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co2 monitor with dual-channel ndir sensor
GZAIR MCH3-B CO2 Data Logger Monitor, Battery Included IAQ CO2 Detector, Dual-Channel NDIR Sensor, Tabletop Carbon Dioxide Meter with Data Export, Temperature and Humidity, 0~5000ppm Range Black
$160
$160 ×
carbon monoxide detector handheld
GZAIR X-1 Carbon Monoxide Detector with Visual, Audible, and Vibrating Alerts, Handheld CO Monitor, Portable CO Gas Alarm for Home and Travel, Battery Operated, Alarm Logger
$109
$109 ×

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Subtotal $269
Total $269
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