Total Suspended Solids (TSS)

Total Suspended Solids (TSS) is a vital measurement for wastewater and certain industrial processes. Typically, TSS is monitored through periodic grab samples and a filter test performed by a skilled technician.

The LiquID Station provides real-time, effective, and continuous TSS measurement by optically measuring solids. The instrument hits the sample with light and multiple frequencies. The key to suspended solids measurement (as opposed to dissolved compounds) is non-specific absorption. This system uses frequencies known to have low or nil specific absorption from the common dissolved constituents of a wastewater matrix. This is used to isolate the absorptive properties of the solids. The rate at which light is non-specifically absorbed when passing through the fluid sample (pictured below) is one indication of the quantity of solids in the system.

In addition, the LiquID Station uses another optical technique based on reflectance which is used in many technical fields to characterize various types of solid particles. The combination of these measurement techniques – absorption spectroscopy and reflectance measurement – while using proprietary software analytics developed by ZAPS, allows for the repeatable and reliable continuous measurement of total suspended solids in a flow through system. Using these techniques, the LiquID Station produces a robust TSS measurement of wastewater, with a range of less than 1mg/L to over 5,000 mg/L, about every two minutes.

  • Parameter Detection Range/Sensitivity Accuracy
    Total Suspended Solids (TSS) 0.08 to 800 mg/L ±13%

  • To learn more about the optical approach used by the LiquID to measure TSS please read the How It Works – TSS located in the Library and Resources section of our website.

  • Case Study – Water Quality Insights Through Real Time Data
  • Please Contact Us if you have additional questions about measuring COD or general inquires into the LiquID Station.