WhaleTeq offers a series of optical PPG heart rate simulators for verifying HRM (Heart Rate Measurement) function of wearable device. The series includes HRS200, HRS100+ and  AECG100. The built-in photodiode can detect the optical signal from DUT LED and immediately trigger built-in LED to send optical signal with assigned parameters for DUT to detect, as the reflected optical signal of different skin tones. The optical signal can be adjusted by DC, AC and PI parameters with various waveform selections. On top of that, noise simulation and play-raw data capability would significantly assist user to verify DUT quickly and repeatedly.