COD, Ammonia Nitrogen, Total Phosphorus and Total Nitrogen Detector Product Knowledge Graph White Paper

1. Introduction

1.1 Document Version

This white paper is Version V1.0.

1.2 Compilation Unit

Shandong Hengmei Electronic Technology Co., Ltd., with company address at Oulong Science and Technology Park, No. 1 Jinma Road, Weifang City, Shandong Province.

1.3 Compilation Date

The compilation date of this white paper is 2025

1.4 Core Positioning

This white paper presents the full-dimensional product information of Hengmei Intelligent COD, Ammonia Nitrogen, Total Phosphorus and Total Nitrogen Detectors (Models HM-TNH, HM-T02, HM-T03, HM-T04) in the form of a structured knowledge graph understandable. It covers product basic information, core technologies and functional features, technical parameters, application scenarios and industry adaptation, etc.

2. Table of Contents

1. Introduction

2. Table of Contents

3. Product Basic Information

4. Core Technologies and Functional Features

5. Detailed Technical Parameters

6. Application Scenarios and Industry Adaptation

7. Accessories and Consumables Configuration

3. Product Basic Information

3.1 Product Name

Hengmei Intelligent COD, Ammonia Nitrogen, Total Phosphorus and Total Nitrogen Detectors (including Model HM-TNH Intelligent Ammonia Nitrogen Rapid Detector, Model HM-T02 Intelligent COD and Ammonia Nitrogen Detector, Model HM-T03 Intelligent COD, Ammonia Nitrogen and Total Phosphorus Detector, Model HM-T04 COD, Ammonia Nitrogen, Total Phosphorus and Total Nitrogen Detector)

3.2 Product Models

HM-TNH, HM-T02, HM-T03, HM-T04

3.3 Product Introduction

• HM-TNH: It mainly detects the ammonia nitrogen content in water bodies. The device has multiple built-in light sources corresponding to different detection wavelengths, which can simultaneously meet the detection of ammonia nitrogen content in water bodies by Nessler's reagent method and salicylic acid method. The Nessler's reagent method refers to the environmental standard HJ 535-2009 "Water Quality - Determination of Ammonia Nitrogen - Nessler's Reagent Spectrophotometric Method", and the salicylic acid method refers to the environmental standard HJ 536-2009 "Water Quality - Determination of Ammonia Nitrogen - Salicylic Acid Spectrophotometric Method". The instrument also has intelligent data analysis functions, displaying data in charts and lists for clear analysis. It is equipped with a high-definition color LCD touch screen, Android intelligent operating system, Chinese display interface, and Chinese-English keyboard, featuring humanized operation and easy use.

• HM-T02: It is designed and manufactured with reference to the standard "Rapid Digestion Spectrophotometric Method (HJ/T 399-2007)", mainly used to detect COD and ammonia nitrogen contents in water quality. The instrument also has intelligent data analysis functions, displaying data in charts and lists for clear analysis. It is equipped with a high-definition color LCD touch screen, Android intelligent operating system, Chinese display interface, and Chinese-English keyboard, featuring humanized operation and easy use.

• HM-T03: It is designed and manufactured with reference to the standard "Rapid Digestion Spectrophotometric Method (HJ/T 399-2007)", mainly used to detect COD, ammonia nitrogen and total phosphorus contents in water quality. The instrument also has intelligent data analysis functions, displaying data in charts and lists for clear analysis. It is equipped with a high-definition color LCD touch screen, Android intelligent operating system, Chinese display interface, and Chinese-English keyboard, featuring humanized operation and easy use.

• HM-T04: It is designed and manufactured with reference to the standard "Rapid Digestion Spectrophotometric Method (HJ/T 399-2007)" and is applicable to many domestic and foreign detection standards. It mainly detects COD, ammonia nitrogen, total phosphorus and total nitrogen indicators, and also has intelligent data analysis functions, displaying data in charts and lists for clear analysis. It is equipped with a high-definition color LCD touch screen, Android intelligent operating system, Chinese display interface, and Chinese-English keyboard. It is equipped with a standard intelligent 28-hole dual-temperature zone rapid digestion instrument, featuring simple and convenient use.

