Smarter Software for Advanced pH Measurement  

The OHAUS AquaSearcher™ benchtop meter has long been a staple for reliable pH measurements in laboratories worldwide. With the introduction of the AB33/41PH Sr1.08 software upgrade, OHAUS is elevating performance through refined algorithms and enhanced stability. This update is designed to make precision measurement more dependable than ever, specifically optimized for the OHAUS electrode portfolio.


 

What's New in the Sr1.08 Update & Why Upgrade? 

The Sr1.08 upgrade introduces fundamental improvements to the AquaSearcher platform by prioritizing data integrity and reproducibility. By integrating smarter algorithms and stricter stability criteria, the software ensures that hardware and software work in perfect harmony.  

• Smarter Algorithm Integration: New calibration and measurement protocols ensure that readings are only recorded when the sample has truly stabilized.  

• Reduced Erratic Results: By allowing electrodes more time to reach equilibrium, the software significantly minimizes fluctuating or "jumpy" data points.  

• Enhanced Performance Metrics: While calibration now takes approximately one minute longer, the trade-off is a substantial gain in data integrity:  

  • Consistent Slopes: Variance is maintained within a tight 2–3% range.  
  • Offset Control: Tighter control with offsets staying below 5 mV.  
  • High Dependability: Buffer readbacks vary by a mere 0.02 pH, while customer sample readings remain within 0.05 pH.  
  • Balanced Efficiency: The software prioritizes precision while maintaining the workflow efficiency expected of OHAUS instruments.  
  • Enhanced Traceability: With the 1,000-item memory and time/date stamps, the AB33PH remains fully compliant with GLP documentation requirements.  

Product Specifications: AquaSearcher AB33PH 

The AB33PH is a highly reliable, user-friendly benchtop meter designed for standard laboratory applications. It features a large 6.5-inch LCD display and a capacitive touch keypad, providing an interface as intuitive as a smartphone. 

Frequently Asked Questions (FAQ) 

Q: What is the i-Steward system mentioned in the update? 

A: The i-Steward is an intelligent monitoring system that tracks the condition of the electrode. It ensures that measurements remain repeatable and consistent by alerting the user to electrode performance trends or calibration needs.  

Q: Which electrodes are compatible with the AB33PH? 

A: The AB33PH is compatible with a wide range of OHAUS Starter™ electrodes. The standard kit often includes the ST310 3-in-1 plastic refillable electrode, but it can also be paired with specialized sensors like the STSURF (flat surface) or ST272 (puncture electrode for meat/cheese).  

Q: Does the update affect temperature compensation? 

A: The update enhances the overall measurement algorithm, which includes how the meter handles Automatic Temperature Compensation (ATC). Proper ATC is critical because pH measurements are highly sensitive to temperature changes, except at the isopotential point (pH 7).  

Q: How do I manage the data collected by the meter? 

A: The AB33PH stores up to 1,000 measurements with date and time stamps. This data can be exported to a PC or printer via the integrated USB and RS232 ports for professional documentation and analysis.  

Q: Is the Sr1.08 software specifically for the AB33PH? 

A: It is designed for the AB33/41PH series, optimizing the research-grade performance of both the AB33PH and the higher-resolution AB41PH bench meters.