GROSTAR

Carbon dioxide feeders for treating water by automatically injecting a predetermined concentration of carbonic acid solution for pH control; Conductive silicone packing for electro-magnetic interference; Digital pH meters; Electronic-based instruments for measuring environmental parameters including humidity, mold, bacteria, air quality and water quality; Instruments for measuring milk quality parameters; Measuring apparatus, namely, clamp meters for measuring electricity; pH meters; Pressure test connectors for testing pressure of fluids in hydraulic or pneumatic systems; Scientific instrumentation for measuring weight and chemical levels in water; Scientific measuring instruments, namely, conductivity meters; Water meters