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Duotone panel — violet briefing on the left, lime-sealed detail sheet on the right.
DFRobot: SEN0322 Gravity I2C Oxygen Sensor (0 25%Vol, IIC) 9 Volt Battery Clip With DC Jack 2 Watts meter Model:15 Pcs 6mm Mixed 2607017471 2 Watts meter Charge discharged batteries as soon as possible High sensitivity Its effective range is 0~25%Vol
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