TEL:+86 0571-28993551
Conventional Pollution Online Monitoring Instrument
Total Phosphorus and Nitrogen Online Monitor
product details

Product model: TPN-8000


Measurement Methods


Potassium persulfate oxidation UV-VIS spectroscopy.

A variety of options can be realized:

timing measurement can be realized every day at any time the user wants to monitor the instrument to start measurement;

Isochronous measurement can automatically start the instrument for measurement every few hours at a fixed time interval every day;

Continuous measurement can realize automatic sample measurement one by one, which can be used for product acceptance and related technical certification;

Manual measurement can realize the user to start the measurement at any time, and can be used for field experiment comparison and equipment installation and debugging.


Product Overview


TPN-8000 total phosphorus and total nitrogen online monitor can simultaneously measure total phosphorus and total nitrogen in water with one instrument on line. Its working principle is that the water sample to be measured is digested at high temperature and high pressure in the presence of strong oxidant, and various nitrogen and phosphorus compounds in the water sample are oxidized and digested into nitrate and phosphate. The absorbance of the reaction products was measured by UV photometry to obtain the total nitrogen content in the sample. Total phosphorus by adding molybdate, the depth of the color of the solution is proportional to the total phosphorus content in the water sample, and the absorbance value of the reaction product is measured by photometry.


Technical Parameter


Measurement range: total phosphorus measurement range: (0-10) mg/L;
Total nitrogen measurement range: (0-50) mg/L;
Measurement accuracy: <10%;
Measurement repeatability: <5%;
Zero drift: ±5%;
Range drift: ±10%;
MTBF (trouble-free running time) : ≥720 h/ time;
Actual water sample comparison: ±10%;
Measurement time: 30-120min can be adjusted, generally 40min;
Reagent consumption: only 2mL of reagent is consumed per measurement;
Data transmission: it can provide 4-20 mA and RS232 data transmission interfaces at the same time;
Ambient temperature: +5°C to +40°C;
Host size: 590×700×360mm;
Weight: about 35kg;
Power supply: (220±20) VAC /(50±0.5) Hz;
Power consumption: about 100W (excluding sewage pump).

System Features


· Maintenance Free Design

The water sample pre-treatment device adopts a maintenance free design, which can ensure that the maintenance cycle of the pre-treatment device exceeds six months;


· Chemical Digestion Time Can Be Adjusted

The chemical digestion time can be adjusted, and the measurement process and results meet relevant standards;


· Adjustable Quantitative Sampling Device

Ensure that the instrument accurately measures various water samples by adjusting the reagent dosage and sampling amount;


· Non Contact Injection Pump

The use of reagents adopts a non-contact injection pump to avoid direct corrosion of the reagent pump, which can extend the service life of core components and reduce user usage costs;


· All Imported Devices

The analysis of flow path design and reagent formulation ensures measurement reproducibility, with a current measurement reproducibility of up to 5%;


· Fully Automatic Operation

No need for personnel on duty, it can achieve intelligent functions such as automatic zero adjustment, automatic calibration, automatic measurement, automatic cleaning, automatic maintenance, self-protection, and automatic recovery;


· Diversified Online Monitoring Methods

It can achieve measurement methods such as manual measurement at any time, automatic timed measurement, and automatic periodic measurement;


· Leakage Reminder Function

When there is a reagent leak, the instrument automatically prompts the user to perform maintenance.