Our company's main products are H50ps series pressure controller, H20ps (M) series pressure controller.Company products are widely used in the vast majority of air conditioning and heat pump water heater fields.We received customer praise many times and win the honor of quality. We are the quality of the unit.Company’s products through the CCEE certification, CQC certification, ISO9002 international certification, ISO9001:2000 version of the certification.In 1999, H20ps series pressure switch through the United States UL certification, thus opening the international market.