Data Logger Comet T8448 – CO2 Concentration and Temperature Transmitter with RS485 Output, Built-in Sensors

• Determines the quality of the interior climate
• Can optimize the ventilation for the creation of a healthy interior climate
• Able to meet the demanding requirements for outdoor use
• Automatically compensates for aging of the sensor
• Sensor is resistant against pollution and provides maintenance-free operation and excellent long-term stability

CO2 – carbon dioxide level and temperature sensor.

CO2 concentration and temperature transmitter with serial RS485 output are specially designed for use in exacting interiors in building energy management and HVAC systems. It designed for easy installation on ordinary KU68 wiring boxes for household switches and sockets.

Large dual line LCD is possible to switch off.

Computerized design ensures long-term stability and fails indication. Transmitter is designed for use in a non-aggressive environment.

The CO2 – carbon dioxide level is recently regarded as an important parameter that substantially determines the quality of the interior climate. Especially in buildings where many people gather, such as meeting rooms, hospitals, schools, cinemas, theatres, and care centres. With the help of CO2 sensor engineers, technical advisors, environmental experts, and health specialists can optimize the ventilation for the creation of a healthy interior climate.

Method of CO2 sensor multipoint calibration leads to excellent accuracy measurements of CO2 in the entire operating temperature range. With this sensor is the device able to meet the demanding requirements for outdoor use. The measurement principle is based on the NDIR principle with dual-wavelength, which automatically compensates for the aging of the sensor. The sensor is resistant against pollution and provides maintenance-free operation and excellent long-term stability.

Transmitter contains a microprocessor-based control circuitry in an ABS plastic case with connection terminals.

The CO2 concentration and temperature sensors are built inside the case.

Large dual line LCD is an advantage. Display is possible to switch off. Computerized design ensures maximum long-term stability and failure indication.

Transmitter circuitry is galvanically isolated from power circuitry to prevent collision in RS485 network.

Serial output RS485 – transmitter works with ModBus RTU communication protocol or with Advantech ADAM compatible protocol. Protocol is user selectable in special configuration mode by means of the PC. Serial link enables to read actual readings and modify transmitter configuration. Instrument works always in slave mode, i.e. responds only to master device query. Transmitters have the address space available from 1 to 255. Communication speed is 110 to 115200Bd.

Applications – Measuring and Control of Air Humidity

• Building HVAC management
• Climate technology
• Schools, universities
• Meeting rooms, hospitals, cinemas, theatres
• Weather stations

Software

• Comet Database
  • Complex solution for data acquisition and analysis. Easy to use and high flexible Database software for Comet Transmitters and Regulators.
• Sensor RS485/232 utility
  • Allows communication of sensors with RS485/RS232 output and sending data to Comet Database.
• T-Sensor software
  • Free configuration utility for Comet Transmitters and Regulators.
• SensorReader software
  • Basic data acquisition utility for Comet Transmitters and Regulators. Software is free for download.
• Programmable regulators
  • With RS485 galvanic isolated serial interface are designed to measure temperature, relative humidity, and barometric pressure of air in a non-aggressive environment, to alarm indication, and to control external devices. Three galvanic no isolated binary inputs are intended for the detection of binary signals. Regulators are available in wall-mount, duct-mount versions, or with probe on a cable. Type H3431P is designed for measurement the temperature and relative humidity of compressed air.
• The function of two output relays
  • Can be set from the regulator keyboard (or from the computer) and using the jumpers. You can assign one of the measured or computed value (dew point temperature, absolute humidity, specific humidity mixing ratio and specific enthalpy) to each relay. The setting of delay, hysteresis, and audible alarm is enabled for each relay. The status of output relays can be controlled remotely via RS485 link too. Devices are equipped with a four-button keyboard and two-line LCD display.
• Regulators support
  • Modbus RTU protocol and protocol are compatible with standard Advantech-ADAM.