Portable multi-parameter water quality analyzer for field water quality sampling - AMT-101

# Portable Multi-Parameter Water Quality Analyzer

AMT-101 portable multi-parameter water quality analyzer is an instrument for **rapid on-site field water quality testing**, divided into two categories: **electrochemical electrode type** and **spectrophotometric colorimetric type**. It is portable/handheld, with built-in battery, no laboratory required, and can directly test water samples at rivers, sewage plants, and emergency sites.

## Two Major Types

### 1. Electrochemical Electrode Type (handheld probe, no reagents required)

**Can measure: pH, ORP oxidation-reduction potential, dissolved oxygen DO, conductivity, TDS, salinity, temperature, turbidity**, some can connect ion electrodes to measure ammonia nitrogen, nitrate nitrogen, chloride ions, etc.

- Principle: ion-selective electrode, directly immersed in water for reading, **no reagents, instant results**
- Advantages: fast speed, no consumables, suitable for continuous field monitoring;
- Disadvantages: cannot measure heavy metals, COD, total phosphorus, total nitrogen; electrodes require periodic calibration and are prone to contamination.

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> Representative: Hach HQd, YSI, Shanghai Leici, Sanxin

### 2. Spectrophotometric Colorimetric Type (requires pre-made reagents, some with digestion)

**Can measure: COD, ammonia nitrogen, total phosphorus, total nitrogen, total chromium, hexavalent chromium, residual chlorine, total chlorine, heavy metals and dozens of other indicators.**

- Principle: spectrophotometric method, water sample added with pre-made reagent for color development; COD/total phosphorus/total nitrogen require the instrument's built-in digestion module for high-temperature digestion, measuring absorbance to convert concentration, in compliance with national standard methods.
- Advantages: can measure the four conventional sewage discharge parameters, data meets environmental screening requirements;
- Disadvantages: consumes pre-made reagents, some items require digestion, taking several minutes.

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> Representative: Lianhua Technology, Suijing, Luheng, Tianer and other domestic portable digestion integrated machines

## Common Detection Parameters

1. Electrochemical five parameters: **pH, dissolved oxygen DO, conductivity, ORP, temperature** (mandatory for surface water and groundwater)
2. Sewage characteristic parameters: **COD, ammonia nitrogen, total phosphorus, total nitrogen (four sewage parameters)**
3. Others: turbidity, suspended solids, residual chlorine, total chlorine, nitrite, heavy metals (copper, zinc, lead, cadmium), etc.

## Main Features

1. Portability: carrying case/handheld, lithium battery powered, operates outdoors without mains electricity;
2. Data: large screen display, stores tens of thousands of data sets, USB export; high-end supports GPS positioning, 4G/Wi-Fi upload, on-site printing, photo evidence, suitable for environmental law enforcement emergency monitoring;
3. Protection: main unit IP67, electrode IP68 waterproof, usable in field rain;
4. Calibration: supports single-point/multi-point calibration, electrode models require periodic electrode calibration.

## Application Scenarios

- Environmental emergency monitoring, river/reservoir surface water inspection;
- On-site screening at sewage treatment plant outlets;
- Aquaculture, groundwater, drinking water rapid testing;
- Scientific research field sampling, environmental law enforcement on-site testing;
- Industrial wastewater on-site investigation.

## Selection Key Points

1. **Clarify needs**
- Only measuring basic physical and chemical parameters like pH, dissolved oxygen, conductivity: choose **electrochemical electrode model**, no reagents, fast;
- Need to measure COD, total phosphorus, total nitrogen: choose **spectrophotometric portable model with digestion**, need to purchase matching pre-made reagents.
2. Confirm whether the method complies with national standard HJ; for law enforcement scenarios, prioritize equipment with relevant certifications.
3. Consumable cost: electrodes need periodic replacement; spectrophotometric models consume pre-made reagents long-term.
4. Protection, battery life, data export, whether GPS, printing, cloud upload are needed.