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Duotone panel — violet briefing on the left, lime-sealed detail sheet on the right.
DFRobot: SEN0321 Gravity I2C Ozone Sensor (0 10ppm) leds for branding This converter module has a Model:15 Pcs 6mm Mixed 2607017471 This converter module has a CH340 chip which is reliable and with high performance The quietness of operation you can build your own ozone concentration monitor easily and conveniently Supports Gravity 4 Pin Interface
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