Brand：Erun  
Water Quality Calcium Lon Online Sensor
Model：ERUN-M7B
This product is a new type of online water quality calcium ion sensor independently developed by ERUN Group. It has the characteristics of high stability, high precision, etc., can automatically detect temperature and perform automatic temperature compensation, and can accurately measure the calcium ion value and temperature value in the solution. It is widely used for continuous real-time monitoring of calcium ions in sewage, drinking water, boiler water, aquaculture water and biological medicine industries.

Brand：Erun  
Online Ammonium Ion Water Quality Sensor

Model：ERUN-M4A 

Brand: Erun
Online Monitoring System for Surface Runoff from Agricultural Surface Pollution
Model: ERUN-SZ
Parameters: ph, conductivity, dissolved oxygen, COD, etc.

Brand: Erun
Laboratory water quality monitor for agricultural surface pollution
Model: ERUN-ST7-5
Parameters: Total Nitrogen, Nitrate Nitrogen, Ammonia Nitrogen, Total Phosphorus, Phosphate