Following the COVID-19 pandemic, at-home blood oxygen monitoring has become a global priority in both clinical care and personal health management, driving widespread adoption of finger pulse oximeters.
At the same time, growing clinical evidence and international studies have highlighted that darker skin tones, low peripheral perfusion, and cold environments can cause pulse oximeters to produce systematic measurement error—sometimes resulting in apparently normal SpO₂ values despite actual hypoxemia. As a result, ensuring accuracy and consistency under real-world conditions has become a critical challenge in oximeter development.

In its review process and guidance for transmittance pulse oximeters, the FDA emphasizes performance evaluation under varying skin tones and low-perfusion (low-PI) conditions, and encourages test designs that better reflect real clinical use—supported by traceable and reproducible validation evidence. 
Consequently, the ability to reliably reproduce low-PI states and differentiated optical conditions under controlled settings, and to systematically evaluate measurement consistency, is essential to modern pulse oximeter testing.

Through close collaboration with leading manufacturers and R&D engineers, we identified a clear industry need for a single testing solution that applies to development, verification, and mass production—one that enables precise control of red (R) and infrared (IR) optical parameters, reliable low-PI simulation, and high-throughput consistency testing, all while improving traceability and shortening iteration cycles.
This insight led to the development of the PPG-2TF-660 2.0 Transmittance SpO₂ Module.

The PPG-2TF-660 2.0 allows engineers to freely configure AC and DC values, waveforms, frequencies, and amplitudes for both red and infrared channels, and to set PI values as low as 0.01%. This capability enables the realistic simulation of challenging conditions such as dark skin tones, cold environments, and compromised peripheral circulation, supporting the robust verification of oximeter stability and consistency.
In addition, the tester can automatically calculate device-specific red and infrared DC values and generate a custom R-curve, streamlining large-scale testing and quality verification. This ensures faster, more consistent workflows across R&D and production lines, while safeguarding measurement accuracy and long-term reliability.

We believe that only by grounding pulse oximeter testing in real clinical risks and regulatory expectations can manufacturers confidently validate performance across diverse populations and environments. The PPG-2TF-660 2.0 is designed to help achieve exactly that—serving as a reliable testing partner for manufacturers committed to accuracy, consistency, and patient safety.

Wide Testing Range to Meet Different Types of Finger Testing Needs

• Wide range of light intensity adjustment and dynamic light detection functions 
• Simulates signals of different fingers, built-in reflectance table　

Simulations that Are Closer to Time and Real Situations

 

• Built-in 14 types of ambient light signal superposition　
• Provides respiratory variation simulations

 

Customize or Load the Blood Oximeter R Curve for Quick Verification

• Quickly establish the R curve of the DUT to test the quality consistency and accuracy of the oximeter
• Provides R-curve examples of major brand manufacturers as reference for development

 

Software Development Kit for Flexible Development of Testing Program

• Users can develop automated testing software according to their needs to control the testing process, reducing the burden of repetitive operations during extensive testing