Messages Us
  • Q

    How often is the sensor monitored and how often does the brush turn?

    A

    The monitoring frequency is based on the frequency of sending instructions. The default brush is once every six minutes.  

  • Q

    Why is three-point calibration for pH?

    A

    There are three points for PH calibration, which need to be calibrated according to the PH, such as 0-7 with 4 and 6.86 standard liquid calibration, 7-14 with 6.86 and 9.18 calibration.  

  • Q

    What is the difference between COD and BOD?

    A

    COD is chemical oxygen demand and BOD is biological oxygen demand.

  • Q

    The sensor does not have a display screen, so how does the data display?

    A

    Our sensor is 485 output, mainly for integration use, we also has upper computer can be used to display.  

  • Q

    Do you provide installation service? How much do you charge?

    A

    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.  

  • Q

    What sensors are available with interchangeable electrodes? Can I replace it by myself?

    A

    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.  

  • Q

    Can spectral COD measure seawater?

    A

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

  • Q

    4~20 mA output corresponds to the range

    A

    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).  

  • Q

    Why do multiple sensors from the same batch measure differently?

    A

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

  • Q

    CRC calibration code how to calculate?

    A

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

  • Q

    Is the turbidity value in COD accurate?

    A

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

  • Q

    What is the distance between the current output and the digital output, and will signal attenuation affect the measured value?

    A

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

Ask





    captcha