COMET D3633 – Thermo-Hygrometer with Magnetic Temperature Sensor + Logger for Surface Measurement

COMET D3633 – Thermo-hygrometer with integrated magnetic surface temperature probe, -10 to +60 °C (±0.4 °C), humidity 5–95 %RH (±2.5 %), dew point, data logger for 16,000 records 

The COMET D3633 is a professional digital thermo-hygrometer with integrated data logger and built-in magnetic surface temperature probe at the bottom of the device – the ideal solution for precise measurement and long-term recording of surface temperature, ambient temperature, relative humidity, and dew point in mechanical engineering, motor monitoring, pipelines, radiators, heat exchangers, bearings, climate chambers, or anywhere temperature on metallic surfaces must be quickly and securely measured while monitoring ambient climate at the same time. The strong magnetic contact ensures firm adhesion to iron and steel surfaces without adhesive tape or screws – perfect for quick checks and continuous measurements.

The internal humidity sensor measures from 5 to 95 %RH (±2.5 %RH at 23 °C) and automatically calculates the dew point (−40 to +60 °C, ±1.5 °C at T<25 °C and RH>30 %). The integrated magnetic probe measures surface temperature from −10 to +60 °C (±0.4 °C). Additionally, the display shows the temperature difference between the surface probe and the dew point – ideal for detecting condensation and dew formation. The acoustic and optical alarm warns immediately when freely adjustable limits are exceeded. The Min/Max memory displays extreme values. The Hold function manually stores current readings for later reference. The backlit LCD display ensures easy readability, and the measuring rate (0.7–5 s) and display refresh rate are adjustable. The robust housing (IP20) and battery operation (9 V block or 12 V power adapter with NiMH battery) make it mobile and independent – battery life approx. 6 months.

The integrated data logger stores up to 16,000 readings (non-cyclic or cyclic) with a freely adjustable logging interval (10 s to 24 h). The free PC software enables simple data transfer via USB cable (download only – no measurements during USB connection). Data can be displayed graphically, exported, and analyzed. The device is maintenance-free, long-term stable, and comes with a 3-year warranty. The included traceable calibration certificate ensures maximum measurement accuracy from the factory. Intuitive operation via buttons and a clear menu. Whether used as a mobile logger in service, a stationary monitor on machinery, or a reference instrument in the laboratory – the D3633 stands out through precision, flexibility, and convenient magnetic mounting for quick surface temperature measurements.

Why the COMET D3633 is the best thermo-hygrometer with magnetic probe and logger:

• Integrated magnetic temperature probe – secure adhesion on metallic surfaces
• 16,000-value memory – cyclic or non-cyclic operation
• Freely adjustable recording interval – 10 s to 24 h
• High accuracy – Temp. ±0.4 °C | Humidity ±2.5 %RH
• Dew point calculation & temperature difference display – condensation alert
• Acoustic and optical alarm – immediate warning on limit exceedance
• Min/Max memory & Hold function – extreme values and manual data capture
• Backlit LCD display – readable even in poor lighting conditions
• Traceable calibration certificate included – maximum data traceability
• Mobile battery power – approx. 6 months runtime (9 V block or NiMH battery)
• 3-year warranty – guaranteed COMET quality

Technical data D3633:

• Temperature measuring range (magnetic probe & internal): −10 to +60 °C (±0.4 °C)
• Humidity measuring range (internal): 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: acoustic + optical (adjustable limits)
• Memory: 16,000 values (non-cyclic or cyclic)
• Recording interval: 10 s to 24 h (adjustable)
• Measuring interval / display update: 0.7 to 5 s
• Display: backlit LCD
• Power supply: 9 V battery or 12 VDC adapter with NiMH 9 V rechargeable battery
• Battery life: approx. 6 months
• Operating temperature: −10 to +60 °C
• Protection rating: IP20
• Dimensions (without connector): 191 × 71 × 27 mm
• Weight (incl. battery): approx. 155 g
• Warranty: 3 years

Perfectly suited for:

• Surface measurements on machinery and engines
• Pipelines, radiators, and heat exchangers
• Condensation and dew water monitoring (temperature difference display)
• Indoor climate monitoring in offices and warehouses
• Climate chambers and incubators
• Food and pharmaceutical storage
• Mobile testing and service applications
• Reference measurements and long-term documentation

Installation and operation – ready to use immediately

Simply attach the magnetic probe to a metal surface (magnetic force ensures stable contact), insert the battery or connect the power supply – done! Set limit values, start the logging process – and later transfer data to a PC via USB. The backlit display and acoustic alarm ensure safe and convenient operation. Calibration certificate included – ideal for audits and quality management.

Summary:

• Thermometer and hygrometer for measuring and recording temperature and relative humidity in internal non-volatile memory
• Free PC software for data transfer and analysis
• LCD backlight
• Acoustic and optical alarm for temperature difference
• Logger connects to PC via USB cable for data transfer only
• No measurements possible while connected to PC
• Simultaneous measurement of temperature and relative humidity, optional dew point measurement, integrated sensors
• Magnetic surface temperature probe mounted at the bottom of the device
• Display of temperature difference between surface probe and dew point

Scope of delivery:

• D3633
• User manual
• Traceable calibration certificate
• 9 V battery
• Mini USB cable
• Plastic transport case
• Self-adhesive double lock for easy mounting
• Free full version of COMET Vision analysis software