Our company can provide free telephone to assist the installation, if the installation requires personnel to charge, the specific cost will be determined according to the site situation.  

At present, there is PH and ammonia nitrogen, which can be replaced by themselves, but it is not recommended for customers to replace by themselves.  

Can be measured offshore, deep sea ion interference is too large.

According to DDM-206A, for example, 0-70psu corresponds to 4-20Ma, that is, 4Ma corresponds to the range of 0PSU, and 20Ma corresponds to the range of 70PSU. The actual salinity value corresponding to MA value can be calculated by two linear correspondence.  The conversion formula is 70÷16×(actual MV value -4).  

Factors such as water flow and light source can cause numerical deviation.

Is standard CRC16 check code, there is a tool to calculate.

Turbidity in COD is still different from conventional turbidity, but the deviation is not big.  

Current output will lose due to the length of the cable, digital output as long as there is no loss in the transmission range.  

Horizontal installation of sensors other than COD is not recommended.

The liquid material is different for each product, and most of the material is POM.

Communication problem, please check the power supply, 485 line, and equipment.

MV Values and MA values.