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Sump Alarm Level Sense Freezer Sentry Wi-Fi enabled Temperature and Humidity Alarm With 10FT Sensor LS-SENTRY-120V-FREEZER-10FT-RAW | Zoro
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YoLink Smart Wireless Temperature & Humidity Sensor, Wide Temp Range (-22 to 158 degree) for Freezer, Fridge, Green house, Pet Cage Monitoring, Smartphone Alerts, Works w/ Alexa IFTTT -Hub Required - Walmart.com
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Amazon.com: WiFi Freezer Alarm and Refrigerator Temperature Monitor – Wireless Freezer Thermometer (4 Foot Sensor Length) : Home & Kitchen
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