泰州市正大科教仪器设备厂（原姜堰市正大科教仪器设备厂）成立于1998 年。"正大仪器ZD instrument"是泰州市正大科教仪器设备厂完全独立拥有的自主品牌。
主要产品有：酸碱度计、电导率仪、土壤酸碱度和湿度检测仪、土壤酸碱度速测仪、土壤温度&水份检测仪、土壤盐分速测仪、土壤速效氮（N）、磷（P）、钾（K）检测仪、土壤重金属速测仪、 土壤微量元素检测仪、品牌“Nutra Wand”水栽培营养检测仪、挂壁式水栽培营养在线监视器及各类配套的传感器等，远销全球三十多个国家和地区。
ZD Instrument(Taizhou Zhengda Science and Education Equipment Factory) was established in 1998.“ZD Instrument" is a completely independent brand owned by Taizhou Zhengda Science and Education Instrument Equipment Factory.
ZD Instrument（Taizhou Zhengda Science and education Equipment factory) is a private science and technology enterprise in Jiangsu Province integrating research and development, design, manufacturing, sales and service. After more than 20 years of perseverance, forge ahead, keep pace with The Times, strengthen the development of core technology, and realize the comprehensive innovation of soil testing methods. Now it has more than 20 independent intellectual property patented products, and is also one of the research bases specializing in the production of soil tachometer and electrochemical analysis instruments in China.
The main products are: Ph meter, conductivity meter, soil pH and humidity detector, soil pH quick meter, soil temperature & moisture detector, soil salinity quick meter, soil available nitrogen (N), phosphorus (P), potassium (K) detector, soil heavy metal quick meter, soil trace element detector, brand "Nutra. Wand "hydroculture nutrition detector, wall-mounted hydroculture nutrition online monitor and all kinds of supporting sensors are exported to more than 30 countries and regions around the world.
Testing is the basis of science and technology and the ruler of development. The accurate measurement of electrochemical analysis instruments and soil detectors has laid a solid foundation for the scientific development of modern agriculture, environmental protection, soil improvement and restoration, which is closely related to human life. Upholding "quality, integrity, service" is the core value of the enterprise. Adhere to the original heart, focus on quality, adhere to the pursuit, step by step, persevere, accumulate, build the dream of made in China, to show the strength of made in China in the world's science and technology stage. www.zdinstruments.com www.zdinstrument.com