Beijing Jinghai Zhengtong Technology Co., Ltd. is a mechanical and electrical integrated public company engaged in import and export business, operating various non-destructive testing instruments, gas detectors, smoke analyzers, water quality analyzers, building and highway detection instruments, etc. Our company adheres to the principle of "success comes from quality, quality comes from service". To provide high-quality products, good prices, and comprehensive services for domestic users. Our company's main products are as follows: toxic gas detector, combustible gas detector, composite gas detector, oxygen detector, formaldehyde detector, dust detector; Hardness tester, ultrasonic thickness gauge, roughness gauge, coating thickness gauge, thermometer, load cell, noise meter, tachometer; Acidity meter, dissolved oxygen tester, conductivity meter, COD analyzer, BOD analyzer; Total station, theodolite, anchor rod puller, crack width gauge; Telescopes, night vision devices, etc.