The DDB-411 is a portable conductivity meter with a 3.5-inch color TFT touchscreen, measuring conductivity (0.05 μS/cm to 200.0 mS/cm), resistivity, TDS, salinity and temperature. Features three-level user management, 1500-point data storage, GLP printing and USB Type-C connectivity. Powered by a rechargeable lithium battery. Compact at 170×80×30 mm, 0.3 kg.
The DDB-411 portable conductivity meter brings full multiparameter measurement capability to the field. In a compact 170×80×30 mm body weighing just 0.3 kg, it measures conductivity, resistivity, TDS, salinity and temperature with the same core specifications as the DDS-401 benchtop model — packaged for on-site use with a 3.5-inch color TFT touchscreen, rechargeable lithium battery and USB Type-C charging.
Unlike simpler portable conductivity testers, the DDB-411 includes a comprehensive feature set typically associated with benchtop instruments: three-level user management, 1500-point data storage, GLP-compliant printing and a built-in operation manual accessible via the “?” function. This makes it suitable not just for field spot-checks, but for regulated sampling programmes where data traceability and operator accountability are required alongside portability.
Automatic frequency and range switching and auto temperature compensation from -5.0°C to 110.0°C via the included T-820D probe ensure accurate readings across different sample types and environmental conditions. The DDB-411 is suited to water quality field sampling, environmental compliance monitoring, industrial process checks and any application requiring reliable conductivity data away from the laboratory bench.
| Model | DDB-411 | |
| Measuring Range | Conductivity | 0.05 μS/cm – 200.0 mS/cm |
| Resistivity | 20.00 Ω·cm – 2.000 MΩ·cm | |
| TDS | 0.000 mg/L – 2000 g/L | |
| Salinity | 0.00 – 8.00 % | |
| Temperature | -5.0 ~ 110.0 °C | |
| Accuracy (±) | Conductivity | ±1.0% FS |
| Resistivity | ±1.0% FS | |
| TDS | ±1.0% FS | |
| Salinity | ±0.1% | |
| Temperature | ±0.2 °C | |
| Included Sensor | DJS-1N (black) + T-820D | |
| Optional Sensors | DJS-0.01 / DJS-0.1 / DJS-1 (bright) / DJS-10 | |
| Electrode Connector | BNC / RCA | |
| Display | 3.5″ Color TFT Touchscreen | |
| Electrode Holder | — | |
| Temperature Compensation | (-5.0 ~ 110.0) °C Auto / Manual | |
| Calibration | 1–3 point standard solution / Electrode constant | |
| Standard Solutions | 146.5 μS/cm / 1408.3 μS/cm / 12.852 mS/cm / 111.31 mS/cm | |
| Data Storage | 1500 data points | |
| Connectivity | USB Type-C | |
| Printing | GLP-compliant format | |
| User Management | Password protected, 3 levels | |
| Date / Time | Yes | |
| Prompt Tone | On / Off | |
| Power Supply | DC 5V Lithium battery | |
| Operating Temperature | 5°C ~ 40°C | |
| Relative Humidity | ≤80% | |
| Dimensions (mm) | Approx. 170 × 80 × 30 mm | |
| Weight (kg) | 0.3 | |
The DDB-411 is the portable version with a 3.5-inch touchscreen, rechargeable lithium battery, USB Type-C connectivity and three-level user management. The DDS-401 is a benchtop instrument with a traditional LCD display, RS232-only connectivity and no data storage or user management. Both measure conductivity, resistivity, TDS, salinity and temperature over the same range. Choose the DDB-411 for field use or when portability and data traceability are both required; choose the DDS-401 for fixed benchtop laboratory use with a traditional interface.
The DDB-411 is powered by a built-in rechargeable lithium battery (DC 5V) charged via the USB Type-C port. Battery life depends on display brightness, measurement frequency and backlight use. The same Type-C port is used for both charging and data transfer to a PC.
Yes. The DDB-411 supports GLP-compliant real-time and stored data printing via USB Type-C connection to a compatible printer. All printed records include date, time and operator ID for full data traceability. This makes it suitable for regulated field sampling programmes where hard-copy documentation is required on site.
The included DJS-1N (black, cell constant 1.0) covers 2–20000 μS/cm and suits most standard water quality applications. For low-conductivity samples below 2 μS/cm, use the optional DJS-0.1 electrode. For high-conductivity industrial process samples above 20000 μS/cm, use the optional DJS-10. Contact us for guidance on electrode selection for your specific sample type.
Yes. The combination of three-level user management with password protection, 1500-point data storage with date and time stamps, GLP-compliant printing and USB Type-C connectivity makes the DDB-411 well suited to regulated field sampling environments where operator accountability and data integrity are required alongside portability.
The DDB-411 is a full-featured portable instrument with a 3.5-inch touchscreen, data storage, GLP printing and user management. The DDB-11A, DDB-1 and DDB-2 are compact handheld meters with basic LCD displays, no data storage, no printing and simplified operation. Choose the DDB-411 for professional field use with data management requirements; choose the smaller handheld models for basic indicative conductivity readings where portability and simplicity are the priority.
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