U0843M Temperature and Digital Input Data Logger with GSM Modem

U0843M Temperature  and Digital Input Data Logger with GSM Modem
 U0843M Temperature  and Digital Input Data Logger with GSM ModemU0843M Temperature  and Digital Input Data Logger with GSM Modem 
Our Price:  £485.00(£582.00 Inc. VAT)
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Digital Inputs:  2
Temperature Inputs:  2



Special order, 5-10 day despatch

The U0843M is a battery powered datalogger with built-in GSM modem that can accept 2 external PT1000 temperature probes and 2 digital inputs. Featuring a  LCD display, large 500,000 sample memory and a USB interface for configuration and data download. The GSM modem can be set to send high and low alarm alerts text messages to up to 4 recipients and can periodically send temperature readings via text or JSON.

Special Offer:  Discounts of 7%, 10%, 12.5% and 15% are available when you order 10, 25, 50 and 100 items or more of this product.

  • 2 x External PT1000 Temperature Probes (additional)
  • Measuring temperature range:  -90 to +260°C
  • Resolution: 0.1°C
  • 4 Digital Inputs - voltage,  volt-free contact or an open-collector transistor
    • Voltage Input - <0.4V logic low, >2V logic high. Max input 30V DC
    • Resistance Input <10K logic low, >300k logic high
  • Relative humidity measuring range 0 to 100%
  • LCD Display
  • Real time clock: year, leap year, month, day, hour, minute, second
  • Logging interval: adjustable from 1s to 24h
  • Total memory capacity: 500,000 values in non-cyclic mode, 350 000 values in cyclic record mode
  • Configuration and data download via USB
  • Built-in GSM Modem
    • can send text message alarms to up to 4 recipients
    • can send current reading and status reports in a readable format on a regular timed basis
    • can send data in JSON machine readable format on a regular basis to be processed in a database or in a cloud system
  • Dimensions without connectors: 61mm x 93mm x 53mm, with antenna 120mm x 93mm x 53mm
  • Power: SONY LiIon 5200mAh
  • Typical battery life: Up to 6 years (depends upon text message frequency)
  • Protection: IP67 - protected against influence of temporary immersion into water
  • Includes Traceable calibration certificate based on EN ISO/IEC 17025 standard.

This datalogger is designed for stand-alone measurements and recording of physical and electrical data, the data recording interval being presettable from 1 s to 24 h. This device can be used mounted in a fixed-position or as a portable version.


  • Stores an autonomous chronological record of measured values in internal non-volatile memory.  The values to be collected can be measured at the instant of recording or as average or min/max values detected during the recording interval. Recording can be performed continuously or only when an alarm condition is detected. The recording mode can be also set optionally as non-cyclic or as cyclic. In cyclic mode older data is overwritten with new data when the memory becomes full.
  • Detect and log minimum and maximum values (existing since their last manual resetting) of each quantity
  • Display the measured values on an LCD display. Some features can be controlled by two push buttons situated next to the display (device switching off and on, deactivation of alarm signalling, Min/Max value resetting),
  • Configure up to two alarm signalling limits for each quantity to be measured. The alarm signalling can be realised visually, optionally by a symbol appearing on the display or by a short blink of an LED, or acoustically. In addition, all UxxxxM series dataloggers contain a GSM modem to send alarm SMS messages to up to four selected receivers.
  • Send within a presettable interval informative SMS messages containing device identification, currently measured values and alarm states to up to four selected receivers. These messages may be of two kinds: user readable (suitable to  be displayed on a mobile phone), or machine readable (suitable for automated data processing in a database or a cloud).
  • Powered from an internal Li-ion battery. This can be charged by a common USB charger. The  internal GSM modem is connected to the supply only when a SMS send is made, otherwise it is disconnected to save energy.
  • Communicate with a computer by means of a USB interface (all device settings, recorded data downloading, and online monitoring). To communicate, the datalogger utilises the HID USB standard, which does not require additional controllers to be built into the PC


Comet Vision 2.0 Software

The free Comet Vision software is designed for communication with data loggers, read out the configuration of the device and setting up the parameters. It also allows to read out the data from the device in order to get the measured values. For temperature and humidity devices it is possible to select one calculated value (dew point temperature, absolute humidity, specific humidity, mixing ratio, specific enthalpy).

Data can be viewed and printed as table or graph. It it also possible to export the data to DBF or TXT files. You can change the axis and select any time range to view or print out the data. You can zoom the graph, modify the drawing width and the its colour. It is also possible to separate the quantities from each other and print some of them or all of them separately.


Comet Database

Comet Database - system for collecting, alarming and analysing of measured data from all COMET devices.
Contains one license of Database Viewer.

  •     data tracking, creating of reports, prints, charts, graphs, export of data
  •     SMS alarms (necessary to buy KIT-GSM-W) and Emails
  •     data collection
  •     simple and fast access to data
  •     data store
  •     easy installation

Comet Database contains of many useful tools for data analysis - graphs, tables, statistics etc. Comet Database also offers advanced features - secured access to data, accounts administration, remote monitoring, error diagnostic, database backup etc. 



Quick Start Guide >>

User Manual >>

Comet Vision Software >>

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