03
2019-09
2007
our engineers were the first in our industry to overcome the difficulties in eddy current technology to raise nonlinearity of common displacement sensor to less than 0.2%（Chinese national standard is 1%）
2019-09-03
Our engineers were the first ones in our industry to successfully developed ZA-YD series piezoelectric vibration velocity / displacement sensor in April, 2007.
02
2008
The company's product ZA21 series two-wire eddy current sensor has passed the certification of high-tech products in Hunan Province. At the same time, Zhuzhou Zhonghang Technology Development Co., Ltd. was recognized as a high-tech enterprise.
2019-09-02
19
2013-02
News: Our New Application for Utility Model Patent Is Successfully Approved
On Apr. 15th, 2011, our patent certificate for “ZA-ZDT02 low-frequency vibration calibrator” was awarded. Patent No. is ZL 2011 20111602.6
2013-02-19
ZA-WT01 Multi-channel Digital Eddy Current Sensor Is Invented Successfully
Due to our aggressive innovation, we always take the lead in this industry. Our Technical Dept. successfully developed ZA-WT01 multi-channel digital eddy current sensor.
New Break-through : World’s First Embedded Eddy Current Displacement Sensor
After many years R & D, we finally resolve the problem that eddy current sensor probe is easily affected by metal nearby. We developed an embedded eddy current displacement sensor . In ZA21-Q embedded eddy current sensor, its head is completely embedded inside the metal shell so as to protect probes from damage caused by external forces.This technology greatly extends the lifespan of probes.