The Endress+Hauser Viomax CAS51D is a digital sensor designed for optical measurement of nitrate, SAC (Specific Absorption Coefficient), and equivalents of various other parameters like COD (Chemical Oxygen Demand), TOC (Total Organic Carbon), BOD (Biochemical Oxygen Demand), and DOC (Dissolved Organic Carbon) in water.

Here are some key features of the Viomax CAS51D:

• Measurement principle: Ultraviolet (UV) photometric [2]
• Measurement range: 0.01 to 20 mg/l or 0.1 to 50 mg/l NO3-N (depending on configuration) [2]
• Applications: Suitable for drinking water, biological wastewater treatment, and wastewater treatment plant effluent [2]
• Benefits:
  • Continuous online measurement [1]
  • Chemical-free operation [1]
  • Low-maintenance due to self-cleaning design [1, 3]
  • Remote calibration capability [3]
  • Rugged stainless steel construction [2]
  • Memosens digital technology for secure data transmission [1, 3]

Overall, the Viomax CAS51D is a versatile and reliable sensor for monitoring nitrate and various organic matter parameters in water and wastewater applications.