The Testo 835-H1 is a versatile non-contact infrared thermometer featuring an integrated humidity module for comprehensive environmental analysis. This professional-grade instrument offers precise temperature measurement from -50°C to +600°C with advanced functionality for industrial and building applications.

• Simultaneous surface temperature and relative humidity measurement
• Dew point detection and surface moisture analysis
• Mold risk identification in building structures
• Compact design for hard-to-reach locations and in-service equipment

• 4-point laser targeting for precise measurement area identification
• 50:1 optical resolution for safe remote measurements (5m distance = 10cm spot)
• Adjustable emissivity for reliable results on various surfaces
• External temperature probe connectivity for low-emissivity surfaces
• Ergonomic joystick and button design for intuitive operation
• 200-location data storage with customizable limits and alarms
• Backlit display for low-light conditions

• Long-distance thermal bridge scanning for early defect detection
• Dew point distance and surface moisture (aw value) measurement
• Historical data comparison for performance validation

1. Open the battery compartment cover
2. Remove used battery and insert new battery with correct polarity
3. Securely close the battery compartment