Handheld Water Ammonia Nitrogen Meter

I. Product Overview

The handheld ammonia nitrogen meter is designed for fast and accurate on-site determination of ammonia nitrogen in water. Highly integrated and easy to carry, the main unit combines a dedicated optical system, smart touch operation and data management, with both the Nessler reagent method and the salicylic acid method built in. Once the sample has been coloured with the dedicated pre-made reagent, a single key press gives a precise result.

II. Measuring Principle

The meter is based on spectrophotometry and strictly follows the national standard methods. Nessler reagent method: in a strongly alkaline medium, ammonia or ammonium ions react with Nessler reagent to form a pale reddish-brown colloidal complex, measured at 420 nm. Salicylic acid method: in an alkaline medium and in the presence of a catalyst, ammonium ions react with salicylate and hypochlorite ions to form a blue complex, measured with high sensitivity at 700 nm. The meter measures the absorbance of the coloured solution at the specific wavelength and applies the Lambert-Beer law with its built-in standard curve to calculate the ammonia nitrogen concentration directly.

III. Applications

Discharge outlet screening and process control in industrial wastewater such as chemical, pharmaceutical and aquaculture operations; influent and effluent monitoring and biochemical process control in municipal sewage treatment plants; and routine monitoring, enforcement checks and emergency monitoring of surface water, groundwater and drinking water sources.

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