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.

DDM, RDO, ZS confirm that there is no problem.  PH, NHN, ORP plasma selective sensors will slowly exude the reference solution, so try not to do this.  If you must test, after laboratory analysis, there is no problem, the exudation of ions are trace, does not affect health.  

The shell is basically POM, and 316L material is available at present.

PH is the same as residual chlorine, turbidity is a cylinder circulation pool, which will be treated to avoid light.  

If the conductivity is 0, it may mean that there is no contact with water, and if the COD is 0, it may mean that the turbidity is full scale. The specific sensor is 0, and the situation may be different. If it is encountered, please contact our after-sales service.  

Cables passing through 4-20mA will have loss, so there will be deviation on the value. 485 is not affected by the cable length, and 485 is the current trend.  Can be made 485 and 4~20mA two output mode.  

The difference between RTU and DTU is the same. DTU is a single and simple wireless transmission function, while RTU is a wireless acquisition and transmission equipment integrating multi-channel analog data acquisition and switching data control.  It can be understood that RTU has acquisition function and can send acquisition instructions to sensors.  DTU is only responsible for transmission, not active data collection.  

Yes, the minimum operating voltage is 9V and the maximum is 32V.

Secondary water supply mainly monitors residual chlorine, PH, turbidity and flow rate.  Scenario Secondary water supply and drinking water supply.