Q: Does it have a dirt sensor?

Other questions about the iRobot Roomba 640

• Does the iRobot Roomba 640 have mapping?
• How much dirt does the iRobot Roomba 640 hold?
• Does the iRobot Roomba 640 come with an IR/RF remote control?
• How long does the iRobot Roomba 640 battery last on one charge?
• Does the iRobot Roomba 640 work with Google Home?
• Does the iRobot Roomba 640 work with Amazon Alexa?
• Does the iRobot Roomba 640 have carpet boost?
• Does it have a dirt sensor?
• Does the iRobot Roomba 640 have an obstacle avoidance sensor?
• What is the height of the iRobot Roomba 640?

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