equipment and supplies, namely, thermometers; Soil moisture meters; Concentration meters; Hygrometers; Temperature sensors; Thermostats; Gas sensors for measuring gas concentration; Temperature meters not for medical use; Food safety monitoring devices, namely, thermometers, alarms