A remote temperature monitor is a compact wireless sensor that tracks temperature and humidity conditions via a cell phone. Thetop wireless temperature sensors are accompanied by a mobile app that visualizes the real-time data and enables you to settriggers to alert you of any important changes to the conditions. This wireless thermometer measures just 3" x 3" x 1" and weighs only 83g making it one of the most smallest remote temperature sensors on our list. Despite its small size, the sensor is accurate, constructed with a Swiss-made sensing component you’ll always get reliable measurements.