UNI-T UT333S Temperature and Humidity Meter

HVAC technicians, warehouse supervisors, and home inspectors rely on the UNI-T UT333S for quick, reliable environmental readings. This compact meter delivers precise temperature and humidity data in real time, making it an essential tool for diagnosing climate control issues, verifying storage conditions, and ensuring occupant comfort.

Key specifications

• Temperature measurement range: -10°C to 60°C (14°F to 140°F)
• Temperature accuracy: ±1.0°C (±2.0°F)
• Humidity measurement range: 0% RH to 100% RH
• Humidity accuracy: ±5% RH (0-10% & 90-100% RH), ±4% RH (10-90% RH)
• Resolution: 0.1°C / 0.1°F, 0.1% RH
• Sampling rate: 1 second
• LCD display with backlight
• Data hold, MAX/MIN measurement, °C/°F selection
• Auto power off after 5 minutes, low battery indication
• Power supply: 3 x 1.5V AAA batteries
• Battery life: approximately 12 hours (backlight on)
• Operating temperature: -10°C to 50°C (14°F to 122°F)
• Operating humidity: 0% RH to 99% RH (non-condensing)
• Certifications: CE, RoHS

Why choose it

The UT333S stands out for its high-precision sensor and user-friendly interface. The backlit LCD ensures readability in dim environments, while the data hold and MAX/MIN functions allow you to capture and review critical readings easily. Its auto power-off feature conserves battery life, making it dependable for long workdays.

Ideal use cases

• Monitoring temperature and humidity in server rooms, greenhouses, and museums
• Verifying HVAC system performance during installation and maintenance
• Checking indoor air quality in offices, schools, and residential buildings
• Assessing storage conditions for sensitive materials like pharmaceuticals and food

Good to know

The meter operates reliably in a wide range of environments, from cold storage to hot attics. Its compact size and lightweight design make it easy to carry in a tool bag or pocket. For best accuracy, allow the sensor to stabilize for a few minutes after moving between extreme conditions.