Testo 174T BT Mini Temperature Data Logger with Bluetooth® The Testo 174T BT Mini Bluetooth® Temperature Data Logger is a smart, simple and user-friendly solution for monitoring temperature sensitive goods and environments. Small but robust it measures temperatures from -30°C to +70°C, perfect for food storage, pharmaceuticals, logistics, cold chain management and indoor climate monitoring. The free Testo Smart App (iOS/Android) allows easy setup, live data, documentation and export – all from your smartphone or tablet. With a 16,000-value memory, stable NTC sensor accuracy of ±0.5°C and automatic data backup this logger will save your critical temperature records even during battery replacement. Easy to mount and IP65 protected the Testo 174T BT is s