Fig. 1From: Optical measurement of tissue perfusion changes as an alternative to electrocardiography for heart rate monitoring in Atlantic salmon (Salmo salar)A (left): 1. Fixture rod, 2. Wire extensions for MAX86150 ECG electrodes, power connection and data transfer, 3. Threaded aluminium end piece, 4. MAX86150 biosensor module. B (right): 1. Epoxy cast with MAX86150 biosensor module, 2. ECG electrode extension leads, 3. Data and power supply extension leads, 4. MAX32630FTHR microcontroller board for wireless data transfer to PCBack to article page