Online TSS Water Analyzer

Vasthi Instruments are global leaders in manufacturing of Online TSS Water Analyzer and have been supplying instruments to customers worldwide, Our multidisciplinary team of scientists, physicians, engineers, and regulatory consultants with decades of global experience brings you the quintessential mechanism that provides complete safety accuracy and durability.

Vasthi Instruments was formed with visionary thinking and innovative ideas resulting in innovative products and solutions. We enhance our product quality by the continuous process of research and development. We have WIDE range of models to suite various site conditions and processes.

Water Analyzer-VEMS-4000


Online TSS Water Analyzer VEMS-4000 that provides digital sensor technology and covers Dissolved Oxygen, Total Suspended Solid(TSS), Liquid Density and Conductivity measurements. Online TSS Water Analyzer adopts the pulse xenon lamp as light source and the ultraviolet optical fiber spectrometer as detector is capable for real-time gathering of absorption spectrum of water pollutants ranging from 200nm to 800nm and real-time analysis of the content of water pollutants by means of chemometric algorithm technology. Online TSS Water Analyzer includes two parts: the control box and the probe. The control box is installed in the analysis cabin and the probe is submerged in the water and fixed by means of mounting bracket the two parts are connected via cable. The control box provides power supply to the probe and at the same time receives the measurement value from the probe and displays them on the interface.



  •  It requires no reagents, so it can save operating costs and will cause no secondary pollution
  • The response is quick (about 2 seconds). It is suitable for the occasion where high real-time performance is required, such as industrial process analysis
  • Free from the interference of chloride ion
  • It adopts full-spectrum measurement and chemometric algorithm analysis, which in comparison with the simple dual wavelength background subtraction technology, can measure more parameters and is less likely to be influenced by the compositional change of waste water
  • All components are independently researched and developed
  • It adopts pulse blowing method to clean the pollutants on the two window surfaces.

The instrument probe in the water measures organics in the water by means of xenon lamp. The calculation of spectrum obtained after each measurement will produce a measured value, which will be transmitted to the control box and displayed

  • Optical fiber on the main interface. One measurement only takes several dozens of seconds. Meanwhile, in the interval of measurement, the instrument will be automatically cleaned to prevent contaminants from being deposited on the surface of the lens
  • Model: V.WATER – 8001


Measuring Parameters COD, BOD, UV254, Nirate, TOC, DOC, Turbidity, TSS, Color, etc.
Measuring Range As Customer required
Method UV/visible differential optical absorption spectroscopy, wavelength range 200-800nm
Power 230V AC, 30w
Linearity 2% F.S.
Zero drift <1% F.S.
Range (COD) 0-50-200mg/l, greater range can be customized
Interval The shortest 60 seconds, the cycle can be set
Probes Depth <10m
Optical Path Can be adjusted according to the site condition
Working Temperature 5°C – 45°C
Enclosure Rating IP65 (secondary instrument)
Auto-cleaning Auto-cleaning
Interface RS232/RS485 (Baud rate can be set), 2×4 -20ma output
Probe Size 60*380.55mm
Probe Weight 5kg
Interface digital Ethernet (TCP/IP), RS-232 or RS-485 (Modbus RTU)
Power Supply 12-24 VDC (±10%)
Output data
Power consumption Power consumption
Environmental conditions
Sample temperature +2…+40 °C
Ambient temperature +2…+40 °C
Inflow velocity 0.1-10m/s
Performance Characteristics
Maintenance effort Typically < 0.5 h/month
Calibration/ maintenance interval 24 months
System compatibility Modbus RTU
Guarantee 1 year (EU:2year)
Max. pressure with sub Conn 30 bar
Max. Pressure with fixed cable 3 bar
Max .pressure in flow cell 1 bar,2-4 L/min
Protection type IP 68
Structural design
Housing material Stainless steel (1.4571/1.4404)or titanium(3.7035)
Weight Stainless steel ~3kg (with 10mm path)
Weight titanium ~3kg (with 10mm path)