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