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Comet Ethernet Multilogger - thermo-hygro-CO2 meter with 2 MiniDIN and 2 Terminals


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Comet Ethernet Multilogger - thermo-hygro-CO2 meter with 2 MiniDIN and 2 Terminals

Battery powered datalogger with built-in CO2 sensor and 4 universal inputs for measurement of temperature, humidity, 0-10V voltage, 0-20mA current, two-state signal and for counting pulses.

Multilogger can be installed permanently to Ethernet network or work as portable device.

Included is traceable calibration certificate in accordance with EN ISO/IEC17025.

The device is designed for measuring and recording temperature, humidity, CO2 (internal sensor) with adjustable recording intervals from 1 second to 24 hours.

Datalogger can be connected to Ethernet. Then measured values can be viewed on a web browser, as well as stored and downloaded for later analysis.

  • on-line monitoringcarbon dioxide
  • recording of data
  • alarm warnings



  • Temperature
  • Relative humidity
  • Counted values (dew point…)
  • CO2
  • Current
  • Voltage
  • Two-state signal
  • Pulses


  • Measuring range -200 to +600 °C
  • Accuracy ±0.2 °C (-200 to +100 °C);
    ±0.2 % from reading from +100 to +600 °C
  • ±0.2 % from reading from +100 to +600 °C
  • Resolution 0.1 °C


  • Measuring range according to the connected probe Digi/M
  • Accuracy according to the connected probe Digi/M
  • Resolution 0.1 °C


  • Measuring range according to the connected probe Digi/M
  • Accuracy according to the connected probe Digi/M
  • Resolution 0.1 °C


  • Measuring range 0 to 2 000 ppm
  • Accuracy 50 ppm + 2 % of the measured value at 23 °C a 1013 hPa
  • Resolution 1 ppm
  • Measuring range 0 to 10 V
  • Accuracy ±10 mV
  • Resolution better than 100 µV


  • Measuring range 0 to 20 mA
  • Accuracy ±20 µA
  • Resolution better than 0,1 µA


  • Input voltage for level “switched on”/ <0,4 V/> 2 V
  • Minimum/maximum input voltage 0 V/+30 V DC
  • I mpedance of the “switched on”/ < 10 kOhm/> 300 kOhm


  • Range of counter 24 bit (16 777 215) the counter overflow can be allowed
  • Maximum input frequency 200 Hz


  • Operating temperature -10 to +60 °C
  • Channels internal CO2 sensor, 2x external temperature probe or connectable temperature+humidity probe,
    2x binary, counter, voltage and current input
  • 2x binary, counter, voltage and current input
  • Counted values dew point, absolute humidity, specific humidity, mixing ratio, specific enthalpy
  • Memory 1 000 000 values (noncyclic record), 600 000 values (cyclic record)
  • Recording interval 1s to 24 hours
  • Display and alarm refresh each 10 s
  • Recording mode noncyclic - data logging stops after filling the memory
    cyclic - after filling memory oldest data is overwritten by new
  • cyclic - after filling memory oldest data is overwritten by new
  • Available temperature units degrees Celsius, degrees Fahrenheit
  • Communication interface Ethernet, USB, RS232
  • Ethernet communication protocols WWW, SNMPv1, XML, DATALINK
  • Alarm protocols E-Mail
  • Power AC adapter 230Vac/5Vdc (neccessary for Ethernet interface)
  • Battery life 3 - 4 weeks
  • Protection class IP20
  • Dimensions (without connectors) 178 x 95 x 37mm, without attached cables
  • Weight (including batteries) approx. 380 g
  • Warranty 3 years


* the features may vary depending on the device type

  • up to 6 hardware inputs for measuring and recording, 16 virtual channels for temperature, humidity, dew point, atmospheric pressure, current 0 - 20 mA and voltage 0 - 10 V (-60 to 140 mV), two-state events, pulses, CO2
  • memory for 1 million values
  • indication of alarm conditions via e-mail, SMS, integrated acoustic siren LEDs, stwo-state output to control other devices
  • analytical software for data processing and configuration - COMET Vision
  • communication interfaces - USB, RS232 and Ethernet (SNMPv1 and XML)


Multilogger M1322 inputs Removable inputs allows connection of:
  • Sensors with woltage output (range 0-10 V; accuracy ±10 mV)
  • Sensors with current output (range 0-20 mA; accuracy ±20 µA)
  • Devices with two-state output (potential-less contact or voltage signal 0-30V); may be applied to input 3 and 4
  • Devices with pulse signal (potential-less contact or voltage signal 0-30V); may be applied to input 4
  • Temperature probes Pt1000 with built-in configuration memory (serie xxx/M)
  • Temperature/relative humidity probes with digital output - DigiS/M, DigiL/M, DIGIH/M
  • The probes are interchangeable without calibration to a specific device and regardless of the length of the cable. The length of the cable can be 1, 2, 5, 10, 15 meters
  • Internal CO2 sensor with range 0-2000 ppm (custom range 0-10.000ppm)


Multilogger - LCD detail Up to 16 variables may be calculated from the four connected probes / sensors. This is the sum of the measured and calculated values. The calculated values can be a further expression of moisture – dew point temperature, absolute humidity, specific humidity, mixing ratio, specific enthalpy. It can be also the result of inter-channel conversions, e.g. the difference of two connected temperature probes.Multilogger LCD display detail.

The measured values are stored in the internal non-volatile memory. Memory capacity is up to 1 million values. Logging mode can be adjusted as non-cyclic, when logging stops after filling the memory, or cyclic, when after fulfilling the memory oldest stored values are overwritten by new ones.

Measured values are displayed on the screen with backlight option and the ability to change the size of display digits


Multilogger - Power Supply Multilogger - Power Supply

Multilogger can be powered by AC adapter or by rechargeable batteries with charging capability. Batteries are always a part of the device (you can also use standard alkaline AA batteries). Batteries power the device for several months.

While using the AC adapter, the batteries provide backup operations and provide recording and measurement during power failure. Thanks to the Ethernet output the device informs about the failure via e-mail message.


Multilogger - Alarm limits

It is possible to set two independent alarm limits for each channel (i.e. measured or calculated value).

Alarm signalization can be acoustic (built-in beeper), optical, sending an e-mail alert or an alarm output. The alarm output is for connecting an external audio or visual alarm.


Multilogger - Alarm limits

Multilogger is always equipped with USB connector for communication, data analysis and also for charging of the rechargeable batteries.

Included Ethernet interface allows to:

  • send an e-mail when an alarm state starts or ends
  • use DATALINK: display current values or download values from memory to COMET Database in your PC. Software COMET Database contains many useful tools for data analysis - graphs, tables, statistics, etc.
  • simple wireless communication with Wi-Fi TP-LINK router
  • third-party applications to read the actual measured values using universal protocols SNMPv1 and XML
  • view current measured values using your web browser


Multilogger - Alarm limits and alarm indication
  • Output can be used for controling other devices when alarm is launched, such as external buzzer, telephone dialer etc.
  • Type of output - open collector transistor
  • Max. switching current - 100 mA
  • Max. voltage on output - 24 V
  • Auxiliary voltage at terminal - +5 V (only when the mains supply is present)
  • Users can receive alarms if the values go outside the paramters set. Alarms are indicated through an internal buzzer , 3 LEDs or email alerts via Ethernet port.


Comet Vision Software (2.2.8080.19661 dbapi 20.1)

Conversions - application for recalculation of values


Terms and Conditions COMET System s.r.o.


Instruction Manual

Instruction Manual - the connection of detectors to the Multilogger M13xx

Quick Start Manual

Declaration of Conformity



CATALOG - Multilogger

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