Relative Humidity and Temperature Loggers - Comet

Comet's S3500 range of temperature and humidity data loggers are extremely versatile and cost effective data loggers. They primarily record temperature and humidity, but some models also have 0-5V voltage inputs, which may be used with analog sensors or for recording door open status etc. The temp and humidity sensors can either be built inside the logger, or on an external probe cable. The loggers operate from batteries, and some models have an LCD display.

The loggers normally connect to a PC for configuration and download via USB. However a serial interface is also available, and they are smart enough that when connected to a cellular modem, remote configuration and download over cellular/3G can be done, as well as SMS alerts. Alternatively, Ethernet and WiFi adaptors are also available, making the Comet range one of the most versatile small data loggers on the market.

On this page:

 


Comet Temperature & Humidity Loggers - General Description

Data loggers are designed for recording of temperature or temperature together with signal from a contact. 
Values are stored to a non volatile electronic memory.

 S3120Data transfer to the personal computer for further analysis is performed
via USB, RS232, GSM or Ethernet interface by means of a proper adapter.

These loggers can be accessed using WIFI with the addition of a converter - EKI-1361 - please enquire.

Food and beverages industry (HACCP)
Pharmaceutical industry
HVAC (heating, ventilation, air conditioning, cooling)
Building and energy management
Research and development Laboratories (GLP)
Technological processes and warehouses
Museums, archives, galleries

Features

  • traceable calibration certificate included
  • easy user adjustment and calibration of relative humidity by means of optional accessory and PC software
  • variability of connection to the computer - USB, RS232, Ethernet, GSM modem
  • fast data transfer to the PC (full memory of 32 000 readings for approximately 30s)
  • permanent connection to the PC enabled, data is possible to download even during logging
  • large dual line display with special symbols, switchable
  • optional display of minimum and maximum measured values (reset of min/max memory from PC or by magnet)
  • dual level alarm is enabled for each channel, alarm is indicated by blinking of the value on the LCD display or LED
  • two alarm modes: instant or with memory (detected alarm is indicated till alarm memory is cleared)
  • robust watertight case, easy installation, locking enabled
  • low power consumption - battery life up to 7 years, indication of remaining battery life, easy battery replacement
  • standard temperature sensor is Pt1000
  • combination of measurement of temperature and RH with two user calibrated voltage signals 0-5V
  • also logging mode enabled, when logging runs only, if measured values are out of adjusted alarm limits
  • each logger is possible to describe with text of maximum 32 characters
  • each channel is possible to describe with text of maximum 16 characters
  • password protection is enabled to prevent unauthorized manipulation with logger

Specifications

Operating temperature range - models R312x no display:
Operating temperature range - models S3xxx with display:
Accuracy of temperature measurement - internal sensor:
Accuracy of the S3631 data logger Pt1000 input wo probe:
 
 

Accuracy of relative humidity measurement:
Accuracy of dew point temperature measurement:
Resolution:

Real time clock:
Logging interval:

Display and alarm refresh:
Total memory capacity:
Data logging modes:
 

Dimensions without connectors:
 
Power:
Typical battery life in low power mode (1min):
Typical battery life in standard mode (10 second):
Battery life in continuous online mode with interval 1 min:
Battery life in continuous online mode with interval 10 s:

Protection of loggers with internal sensors:
Protection of loggers S3121, R3121 with probe on the cable:

-30 to +80°C
-30 to +70°C
±0.4°C
±0.2°C from -50 to +100°C
±0.2% from reading from +100 to +260°C
±0.4% from reading from -90 to -50°C

±2.5% RH from 5 to 95% at 23°C
±1.5°C from 30 to 95% RH
0.1°C, 0.1%RH

year, leap year, month, day, hour, minute, second
adjustable from 10s to 24h

every 10 s (every minute in low power mode)
32000 values in non-cyclic mode
non-cyclic – logging stops after filling the memory
cyclic – after filling memory oldest data is overwritten by new

S3xxx loggers with display 93x64x29mm
R312x loggery without display 93x64x26mm
Lithium battery 3.6V, size AA
7 years R312x, 6 years S3120, S3121, S3631, S3541
3 years R312x, 2.5 years S3120, S3121, S3631, S3541
reduced to 70% of the above lives
1 year

IP67, sensors covered with a plastic cover with IP30 protection
IP67, sensors protected with a stainless steel mesh with IP40
protection. Filtering ability 0.025mm.

