Monitor temperature and humidity levels in an enclosed area using this digital hygrometer from Testo. It supports a relative humidity measurement range of 0 to 100%, so you can use it in both wet and dry environments. The broad temperature measuring range between -20°C and +60°C means it's suitable for use in hot and cold applications. As it's Bluetooth-enabled, you can connect it to the Testo Smart Probes App for easy data analysis via your phone or tablet. This device also calculates the dewpoint and wet bulb temperature, so you can use it to measure the level of water vapour in the air for enhanced versatility.

• Stability rating of ±1%RH (relative humidity) per year for long-term accurate results
• Light weight of 86.4g for easy handling
• Bendable probe head to fit into awkward spaces
• Bluetooth range of 100m for long-distance data transfer

• Food storage equipment
• HVAC (heating, ventilation and air conditioning) systems
• Pharmaceutical industry

This device uses an NTC (negative temperature coefficient) sensor that uses changes in electrical resistance to measure fluctuations in temperature for precise measurement.