COMET S3120E – Temperature and Humidity Data Logger

COMET S3120E Thermo-Hygrometer Data Logger Economy 

The COMET S3120E is the affordable and reliable thermo-hygrometer data logger of the Economy series for continuous monitoring of temperature and relative humidity. With its large, easy-to-read dual-line display, acoustic and optical alarms, and a storage capacity of up to 32,000 records, it is the ideal solution for warehouses, transport, greenhouses, server rooms, museums, archives, or any environment requiring cost-effective yet accurate climate data recording.

The S3120E operates completely autonomously on battery power (up to 6 years of operation) and records at adjustable intervals from 10 seconds to 24 hours. When set limits are exceeded, it immediately issues an audible and visual alarm—perfect for both mobile and stationary use without the need for constant supervision.

Reading and configuration are simple via USB using the free COMET software, including graph display, CSV/PDF export, and email alert options. The logger is robust, splash-resistant, and ready to use right out of the box.

Despite its attractive economy price, you still get full COMET quality: precise sensors, long battery life, and a 3-year warranty.

Why the COMET S3120E is the most popular Economy data logger:

• Affordable & reliable – full functionality at a low price
• Large dual-line display – clear visualization of current values
• Acoustic & optical alarm – instant alerts when limits are exceeded
• 32,000 data points – long recording periods
• Battery life up to 6 years – fully autonomous
• USB download + free software – easy data analysis
• Adjustable logging intervals – from 10 s to 24 h
• Rugged & splashproof – ideal for harsh environments
• Ready to use – includes battery and software
• 3-year warranty

Technical highlights at a glance:

• Temperature range: –30 to +70 °C (±0.4 °C)
• Humidity range: 0 to 100 %RH (±2.5 %RH from 5–95 %)
• Memory: 32,000 values (16,000 T + 16,000 RH)
• Logging interval: adjustable from 10 s to 24 h
• Display: dual-line LCD with backlight
• Alarm: acoustic (buzzer) + optical (flashing)
• Interface: mini USB for reading and configuration
• Software: free of charge (graphing, export, email alert)
• Power supply: 1 × 3.6 V lithium battery (up to 6 years)
• Protection rating: IP67 (dust- and waterproof)
• Dimensions: approx. 93 × 62 × 28 mm
• Weight: approx. 120 g including battery
• Warranty: 3 years

Perfect for:

• Storage and transport monitoring
• Server rooms and data centers
• Museums, archives, and libraries
• Greenhouses and agriculture
• Food and pharmaceutical storage
• Production areas and quality control
• Private use (home, cellar)
• Mobile measurements and long-term monitoring

Quick setup – ready in seconds

Insert the battery, press the button – the logger starts immediately. Set intervals and limits easily via USB and software. The S3120E is instantly ready to measure.

Summary:

• The data logger records temperature and humidity.
• Measured data are stored in non-volatile electronic memory.
• Data transfer to a PC for further analysis is possible via USB, RS232, GSM, or Ethernet using the appropriate communication adapter.
• The device is supplied with a traceable calibration certificate meeting the metrological traceability requirements according to EN ISO/IEC 17025.
• Optional accessories are required for PC communication: a USB adapter, a COM adapter, or a start/stop magnet if data recording is not controlled directly from the computer.

Scope of delivery:

• S3120E
• User manual
• Traceable calibration certificate
• 1 × 3.6 V lithium battery
• Free full version of COMET Vision analysis software
• USB communication cable not included