Portable Water Total Phosphorus Meter

I. Product Overview

The instrument is an integrated portable total phosphorus analyser based on the national standard ammonium molybdate spectrophotometric method. It is a dedicated, reliable device integrating high-temperature digestion, optical measurement and smart data transmission. The built-in multi-wavelength optical system optimised for total phosphorus supports both the phosphomolybdenum yellow and phosphomolybdenum blue colorimetric methods, so the user can choose according to sample concentration and requirements, balancing a wide measuring range with high sensitivity. With the dedicated pre-made reagent pack, digestion and measurement are completed with one key press and the total phosphorus concentration is read directly.

II. Applicable Standards

1. GB/T 11893-1989 Water quality — Determination of total phosphorus — Ammonium molybdate spectrophotometric method

2. HJ 671-2013 Water quality — Determination of total phosphorus — Flow injection-ammonium molybdate spectrophotometric method

3. HJ 670-2013 Water quality — Determination of phosphate and total phosphorus — Continuous flow-ammonium molybdate spectrophotometric method

III. Measuring Principle

Total phosphorus is determined by the national standard ammonium molybdate spectrophotometric method. The procedure has two core steps. First, in the built-in high-temperature digestion module the water sample is digested together with an oxidising agent such as potassium persulfate, converting all forms of phosphorus (organic phosphorus, orthophosphate and others) entirely into orthophosphate. Second, two established colorimetric options are provided: 1. Phosphomolybdenum yellow method — orthophosphate reacts directly with ammonium molybdate in an acidic medium to form a yellow phosphomolybdenum heteropoly acid complex, measured at 420 nm. 2. Phosphomolybdenum blue method — a reducing agent such as ascorbic acid is added to reduce the yellow complex to a more sensitive blue complex, measured at 700 nm. The high-precision optical system measures the absorbance and, following the Lambert-Beer law, automatically applies the stored standard curve to calculate the total phosphorus concentration directly.

IV. Applications

The instrument is dedicated to determination of total phosphorus and is used wherever phosphorus discharge must be controlled and eutrophication risk assessed. In wastewater treatment it is the core instrument for monitoring the efficiency of chemical or biological phosphorus removal and ensuring compliant total phosphorus in the effluent of municipal and industrial treatment plants. In environmental water monitoring it is widely used for routine eutrophication monitoring, trend analysis and early warning of lakes, reservoirs and rivers. For supervision and enforcement it is used for on-site rapid screening and compliance checks of agricultural diffuse sources, urban runoff and industrial outfalls. It is also suitable for aquaculture and laboratory research.

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