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fitfit Air Quality Monitor - Indoor Formaldehyde Detector, TVOC Tester for Home & Office

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Security Grade IR Beam Detector - 12-36V DC IP65 Rated 40M Long-Range Anti-Tamper Sensor for Perimeter Protection

Air Quality Detectors, CO2 Carbon Dioxide Detectors, Temperature, Humidity, and Gas Sensors

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10Pcs/lot 1 PIR Infrared Sensor IR Human Body Motion Detector Module for Arduino Security Alarm System

Simulated CO2 Monitoring Module, CO2 Gas Detector VOC Air Quality Detection Sensor Module

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