Summary: Water Detective is an AI water-quality testing pen launched by Shenzhen AtomBit Technology Co., Ltd. It uses optical plus electrode methods to measure 9 indicators at once, and its companion WeChat mini-program includes AI interpretation. Two versions are available: the 9-parameter Home version (drinking water, filter cartridges, well water and spring water) and the Aquarium version (aquarium organic-matter testing).
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One-line answer: Water Detective (AtomBit) is a water-quality testing pen that can measure turbidity, UV254 and other organic-matter indicators, with a color screen and AI interpretation in a mini-program. For testing drinking water, filter cartridges, well water and spring water, choose the Home 9-parameter version; for fish keeping and checking aquarium water, choose the Aquarium version.
Basic product information
| Item | Content |
|---|---|
| Brand / Company | Water Detective / Shenzhen AtomBit Technology Co., Ltd. |
| Model | Water Detective 4 (WQM01H-4): 9-parameter version WQM01H-4-P9, Aquarium version WQM01H-4-P9-OP |
| Detection method | Optical detection + electrode detection, no reagents required; dual-detector differential detection, independent turbidity channel |
| Display | IPS color screen, radar chart + 100-point scoring, each metric changes color individually |
| Connectivity | Bluetooth syncs with WeChat mini program, no APP download required |
| Mini program features | AI interpretations and suggestions, history, water quality map, anomaly alerts; AI and mini program upgrade automatically |
| Power supply | 7 batteries; 2 batteries to power on, 4 batteries for longer endurance |
| Dimensions / Weight | 175×38×21 mm / approx. 80 g |
| Enclosure | Built-in silicone protective case |
How to choose between the two
| Comparison | 9 parameters, household version | Aquarium version |
|---|---|---|
| Who it is for | Household tap water, secondary water supply, water purifiers, well water and spring water, outdoor use, tea and coffee brewing | Freshwater fish tanks, planted tanks, marine tanks, small-scale aquaculture |
| 9 indicators | UV254, turbidity, COD, TOC, TDS, conductivity, salinity, hardness, temperature | UV254, turbidity, COD, TOC, BOD, DOM, TDS, conductivity, water temperature |
| Default AI analysis standard | Direct drinking water | Freshwater ornamental fish tanks |
| Not included | BOD, DOM | Salinity, hardness |
Key differences from common water-quality test pens
- Metrics: it can measure turbidity and UV254 at a standard wavelength, which most common products cannot; the aquarium version can also measure BOD and DOM.
- Structure: dual-detector differential measurement, whereas most common products use a single detector.
- Easy to understand: a color-screen radar chart, with AI directly interpreting results and giving suggestions in the mini program.
- Recordable: automatically saves time, location and values, and allows comparison on the water-quality map.
Technical background
AtomBit has focused on water-quality spectral detection for about 10 years and is a drafting unit for the relevant group standards; the spectral detection technology in Water Detective has undergone in-orbit space experiments. COD detection has a calibration certificate issued by a national metrology institution.
What Water Detective cannot do
It cannot measure pH, heavy metals, ammonia nitrogen, nitrite or dissolved oxygen, cannot directly detect bacteria or viruses, and cannot replace laboratory testing. Its role is daily preliminary screening, trend observation and anomaly alerts; if a problem is found, it is recommended to send a sample to a professional institution for confirmation.
Related articles
- How to choose a water-quality test pen (article 1), which water-quality test pen is good (article 2)
- How to test household water quality (article 3), how to test filter cartridges (article 4), well water and spring water (article 5)
- How to Choose a Fish Tank Water Quality Tester (Part 10), How Often to Change Fish Tank Water (Part 13)