ZHK6250Pro Fully Automatic BOD Analyzer

The ZHK6250Pro fully automated BOD analysis system is a professional, fully unmanned solution centered on the determination of biochemical oxygen demand in water, while also integrating a TOC analyzer, an autosampler, a conductivity meter, and other instruments to streamline the entire workflow—from sample injection to data output. Featuring key specifications such as 132 sample positions, an imported electrochemical dissolved oxygen electrode, and dual temperature-controlled zones, the system offers multiple advanced functions, including automatic optimization of the optimal sample dilution factor, automated sampling, and automatic salinity compensation. These capabilities comprehensively address common challenges in BOD testing, such as large errors in estimating wastewater dilution ratios, significant measurement deviations for high-salinity samples, and time-consuming, labor-intensive procedures.
The TOC analyzer enables rapid and accurate determination of TOC levels in a wide range of sample types, while the system also supports standalone TOC mode for independent data output. For applications involving high-salinity wastewater, estuarine water, seawater, and other similar samples, the conductivity meter provides real-time salinity measurements and automatically compensates dissolved oxygen readings, thereby further enhancing the accuracy of the analytical results.
In addition, the system is equipped with an autosampler that supports batch sample injection, reducing manual intervention while significantly enhancing both testing efficiency and result accuracy.
    Intelligent
·Fully automated preparation and mixing of dilution water throughout the entire process
·Automatic sample injection, automatic determination of dilution factor, automatic dilution, automatic temperature and oxygen control, automatic incubation, and automatic calculation
·Automatic calibration, automatic measurement, and automatic cleaning of the dissolved oxygen electrode; automatic power-off in standby mode to extend electrode lifespan.
·Supports direct data acquisition and seamless integration with Laboratory Information Management Systems (LIMS)
·Supports remote control of instruments via mobile phone
    Efficient
·The entire unit features a dual-zone constant-temperature design, with two independent cooling and heating temperature-control systems, ensuring the temperature is maintained at 20±1℃.
·The instrument features 60 sample positions and 72 offline culture positions, meeting the demands of high-throughput analysis.
·Supports non-dilution, non-dilution inoculation, dilution, and dilution-inoculation mixed operations, with automatic blank matching.
·Supports multi-batch automatic operation and allows for sample addition during the run.
·Features a cap-retention function to ensure sufficient equilibration time for samples after aeration; during this equilibration period, the instrument can continue processing the next sample, thereby enhancing testing efficiency.
·Equipped with an automatic aeration module and nitrogen/oxygen interfaces, it can automatically sparge and purge oxygen based on the current dissolved oxygen concentration of the sample, rapidly increasing the dissolved oxygen level in the solution to above 8 mg/L.
    Accurate
· Employs an imported electrochemical dissolved oxygen electrode that fully complies with national standards and supports temperature, pressure, and salinity compensation.
·Supports free switching among three detection modes: single BOD, single TOC, and BOD+TOC; TOC measurement is rapid and accurate, making it widely applicable to various wastewater analyses.
·All reagents are delivered using high-precision syringe pumps to ensure dosing accuracy.
·Adopts all-round spray cleaning technology, ensuring a safe and reliable experimental process with no cross-contamination.
    Safety
·Empty sample position detection, lid-opening failure detection, bottle-cap drop detection, and mechanical collision detection ensure safe and reliable operation.
·Reagent line blockage alarm, rotary valve not fully seated alarm, and insufficient reagent volume alarm
·Over-temperature alarm, temperature sensor failure alarm, and over-temperature protection to ensure experimental safety.