COMET U0121 – 2-Channel Temperature Data Logger for 2 External Pt1000 Probes

COMET U0121 – Robust 2‑Channel Temperature Data Logger for 2 External Pt1000 Probes (−90 to +260 °C ±0.2 °C), 500,000‑Value Memory, Acoustic/Optical Alarm

The COMET U0121 is a compact and extremely robust 2‑channel temperature data logger designed for two external Pt1000 probes – the ideal solution for precise long‑term monitoring and documentation of temperature in cold chains, warehouses, climate chambers, cold rooms, transport, pharmaceutical production, the food industry, server rooms, heat‑treatment facilities, or anywhere two temperature points need to be recorded simultaneously. With a large memory of 500,000 values (non‑cyclic) or 350,000 values (cyclic), a freely adjustable recording interval (1 s to 24 h), and a traceable calibration certificate (EN ISO/IEC 17025), it is perfect for quality management, audits, temperature mapping, and ISO compliance.

The two external Pt1000 inputs measure temperature from −90 to +260 °C (±0.2 °C from −50 to +100 °C, ±0.2 % of the measured value above that, ±0.4 % from −90 to −50 °C). The acoustic and optical alarm (buzzer + LED) alerts immediately when user‑defined limits are exceeded. Min/Max values are stored automatically. The backlit LCD display offers good readability, and the measurement/alarm update rate can be set (1 s, 10 s, or 1 min). The logger operates autonomously on a 3.6 V AA lithium battery, lasting several years depending on interval settings. No power supply is required – ideal for both stationary and mobile applications. Recording can be non‑cyclic (stops when memory is full) or cyclic (overwrites oldest data). A real‑time clock with date/time is built in. Data transfer to PC is via USB‑C using COMET Vision software.

The data logger 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 clear menu navigation. The compact housing (61 × 93 × 32 mm, approx. 130 g incl. battery) with IP67 protection makes it resistant to dust and splashing water. Whether used as a stand‑alone logger in production, a mobile tester in service, or as part of a monitoring system – the U0121 stands out for precision, durability, and ease of use. Two Pt1000 inputs allow differential measurement (e.g. flow/return or product/ambient).

Why the COMET U0121 is the best 2‑channel Pt1000 data logger:

• 2× external Pt1000 inputs – dual‑temperature measurement for difference or redundancy
• 500,000‑value memory – non‑cyclic or cyclic operation
• Recording interval freely adjustable – 1 s to 24 h
• Acoustic & optical alarm – instant alert on limit exceedance
• Min/Max memory – extreme values per channel
• Backlit LCD – both channels displayed simultaneously
• Traceable calibration certificate included – EN ISO/IEC 17025
• Battery‑powered operation – lithium AA, service life of several years
• IP67 protection – dust‑ and splash‑resistant
• 3‑year warranty – COMET quality guaranteed

Technical data U0121:

• Temperature external (Pt1000): −90 to +260 °C (±0.2 °C from −50 to +100 °C / ±0.2 % above / ±0.4 % from −90 to −50 °C)
• Resolution: 0.1 °C
• Channels: 2× external temperature probes
• Memory: 500,000 values (non‑cyclic) / 350,000 values (cyclic)
• Recording interval: 1 s to 24 h
• Measurement/alarm update: adjustable 1 s, 10 s, 1 min
• Alarm: acoustic (buzzer) + optical (LED) at limit exceedance
• Display: backlit LCD
• Power supply: lithium battery 3.6 V AA
• Operating temperature: −30 to +70 °C
• Protection class: IP67
• Dimensions: 61 × 93 × 32 mm
• Weight (incl. battery): approx. 130 g
• Warranty: 3 years

Perfect for:

• Cold‑chain & transport monitoring (differential measurement)
• Warehouse and cold‑room monitoring
• Pharmaceutical and food production
• Climate chambers and incubators
• Product vs. ambient temperature (dual channel)
• Quality management & audits
• Autonomous long‑term recording without mains connection
• Mobile inspection and service

Installation and operation – done in minutes

Connect the external Pt1000 probes, insert the battery – finished! Set intervals and limits, start logging – read out data via USB‑C. The backlit display and acoustic/optical alarm ensure safe and convenient operation. Calibration certificate included – ideal for audits and quality management.

Summary:

• The data logger is designed for temperature measurement with two external Pt1000 probes
• Recording is stored in non‑volatile electronic memory
• Data can be transferred to a PC via USB‑C
• When limits are exceeded, alarms are indicated by LED, LCD, and acoustic buzzer
• The device comes with a traceable calibration certificate
• The metrological traceability of the standards meets EN ISO/IEC 17025 requirements

Scope of delivery:

• U0121
• User manual
• Traceable calibration certificate
• 1× lithium battery 3.6 V
• Free full version of COMET Vision analysis software
• External probes and USB communication cable are not included