Endress+Hauser offers users a wide range of liquid analysis products, from standard measuring sensors to complete water quality analyzers. Endress+Hauser has always regarded continuous innovation as an essential element of the company. In 2004, Memosens digital technology was officially launched, bringing a technological revolution. In 2015, Endress+Hauser extended the Liquiline platform concept to analyzers, once again inspiring the market. Analyzers such as the CA80AM, CA80COD and CA80TP subsequently launched have been widely used in wastewater monitoring and gained broad market recognition. The total nitrogen analyzer of the CA80 platform is also about to be launched and is currently in the field testing phase; it will soon be available to the public. Before the arrival of the CA80TN, the previous generation ZA80TN will continue to hold its position. Let us review the ZA80TN analyzer below.

Advantages
Alkaline potassium persulfate digestion UV spectrophotometric method
Matching pretreatment system with sampling and backflushing functions
Advanced diagnostics and preventive maintenance with pre-maintenance alarms and fault diagnostic information
Quantitative grating ensures measurement accuracy and repeatability
The analyzer enables automatic cleaning, automatic calibration, and automatic restart and draining after a power failure
Optional Chinese operating menu with a simple user interface
In addition to standard 4…20mA current output, supports Modbus RS485, RS232 and other communication methods

ZA80TN total nitrogen analyzer
The analyzer uses a photometric colorimetric measuring system for online monitoring of water and wastewater treatment. It meets high-precision total nitrogen measurement at all critical control points, and its measuring principle complies with national standard methods and has environmental protection approval. It enables automatic calibration and cleaning, and low reagent consumption saves operating and maintenance costs. Advanced diagnostics with remote access ensure process safety and provide users with process documentation for convenient process management.

Application areas:
Wastewater treatment plant inlet
Wastewater treatment plant outlet
Water treatment
Purification capacity of municipal and industrial wastewater treatment plants

Performance specifications:
Measuring range: 0...5 mg/L TN, 5...20 mg/L TN, 20...50 mg/L TN, 50...100 mg/L TN
Measuring accuracy: water sample < 1 mg/L, < ±0.5 mg/L; > 5 mg/L, < ±10%
Repeatability: water sample < 1 mg/L, < 0.2 mg/L; > 5 mg/L, < 10%
Detection limit: 0.2mg/L
Communication: 2x RS232, 1x 485 output
Relay output: 1 single-pole changeover contact (alarm relay), 2 single-pole changeover contacts
Analog output: 2x 4...20 mA output
Language: Chinese menu
Power supply: (220±22) V AC, (50±0.5) Hz, 10 A

Application case
Beijing Daxing International Airport, the world’s largest airport completed in June this year, was recently officially put into operation. Endress+Hauser is honored to be part of the intelligent construction of the new Beijing airport and to help it realize wastewater monitoring. Endress+Hauser’s online analysis of ammonia nitrogen, COD, total phosphorus and total nitrogen is used for real-time water quality monitoring, strictly ensuring the effluent quality and that the water discharged into the Tiantang River meets national requirements.

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Technical documentation

Measuring principle video