Accurately measure temperature and moisture levels with this digital thermometer from Testo. This device measures temperatures between -40°C and +150°C and relative humidity between 0 and 100%RH, so it's suitable for use in harsh environments. It also gauges pressures between 0 and 2000hPa, making it a versatile instrument. This device is commonly used for working out the U-value of building walls, roofs and floors.

• Illuminated display for easy reading in dimly lit areas
• IP54 rating means it's protected against limited amounts of dust and water spray
• Stores up to 10,000 measurement values for ease of data analysis
• Light weight of 428g for portability

• Construction sites
• Building inspections
• HVAC systems
• Warehouses

Yes, it uses AA batteries and has a long battery life of 200 hours, so there's no need to connect it to a power source.