HK-258 Portable Trace Dissolved Oxygen Analyzer, 0-20 mg/L (CAT#: STEM-AL-4139-ZJF)

HK-258 Portable Trace Dissolved Oxygen Analyzer is designed for laboratory or field analysis of dissolved oxygen. The instrument measures dissolved oxygen using the analytical or process method documented for the model. The documented operating or measurement range is 0-20 mg/L. Electronic control manages measurement, calculation, and display functions. The interface presents live readings, settings, and available status information. Specified analog, relay, or digital interfaces support integration with external systems where provided. Temperature compensation, calibration, alarm, cleaning, or storage functions are applied according to the model configuration. The sample path, sensor, or reaction module is arranged for the stated online, laboratory, or portable workflow. The instrument supports repeatable analysis within the documented sample and environmental limits.

Model: HK-258
Measurement Range: (0-20)µg/ L, (0-200)µg/ L, (0-20)mg/ L(automatic)
Resolution: 0.1µg/ L、0.01mg/ L
Basic Error: ±0.3%FS1µg/ L (whichever is greater)
Temperature Compensation Range: (0-50) °C(manualautomatic)
Display: LCD
Power Supply: DC3.7V(integrated)
Temperature Accuracy: ±0.5 °C
Response Time (T90): ≤60s(25 °C)
Storage Temperature: (-20-55) °C(electrode, electrode0 °C)

Digital display presents measurement values and operating status
Temperature compensation supports measurement under changing sample conditions
Data storage or export functions support traceable result management
Portable or battery-supported configuration enables field operation
Protected enclosure supports the stated industrial or outdoor environment
Purification stages support production of source-specified high-purity water
Source-defined measurement or operating range supports the intended workflow