div> Qingdao Ruidi Instrument Co., Ltd. is an enterprise integrating independent design, R & D, production and sales of various instruments and meters. Its main products include thermocouple thermometer, infrared thermometer, dew point meter, wet bulb thermometer, ultrasonic thickness gauge, hygrometer, sound level meter, roughness meter, gloss meter, reflectance meter, transmittance meter, coating thickness gauge and ultrasonic leak detector, Ultrasonic generator, moisture meter, water activity meter, whiteness meter, stroboscopic velocimeter, tachometer, illuminance meter, push-pull meter, color difference meter, density meter, paint film thickness meter, laser rangefinder and acre meter are widely used in electronic and electrical appliances, light industry and textile, building hardware, petrochemical industry, power machinery, heating and refrigeration, surveying and mapping, automobile manufacturing Metallurgical forging and other industries