  Data on Comet Loggers (pdf file, 5 pages, opens in new tab)

 

 

Comet Loggers With Displays

S3120  THERMOMETER-HYGROMETER with internal sensors & display
T+RH, Dew point temperature reading.
temperature -30 to +70°C,   humidity 0 to 100%
Battery included.  FREE WINDOWS SOFTWARE

Need to order USB adapter LP003, or COM adapter LP012 for basic use.

 

S3121  THERMOMETER-HYGROMETER
       including dew point temperature logging. With display.
T+RH  using external T+RH probe on a 1 meter cable.
Probe diameter is 18mm, length 90mm.
Temperature -30 to +105°C*,   Humidity 0 to 100%
* temperatures over +85°C with the limitation specified in graph
Cable lengths 2 and 4 meters available optionally. FREE WINDOWS SOFTWARE  579.00+GST    7/15
 

Need to order USB adapter LP003, or COM adapter LP012 for basic use.


S3631 can measure both internal T+RH, and also external T

S3631  THERMOMETER-HYGROMETER with internal T+RH sensors.
T+RH + T external
Additional connector for external temperature probe.
Alternative display of dew-point temperature, external probe temperature
and the temperature difference of external probe.
Internal -30 to +70°C,   External -90 to +260°C,   Humidity 0 to 100%. FREE WINDOWS SOFTWARE.

Need to order USB adapter LP003, or COM adapter LP012 for basic use.

 

S3541  THERMOMETER-HYGROMETER including dew-point calculation with internal T+RH sensors,
and two Vdc inputs.
T+RH + two 0-5V inputs
Additional Canon 9 pins connector for two signals 0 to 5Vdc (±0.2% FS accuracy).
Need to order connector for connection of input signals (only for model S3541).
Internal -30 to +70°C,  Humidity 0 to 100%.  FREE WINDOWS SOFTWARE included.

Accessories required to be ordered separately:
LP003 USB adapter, or LP012 COM adapter for communications with computer,
K0921 watertight IP67 female connector Canon 9 pins for connection of 0-5V signals or
K0925 connector IP20 female connector Canon 9 pins for connection of 0-5V input signals .

 

 

Comet Loggers Without Displays

R3120  THERMOMETER-HYGROMETER, no display.
T+RH, Dew point temperature reading using internal sensors.
Temperature -30 to +80°C,   Humidity 0 to 100%
Battery included.  FREE WINDOWS SOFTWARE.

Accessories required for communication with computer:
LP012 for COM connection, or LP003 for USB connection.


R3121  THERMOMETER-HYGROMETER including dew point temperature reading.
T+RH,  using external T+RH probe on a 1 meter cable.
Probe diameter is 18mm, length 90mm.
Temperature -30 to +105°C*,   Humidity 0 to 100%
* temperatures over +85 with the limitation specified in graph
Cable lengths 2 and 4 meters available optionally.
Battery included. FREE WINDOWS SOFTWARE.

Accessories for communication with computer: LP003 USB adapter, or LP012 COM adapter.

 

 

Accessories for Comet Loggers

For basic use it is necessary to order adapter or adapter for communication with computer.
A start/stop magnet may be ordered if needed to control logging other than directly from computer.
For model S3541, a connector for the  two 0-5V inputs signals needs to be ordered.

Included accessories:
Traceable calibration certificate from the manufacturer with declared metrological traceability based on requirements
of EN ISO/IEC 17025 standard.
Battery is included.
Free program for Windows is ready to download from www.cometsystem.cz.
Program enables to control all logger functions and viewing and printing of record in numerical and simple graphic format.
It is possible to export logged values to dbf or txt formats for further analysis.

