Portable Permanganate Index Meter

I. Product Overview

The instrument is an integrated portable permanganate index analyser based on the national standard spectrophotometric method. It is a dedicated, reliable device integrating high-temperature digestion, optical measurement and smart data transmission. A dedicated wavelength light source, preset standard curves and dedicated pre-made reagents allow the whole workflow from digestion to measurement to be completed with one key press.

II. Applicable Standards

1. GB/T 5750.7-2023 Standard examination methods for drinking water — Part 7: Comprehensive indicators of organic matter

III. Measuring Principle

The measuring principle strictly follows the spectrophotometric method specified in GB/T 5750.7-2023. In the built-in high-temperature digestion module the water sample is heated under acidic conditions with an excess of potassium permanganate standard solution for a defined time, oxidising the reducing substances. After digestion, the remaining potassium permanganate reacts with ammonium ferrous sulfate, and the excess ammonium ferrous sulfate forms a stable orange complex with the o-phenanthroline indicator. The high-precision optical system measures the absorbance of this complex at 470 nm and, following the Lambert-Beer law, calculates the permanganate index from the built-in standard curve.

IV. Applications

Monitoring of the organic and reducing-substance pollution level of relatively clean water bodies, covering drinking water sources, surface water such as rivers, lakes and reservoirs, and treated domestic sewage effluent. The index is a key rapid screening item for environmental monitoring stations, waterworks and water authorities for routine assessment, pollution trend warning and treatment effect tracking. The instrument is also used for on-site emergency monitoring of sudden water pollution incidents and mobile surveys of field water bodies.

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 with a 6-position cooling fan, independently controlled for rapid digestion and cooling.

3. Detection, digestion and cooling can run simultaneously, greatly improving efficiency.

4. Portable all-in-one design with a built-in high-capacity lithium battery: digestion and measurement can both be completed in the field.

5. Factory-prepared reagents: simply add the water sample to the tube to start the measurement.

6. Built-in thermal printer with automatic and batch printing, editable print content and QR code support.

7. Built-in instructional videos: users can follow the demonstration while operating, which makes learning much easier.

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

9. Data cloud platform that receives measurement data for online storage and short- and long-term trend analysis.

10. GPS positioning shows the longitude, latitude and landmark of the measuring point in real time; the position is saved with the data and can be uploaded to the cloud platform.

VI. Technical Parameters

Performance parameters

Physical parameters

Operating environment