Main business: multi-function thermometers, including but not limited to: long wave, short wave, anti-interference, anti-electromagnetic, waterproof, explosion-proof, dual colorimetric, high temperature resistant and other thermometers to adapt to customers’ different environmental temperature measurement needs. Independent research and development and mass production of: acceleration sensors, speed sensors, displacement sensors, force sensors, force hammers, vibrators, power amplifiers, signal conditioning series and other products.