Portable Water Quality Analyzer

I. Product Overview

This instrument is an integrated portable water quality analyser based on spectrophotometry, designed for the simultaneous rapid determination of chemical oxygen demand (COD) and ammonia nitrogen (NH₃-N). It integrates high-temperature digestion (for COD), optical colorimetric measurement and intelligent data management. An optical system and stored standard curves are built in, together with dedicated pre-prepared reagent kits for COD (potassium dichromate method) and ammonia nitrogen (Nessler's reagent / salicylic acid method). Digestion, reaction and measurement are completed with simple operations and the concentration is read directly. The integrated portable design, large-capacity battery and data interfaces make it ideal for wastewater treatment sites, environmental inspection patrols and field emergency monitoring — an efficient, professional dual-parameter testing tool.

II. Applicable Standards

HJ 535-2009 《Water quality — Determination of ammonia nitrogen — Nessler's reagent spectrophotometric method》
HJ 536-2009 《Water quality — Determination of ammonia nitrogen — Salicylic acid spectrophotometric method》
HJ/T 399-2007 《Water quality — Determination of chemical oxygen demand — Rapid digestion spectrophotometric method》

III. Measuring Principle

The instrument works on the principle of spectrophotometry, determining COD and ammonia nitrogen according to the respective national standard methods. COD: potassium dichromate high-temperature digestion spectrophotometry — the sample is completely oxidised by potassium dichromate in a strongly acidic medium inside the built-in digester, and COD is calculated from the change in absorbance of chromium ions at a specific wavelength according to the Lambert-Beer law. Ammonia nitrogen: Nessler's reagent or salicylic acid method — ammonia or ammonium ions in the sample react with the corresponding reagent to form a pale reddish-brown or blue complex; the instrument measures its absorbance at a specific wavelength and quantifies the concentration directly from the stored standard curve.

IV. Applications

The instrument is suitable for any scenario requiring simultaneous assessment of organic and ammonia nitrogen pollution. In wastewater treatment it is key equipment for monitoring process performance (especially the biological system) and ensuring that both effluent COD and ammonia nitrogen meet discharge limits. In environmental monitoring and management it can be used for routine patrols, enforcement inspections and emergency monitoring of pollution incidents in surface water, groundwater and river outfalls, quickly identifying the type and extent of pollution. It is also suitable for aquaculture water management, research experiments and self-inspection of wastewater outfalls in industrial enterprises such as food and chemical plants.

V. Key Features

1. Android 7.1.1 smart operating system for a smoother interactive experience, faster response and greater stability.

2. Built-in 6-position digester and 6-position cooling fan with independent control for rapid digestion and cooling.

3. Measurement, digestion and cooling can be carried out simultaneously, greatly improving efficiency.

4. Factory-prepared reagents are supplied: simply add the water sample to the tube.

5. Favourite parameters can be pinned to the top of the item list, avoiding repeated searching.

6. Portable all-in-one design with a large-capacity lithium battery: digestion and measurement can both be carried out in the field with a single instrument.

7. Built-in thermal printer supporting automatic and batch printing, freely selectable and editable print content, and QR-code printing.

8. Built-in instructional videos let users watch the procedure while operating the instrument.

9. Wi-Fi and 4G modules for wireless data upload.

10. Data cloud platform for online storage and short- and long-term trend analysis.

11. GPS positioning displays the longitude, latitude and landmark of the sampling point in real time; the coordinates are saved with the data and can be uploaded to the cloud platform.

VI. Technical Parameters

Performance parameters

Physical parameters

Operating environment