COMET U3832G – IoT Wireless Datalogger with 4G Modem, Internal Temperature and Humidity Measurement, and Flood Detection

COMET U3832G – IoT Wireless Datalogger with 4G Modem, internal T+RH (-20 to +60 °C ±0.4 °C / 0–100 %RH ±1.8 %), Dew Point, Integrated Flood Detector (LD-81, 2.5 m cable), SMS/JSON Alarm

The COMET U3832G is a state-of-the-art IoT wireless datalogger with an integrated 4G modem and flood detector – the ultimate autonomous solution for remote monitoring of temperature, relative humidity, dew point, and water leakage in basements, server rooms, warehouses, boiler rooms, archives, museums, pharmaceutical areas, or anywhere early water damage detection and remote temperature/humidity monitoring are required. When limits are exceeded or water contact is detected, the logger immediately sends an SMS and JSON alarm via 4G. Regular JSON data transfers to COMET Database or COMET Cloud (complete monitoring, alarm, and analysis tool) can be configured. On-site alarms are triggered via LED, LCD, and buzzer. With memory for 1 million values (non-cyclic) or 600,000 values (cyclic) and a traceable calibration certificate (EN ISO/IEC 17025), it’s perfect for quality management, audits, insurance documentation, and damage prevention.

The internal sensors measure temperature from -20 to +60 °C (±0.4 °C) and humidity from 0 to 100 %RH (±1.8 %RH). The dew point is automatically calculated (-90 to +60 °C, ±1.5 °C at T<25 °C and RH>30 %). The integrated flood detector LD-81 (2.5 m cable, not extendable, ELKA connector, powered directly by the logger) detects water immediately – ideal for leak and flooding alerts. Acoustic and visual alarms warn instantly when freely adjustable limits are exceeded or in case of flood contact. Min/Max values are stored. The backlit LCD shows all readings simultaneously. The logger operates fully autonomously with an internal battery – no external power supply required. Data download via USB-C to PC is supported. COMET Cloud: 3 months free, then 1 credit per year. Supported LTE FDD B1/B3/B5/B7/B8/B20 & GSM 900/1800 MHz ensures worldwide coverage and stable data transmission.

The datalogger is maintenance-free, long-term stable, and comes with a 3-year warranty. The included traceable calibration certificate guarantees maximum measurement accuracy ex-factory. Intuitive configuration via LCD or COMET Cloud. Whether as a mobile remote logger for buildings without network, a stationary monitor in basements, or a central device in facility management, the U3832G convinces with precision, autonomy, 4G connectivity, and an integrated flood detector for maximum safety. The flood detector is intended for indoor use only.

Why the COMET U3832G is the best IoT 4G datalogger with flood detector:

• Integrated 4G modem (LTE Cat 1) – SMS/JSON alarm & data transmission without Wi-Fi/LAN
• Internal T+RH sensor + flood detector LD-81 (2.5 m cable) – early water damage detection
• 1 million data values memory – non-cyclic or cyclic
• COMET Cloud – full monitoring, alarm & analysis (3 months free)
• Acoustic/optical alarm + LED – immediate local warning
• Dew point & all humidity parameters – automatically calculated
• Backlit LCD – all readings visible simultaneously
• Traceable calibration certificate included – EN ISO/IEC 17025
• Autonomous battery operation – no external power supply required
• 3-year warranty – guaranteed COMET quality

Technical Data U3832G:

• Internal temperature: -20 to +60 °C (±0.4 °C)
• Internal humidity: 0 to 100 %RH (±1.8 %RH)
• Dew point: -90 to +60 °C (±1.5 °C at T<25 °C and RH>30 %)
• Flood detector: LD-81, 2.5 m cable, not extendable, ELKA connector, indoor use
• Resolution: 0.1 °C / 0.1 %RH / 0.1 °C dew point
• Alarm: acoustic + optical + SMS/JSON via 4G
• Memory: 1,000,000 values (non-cyclic) / 600,000 values (cyclic)
• Logging interval: 1 s to 24 h
• Measurement interval / display refresh: 0.7 to 5 s
• Display: backlit LCD
• Communication: 4G modem (LTE FDD B1/B3/B5/B7/B8/B20 + GSM/GPRS/EDGE 900/1800 MHz) + USB-C
• Power supply: internal battery (operating time depending on configuration – several months/years)
• Operating temperature: -10 to +60 °C
• Protection class: IP20 (device)
• Warranty: 3 years

Perfect for:

• Early water damage detection in basements & boiler rooms
• Cold chain & transport monitoring (temperature & humidity remotely)
• Warehouse and cold room monitoring at remote sites
• Pharmaceutical and food production
• Server rooms and data centers (leakage + climate)
• Greenhouses & agriculture
• Remote monitoring without on-site Internet access
• Quality management & insurance documentation

Installation and operation – done in minutes

Connect an external probe (optional), place the flood detector, insert SIM card (if desired), activate the battery – done! Set intervals, limits, and Cloud/SMS configuration, start logging – read data via COMET Cloud or USB-C. The backlit display and acoustic alarm ensure safe and convenient operation. A calibration certificate is included – ideal for audits and quality management.

Summary:

• The U3832G datalogger measures temperature, relative humidity, and dew point temperature using internal sensors
• A connected LD-81 flood detector warns of water damage
• If set limits are exceeded, SMS and JSON messages are sent via 4G data connection
• Measured values can be transmitted to COMET Cloud – a comprehensive monitoring, alarm, and analysis system
• Regular JSON message transfer to COMET Database can also be set up; sending interval is configurable
• Alarms are indicated locally via LED, LCD, and an integrated acoustic signal
• Recording is stored in non-volatile electronic memory
• Data can be downloaded to a PC via the supplied USB-C cable
• The 4G recorder includes a traceable calibration certificate with declared metrological traceability of the standards according to EN ISO/IEC 17025
• When purchasing a new IoT wireless datalogger with integrated modem, you receive 3 months of COMET Cloud free. For a full operational year in COMET Cloud, 1 credit is required.

Package contents:

• U3832G
• User manual
• Traceable calibration certificate
• Battery
• Power adapter
• USB-C cable
• Free full version of COMET Vision analysis software
• COMET Cloud for 3 months
• LD-81 flood detector
• SIM card not included