U3121G wireless data logger for temperature and relative humidity for outdoor probe with built-in 4G COMET modem

Description

The U3121G wireless temperature and relative humidity data logger for outdoor probe with built-in 4G COMET modem is designed to log temperature and humidity from an outdoor probe.

In case the set limits are exceeded, SMS and JSON messages can be sent over the 4G data connection.

Measured values can be sent to the COMET Cloud, a comprehensive monitoring, alarm and analysis system.

It is also possible to set up regular sending of JSON messages to the COMET Database, the sending interval is configurable.

Alarms can be displayed locally with LED, LCD and acoustically with built-in beep.

Recording takes place in non-volatile electronic memory. Data can be transferred to a PC via the included USB-C cable.

The inputs of the GSM data logger can be configured for four binary inputs or two binary inputs and two pulse counters.

The GSM recorder includes a traceable calibration certificate with declared metrological traceability of standards based on the requirements of EN ISO/IEC 17025.

Technical features

MEASURED VALUES

• temperature
• relative humidity
• counted values (dew point …)

TEMPERATURE SENSOR

• measuring range: depending on the connected Digi/E probe
• accuracy: depending on the connected Digi/E probe
• resolution: 0.1 °C
• response time t90 temperature measurement (temperature step 20 °C, air flow approx. 1 m/s): 8 min

SENSOR VLAGE

• measuring range: depending on the connected Digi/E probe
• accuracy: depending on the connected Digi/E probe
• resolution: 0.1 % RH

DEW POINT

• measuring range: depending on the connected Digi/E probe
• accuracy: depending on the connected Digi/E probe
• resolution: 0.1 °C

GSM MODEM PARAMETERS

• LTE Cat 1: LTE FDD/GSM/GPRS/EDGE
• supported network types:
  • GSM/GPRS/EDGE 900/1800 MHz
  • LTE FDD B1/B3/B5/B7/B8/B20

GENERAL TECHNICAL DATA

• operating temperature: -20 … +60 °C
• Channels: 1x connectable probe for temperature and humidity
• memory: 500,000 values in non-cyclical recording mode; 350,000 values in cyclical recording mode
• recording interval to internal memory: adjustable from 1 second to 24 hours
• COMET Cloud recording interval: from 5 minutes
• Alarm measurement and evaluation interval: configurable 1 s, 10 s, 1 min
• recording mode:
  • non-cyclical – data logging stops when the memory is full
  • cyclic – after filling the memory, the oldest data is overwritten by new data
• real time clock: year, leap year, month, day, hour, minute, second
• power supply: rechargeable Li-Ion battery A8200, 3.6 V/5200 mAh
• Protection class: IP67
• dimensions: 61 x 93 x 53 mm, with antenna 120 x 93 x 53 mm
• Weight (including batteries): approx. 260 g
• Warranty: 3 years

Delivery includes:

• U3121G
• Directions
• traceable calibration certificate
• rechargeable battery
• power supply
• USB-C cable
• FREE COMET Vision analytical software
• COMET Cloud for 3 months

Software

• Comet Vision software (2.2.8445.25397 dbapi 20.2)
• Comet Database One Click Installer (20.2-I)
• Conversions – the app for converting values

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Other designations: U7844 G, U7844_G, U7844-G, U7844/G