Optional accessories:
SW100 - CD with free PC program
One of the adaptors below is needed for communication with the host computer:
LP012 - COM adapter for communication with personal computer via RS232 serial port
LP003 - USB adapter for communication with personal computer via USB port
LP005 - LAN adapter with cable 50cm for communication with the PC via Ethernet, including ac/dc adapter 230Vac/5Vdc.
LP005-5 - LAN adapter with cable 5m for communication with the PC via Ethernet, including ac/dc adapter 230Vac/5Vdc.

Accessories for wireless communication with loggers via GSM - see below

LP004 - start/stop magnet
MD036 - self adhesive Dual Lock for easy installation
A4203 - spare Lithium battery 3.6V, no leads, size AA

For S3631 it is necessary to order probe with Pt1000 sensor with K1321 connector - symbol /E behind probe name

For S3541 Logger
K0921 - watertight female connector Canon 9 pins for connection of 0-5V signals of S3541 logger, protection IP67
K0925 - female connector Canon 9 pins for connection of input signals of S3541 logger, protection IP20
K0945 - adapter with terminals for easy connection of 0-5V signals of S3541, protection IP20

F5200 - grey sensor cover with filter from stainless steel mesh, filtering ability 0,025mm
F5200B - black sensor cover with filter from stainless steel mesh, filtering ability 0,025mm for S3121, R3121 loggers
F9000 - wall holder with lock

SWR004 - optional software for Windows color print, vertical and time zooming of graphs and other functions

DBL Logger Program - database program for work with data from Comet loggers. Program enables, for example:

To set locally the GSM modem via RS232 link by means of QMS2901 cable.
To view selected channels from any Comet logger together with selected channels of other Comet loggers.

Measurement from different Comet devices is possible to combine in one table or graph.
To choose any time interval for analysis, print or export to PDF - table and graph - see also page 23.

Accessories for humidity adjustment and calibration by the user:
MD046 - vessel for humidity calibration and adjustment
HM023 - set of 5 humidity standards 10% RH with 5 application pads
HM024 - set of 5 humidity standards 80% RH with 5 application pads

 

 

 

 

 

Wireless Comms with Comet Loggers via GSM

FEATURES:
1. Wireless communication with Sxxxx, Rxxxx loggers via GPRS
Remote data download from logger
Logger configuration (setting, erasing of data, etc.)
Reading of actual values (online display mode)
All actions available as via COM/USB adapter
Connection realized via M2M Talk server
Communication via M2M server can be disabled, if data download is not required = saving of cost (no need to pay GPRS data tariff)

2. SMS queries about actual values
Sending of SMS query to modem phone number returns actual values. After receiving of SMS query modem sends required info in SMS.
It is possible to limit phone numbers SMS commands are sent from. Same it is also for configuration-service SMS commands.

3. Alarm SMS messages - modem sends to phone numbers alarm SMS messages:
If upper/lower limit of measured value is exceeded
Information on filling of the logger memory (90% and 100%)
Information on low logger battery or end of estimated battery approaches.
Information on logger on/off.
Error messages (communication error with logger, internal clock error, measured value error)

4. Setting of modem
a) Local - service setting via RS232 link from user program:
     Setting of configuration
     Download and erasing of diagnostic log file from modem
     Upload of new firmware to modem
b) Remote - via M2MTalk server from user program
     Setting of configuration
     Download and erasing of diagnostic log file from modem
     Log out from M2MTalk server
     Restart of modem
c) By means of SMS message
     Update of application in modem
     Detection of description and firmware version in GPRS modem
     Detection of GSM status
     Enable/disable of alarm evaluation
     Setting of GPRS parameters for connection
     Setting of parameters of M2MTalk server
     Log in and log out with M2MTalk server
     Halting or restart of application in modem

Every Sxxxx or Rxxxx datalogger in monitoring system is connected via COM adapter to "its" GSM modem LP040.

It is necessary to order several items from accessories.
Minimum set of one logger connected to GSM contains: Sxxxx or Rxxxx logger, LP002 COM adapter for logger connection to modem,
GSM modem LP040, GSM antenna, Ac/dc adapter 230V-50Hz/24Vdc/24W,    
QMS2901 cable for modem setting,
SWR004 Optional PC program for data loggers or DBL Logger Program - database program for work with data from Comet data loggers, fee for using M2M server - see further.

 

 

 

 

 

 

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