COMET C3120 Thermo-Hygrometer

COMET C3120 – Digital Thermo-Hygrometer with Internal Sensors -10 to +60 °C (±0.4 °C), Humidity 5–95 %RH (±2.5 %), Dew Point -40 to +60 °C, Audible/Visual Alarm, LCD Backlight 

The COMET C3120 is a compact digital thermo-hygrometer with integrated sensors – the ideal instrument for precise indoor climate monitoring of temperature, relative humidity, and dew point in offices, warehouses, climate chambers, server rooms, museums, archives, greenhouses, pharmaceuticals, or anywhere temperature and humidity need to be measured directly and on the go. With a measuring range of -10 to +60 °C for temperature, 5 to 95 %RH for humidity, and -40 to +60 °C for dew point, high accuracy, and traceable calibration certificate, it is perfect as a reference device for critical applications.

The instrument measures with internal sensors – no external probes required, ready for immediate use. The audible and visual alarm warns instantly when freely adjustable limits are exceeded. The Hold function stores current readings manually for later display. The backlit LCD screen ensures easy readability, while the measuring interval (0.7 to 5 s) and display update rate are adjustable. The robust housing (IP20) and battery operation (9 V block or 12 V power supply with NiMH battery) make it mobile and independent – battery life approx. 4 months.

The thermo-hygrometer is maintenance-free, long-term stable, and comes with a 3-year warranty. The supplied traceable calibration certificate guarantees maximum measurement accuracy from the factory. Intuitive operation via keys and clear menu. Whether used as a mobile device in the field, as an indoor climate monitor in production, or as a reference in the laboratory – the C3120 stands out for its precision, reliability, and ease of use.

Why the COMET C3120 is the best thermo-hygrometer:

• Integrated sensors – ready for use, no probes required
• High accuracy – Temp. ±0.4 °C | Humidity ±2.5 %RH (5–95 %)
• Dew point calculation – ±1.5 °C at T<25 °C and RH>30 %
• Audible and visual alarm – immediate warning when limits are exceeded
• Hold function – manual storage of current values
• Backlit LCD display – easily readable even in poor lighting conditions
• Traceable calibration certificate included – maximum traceability
• Mobile battery operation – approx. 4 months runtime (9 V block or NiMH battery)
• Rugged housing – for everyday professional use
• 3-year warranty – COMET quality guaranteed

Technical data C3120:

• Temperature measuring range: -10 to +60 °C (±0.4 °C)
• Humidity measuring range: 5 to 95 %RH (±2.5 %RH from 5 to 95 % at 23 °C)
• Dew point: -40 to +60 °C (±1.5 °C at T<25 °C and RH>30 %)
• Resolution: 0.1 °C / 0.1 %RH / 0.1 °C dew point
• Alarm: audible + visual (adjustable limits)
• Hold function: yes, manual storage
• Display: backlit LCD
• Measuring interval / display update: 0.7 to 5 s
• Power supply: 9 V battery or 12 V DC adapter with NiMH 9 V battery
• Battery life: approx. 4 months
• Operating temperature: -10 to +60 °C
• Protection class: IP20
• Dimensions (without connector): 191 x 71 x 27 mm
• Weight (including battery): approx. 155 g
• Warranty: 3 years

Perfect for:

• Indoor climate monitoring in offices and warehouses
• Climate chambers and incubators
• Food and pharmaceutical storage
• Heating and cooling technology
• Process monitoring and quality control
• Mobile humidity and temperature measurement in the field
• Museums, archives, and sensitive storage areas
• Reference measurements and documentation

Installation and operation – ready to use instantly

Insert the battery or connect the power supply – done! Set limit values, press Hold – start measuring immediately. The backlit display and audible alarm ensure safe and convenient operation. Calibration certificate included – ideal for audits and quality management.

Summary:

• Thermometer and hygrometer for direct measurement of temperature and relative humidity
• Audible and visual alarm indication of measured values
• Storage of minimum and maximum values
• Hold function: manual storage of readings for later display
• LCD backlight
• Simultaneous measurement of temperature and relative humidity, dew point selectable, integrated sensors.

Scope of delivery:

• C3120
• User manual
• Traceable calibration certificate
• 9 V battery
• Plastic transport case