Use this digital probe from Testo for precise air temperature and relative humidity measurements in your work area. It features Bluetooth technology for wireless transmission to a compatible measuring instrument. As the probe is battery-powered, there's no need for an external power source. This probe is designed for use with instruments in the 440 series for ease of assembly.

• Relative humidity measurement range of 0 to 100%RH for use in dry and damp environments
• Accuracy of ±0.3°C for temperatures between +15°C and +30°C and +0.5°C across the rest of its measuring range for precise readings

• Medical laboratories
• Cleanrooms
• Cold storage facilities

This probe is powered by AA batteries that provide up to 140 hours of use, so you won't need to replace the batteries frequently.