Yongwangda Instrument and Meter of Qingdao is professionally engaged into flowmeter (electromagnetic flow meter,vortex shedding flowmeter,oval wheel flowmeter),thermometer,pressure instrument,display instrument,thermoelectric pair .Especcilly for water treatmentindustry ,including electromagnetically operated valve ( streaming electromagnetically operated valve, water electromagnetically operated valve,gas electromagnetically operated valve ,plustic electromagnetically operated valve ,underwater electromagnetically operated valve,impulse electromagnetically operated valve,high tempreture and pressure electromagnetically operated valve ,resistivity meter.