Handheld Water Permanganate Index Meter

I. Product Overview

This product is a handheld permanganate index measuring system designed for rapid on-site determination of the overall organic pollution level of water. The system consists of a handheld main unit and a multi-function accessory case: the main unit is light and easy to carry and integrates a dedicated optical channel with a smart operating system, while the smart digester in the accessory case provides the heating and digestion step required for sample pre-treatment. The split design combines on-site flexibility with the rigour of the national standard method.

II. Measuring Principle

The measuring principle strictly follows the spectrophotometric method specified in GB/T 5750.7-2023. In the accessory-case digester, 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 handheld main unit measures the absorbance of this complex at 470 nm and applies the Lambert-Beer law with its built-in standard curve to calculate the permanganate index.

III. Applications

Routine monitoring and evaluation of the organic and reducing-substance pollution level of relatively clean water bodies, including 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; the meter is also used for on-site emergency monitoring of sudden water pollution incidents and mobile surveys of field water bodies.

IV. Key Features

1. Android operating system with an elegant interface and user-friendly operation.

2. 4.3-inch high-definition touch screen combined with a visual graphical interface that greatly improves operating efficiency.

3. High-reliability imported LED light source: no warm-up required and stable long-term performance.

4. 10 mm × 10 mm large-area photocell for high sensitivity and a low detection limit.

5. 16 GB internal memory stores more than 10,000 records; an optional Bluetooth printer prints results on site.

6. Wi-Fi and Bluetooth connectivity plus a USB port for fast batch upload of data to a PC.

7. Water-resistant housing; the measuring chamber resists the ingress of 0.5 mL of liquid.

8. Standard USB-C 5 V 2.1 A input with BC 2.1 charging protocol support: compatible with third-party phone chargers, cables and power banks, with intelligent lithium-battery charge management for continuous mains operation.

9. Bilingual Chinese / English operating system.

V. Technical Parameters