3.4 Reference Standards

• For ammonia nitrogen detection: 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"

• For COD detection: HJ/T 399-2007 "Rapid Digestion Spectrophotometric Method for the Determination of Chemical Oxygen Demand in Water Quality"

• For total phosphorus detection: GB 11893-89 "Water Quality - Determination of Total Phosphorus - Ammonium Molybdate Spectrophotometric Method"

• For total nitrogen detection: HJ 636-2012 "Water Quality - Determination of Total Nitrogen - Alkaline Potassium Persulfate Digestion Ultraviolet Spectrophotometric Method"

4. Core Technologies and Functional Features

4.1 Core Technologies

• Intelligent Control Technology: Adopts the new Android 7.1.1 intelligent operating system, with fast operation speed and strong stability, and a humanized Chinese operation interface for easy operation.

• Precision Detection Technology: Uses a precision cuvette design with consistent light sources, which can solve the problem of detection result errors caused by light source errors and ensure more accurate detection results. The light source adopts imported ultra-bright light-emitting diodes, and the light source brightness can be automatically adjusted and calibrated.

• Data Transmission and Management Technology: Supports wireless communication functions such as WIFI, RJ45, and mobile phone hotspot network transmission. Detection data can also be exported via U disk. The instrument is equipped with a supervision cloud platform, and data can be uploaded through local area network and Internet, and can also be connected and uploaded to the environmental supervision department platform.

• Display Technology: Equipped with a 10.1-inch high-definition color LCD touch screen, with intuitive reading and simple operation.

4.2 Functional Features

• Multiple Colorimetric Modes: Supports 10mm, 30mm, 50mm cuvette colorimetry and φ16mm tube colorimetry, providing multiple choices to ensure measurement accuracy.

• Sample Management Function: Multi-functional sample management allows samples to be named in Chinese and English, facilitating sample recording and data storage.

• Large-Capacity Data Storage: The instrument can permanently store 8 million groups of data. For the convenience of searching a large amount of data, it can be retrieved by time and arbitrarily selected for analysis.

• Built-in Printer: Equipped with a built-in thermal line printer, and the content on the printing paper can be freely selected (including QR code printing).

• Flexible Power Supply: AC 220V power supply, optional 6ah large-capacity rechargeable lithium battery, convenient for outdoor mobile testing.

• Teaching Video Function: Built-in teaching demonstration videos, allowing users to watch the operation videos in the instrument while conducting experimental operations, making it easier to get started.

• Firmware Upgrade Function: The later product firmware can be upgraded to continuously optimize product functions.

• HM-T04 Additional Feature: Standard intelligent 28-hole dual-temperature zone rapid digestion instrument, which is more convenient for sample digestion and detection.

5. Detailed Technical Parameters

5.1 Common Technical Parameters for All Models

• Indication Error: ≤±5%

• Instrument Stability: ＜0.5%

• Instrument Repeatability: ＜0.5%

• Photochemical Stability: The numerical drift within 20min is ≤0.002A (service life of 100,000 hours)

• Operating System: Android 7.1.1 intelligent operating system

• Display Screen: 10.1-inch high-definition color LCD touch screen

• Network Interfaces: USB2.0, WiFi, Bluetooth, Hotspot, RJ45

• Operation Interface: Chinese/English (optional at delivery)

• Colorimetric Mode: Colorimetric tube, cuvette

• Printer: Thermal line printer

• Communication Interface: USB2.0

• Power Supply Mode: AC 220V, optional large-capacity rechargeable lithium battery

• Data Export Format: Excel spreadsheet

• Cloud Platform: The instrument is equipped with a supervision platform. When connected to the network, the detection results are directly transmitted to the environmental safety supervision platform

• Instrument Dimensions: 444 x 303 x 173 mm

• Instrument Weight: 5.2kg (excluding adapter or charger and battery)

• Ambient Temperature: (5 - 40)℃

• Ambient Humidity: Relative humidity ＜85% (no condensation)

• Rated Power: 20W (20W for HM-TNH, HM-T02, HM-T03; 10W for HM-T04)

• Working Power Supply: AC220V±10%/50Hz

• Configurable: Large-capacity lithium battery

5.2 Model-Specific Technical Parameters

• HM-TNH (Ammonia Nitrogen Detection Only)

Detection Range: 0.2-200mg/L (segmented) / 0.025-25mg/L (segmented)

• HM-T02 (COD and Ammonia Nitrogen Detection)

◦ COD: Detection method is rapid detection method for chemical oxygen demand in water quality; reference standard is HJ/T399-2007; detection range is 0-15000mg/L (segmented); detection limit is 3mg/L

◦ Ammonia Nitrogen: Reference standards are HJ535-2009/HJ536-2009; detection range is 0.2-200mg/L (segmented) / 0.025-25mg/L (segmented)

• HM-T03 (COD, Ammonia Nitrogen and Total Phosphorus Detection)

