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RedTagCanada DHT-11 DHT11 Digital Temperature Humidity Sensor Temperature Sensor 4P 4 PIN for Arduino Low Power Consumption Module Board (2, DHT11 Sensor): Amazon.com: Industrial & Scientific
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Amazon.com: New 4-pin DHT11 Digital Temperature & Humidity Sensor Module Probe for HVAC About 2.3cm x 1.2cm : Appliances
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