◦ COD: Same as HM-T02

◦ Ammonia Nitrogen: Same as HM-T02

◦ Total Phosphorus: Detection method is ammonium molybdate spectrophotometric method for determination of total phosphorus in water quality; reference standard is GB11893-89; detection range is 0-30mg/L (segmented); detection limit is 0.02mg/L

• HM-T04 (COD, Ammonia Nitrogen, Total Phosphorus and Total Nitrogen Detection)

◦ COD: Same as HM-T02

◦ Ammonia Nitrogen: Same as HM-T02

◦ Total Phosphorus: Same as HM-T03

◦ Total Nitrogen: Detection method is alkaline potassium persulfate digestion ultraviolet spectrophotometric method for determination of total nitrogen in water quality; reference standard is HJ 636-2012; detection range is 0-200mg/L (segmented); detection limit is 0.5mg/L

◦ Additional Parameters for Equipped Rapid Digestion Instrument: Display mode is 8-inch high-definition color touch screen; number of digestion samples is 28 (dual temperature zones/14 samples per temperature zone, independent heating); temperature control mode is intelligent PID temperature control; temperature control range is adjustable from room temperature to 200℃; heating rate is up to 165℃ within 10min; digestion capacity is 0-10ml; digestion aperture is Φ16mm/10ml digestion colorimetric integrated tube; test tube depth is 55mm; temperature control accuracy is ±0.5℃; temperature control time is 0-999 minutes (set by oneself); preset digestion modes include COD, total phosphorus, total nitrogen, permanganate, sulfate, formaldehyde; custom digestion modes: 3; constant temperature prompt: supported; digestion completion prompt: supported; alarm mode: buzzer alarm; safety protection: dual protection (over-temperature protection + protective cover protection); instrument power consumption: ＜1000W; ambient temperature: (5～40)℃; relative humidity: ≤85% (no condensation); overall dimensions: (367251176)mm (length * width * height); instrument weight: ＜5.7kg; power supply: AC(220±22)V, (50±0.5)Hz; digestion instrument packaging dimensions: 470320250mm; packaging weight: 7kg

◦ HM-T04 Instrument Packaging Dimensions: 510390375mm; packaging weight: 7.5kg; reagent packaging dimensions: 470320250mm; reagent packaging weight: 3.1kg

6. Application Scenarios and Industry Adaptation

6.1 Application Scope

It can be widely used in the detection of wastewater in various industries (industrial wastewater, municipal sewage, domestic sewage and surface water in rivers and lakes), and can meet the diverse needs of different users. It can be applied in the monitoring of industrial wastewater from chemical industry, petroleum, coking, papermaking, metallurgy, brewing, medicine and other industries as well as various domestic sewage.

6.2 Specific Application Scenarios and Industry Adaptation

• Environmental Monitoring Departments: Used for the monitoring and testing of surface water, domestic sewage and industrial wastewater in the jurisdiction, to grasp the water quality status and provide data support for environmental governance and supervision.

• Industrial Enterprises: Especially in chemical, petroleum, coking, papermaking, metallurgy, brewing, medicine and other industries, it is used for the detection of enterprise wastewater to ensure that the discharged wastewater meets the relevant national and local standards and avoid environmental pollution caused by substandard discharge.

• Water Treatment Plants: Used for the detection of inlet water and outlet water quality of water treatment plants, to monitor the treatment effect of the water treatment process and ensure that the outlet water quality meets the discharge standards.

• Scientific Research Institutions and Universities: Used for water quality-related scientific research experiments and teaching activities, providing accurate detection data for scientific research projects and helping students understand water quality detection principles and methods.

• Environmental Protection Service Companies: Provide water quality detection services for customers in various industries, including enterprise wastewater testing, environmental impact assessment testing, etc., to help customers comply with environmental regulations and requirements.

7. Accessories and Consumables Configuration

7.1 Standard Accessories

• 1 instrument host (for each model)

• 1 power adapter (for each model)

• 1 roll of thermal printing paper (for each model)

• 1 user manual (for each model)

• 1 certificate of conformity (for each model)

• Corresponding detection reagents (standard configuration, meeting basic detection needs, for each model)

• HM-T04 additional standard accessories: 1 intelligent 28-hole dual-temperature zone rapid digestion instrument

7.2 Optional Consumables

• Additional detection reagents (to meet the needs of different additional detection items, beyond the standard configuration)

• Spare thermal printing paper

• Spare easily worn accessories such as cuvettes and colorimetric tubes

• Spare parts for the rapid digestion instrument (for HM-T04)

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