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Compact Temperature, Humidity, Barometric Pressure, and CO2 Sensor, Ethernet Output and PoE

Compact Temperature, Humidity, Barometric Pressure, and CO2 Sensor, Ethernet Output and PoE

The TA7640 is the most comprehensive compact sensor in the Web Sensor series. It combines temperature, relative humidity, atmospheric pressure, and CO2 concentration measurement, providing an overview of indoor air quality (IAQ).

A new NDIR module with high accuracy in the common range and the ability to measure up to 10,000 ppm is used for CO2 measurement.

The device is ideal for monitoring indoor air quality in offices, schools, and conference rooms, and for applications requiring comfort and health.

Three-color LED signaling allows use as an air quality 'traffic light' for easy ventilation control.

The TA7640 also calculates variables such as Humidex for assessing thermal comfort. Features include encrypted communication, PoE power, time backup, and the ability to send alarms via email, SNMP trap, or acoustic signaling.

Main Benefits:

  • Comprehensive monitoring of indoor air quality
  • Precise measurement of temperature, humidity, CO2, and barometric pressure
  • Backlit LCD display, acoustic and LED alarm signaling
  • Power supply 5–24 V or PoE
  • Integrated backup memory
  • Modern web interface, IPv4/IPv6 support, Modbus TCP, COMET Cloud, and fully encrypted communication (HTTPS, SNMPv3, TLS)
  • Integrated detachable bracket for easy installation

  • code
    TA7640
  • Warranty
    3 years
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Technical data

Measured value

Temperature
Relative humidity
Counted values (dew point…)
CO2
Atmospheric pressure

TEMPERATURE SENSOR

Measuring range -30 až +60 °C
Accuracy ±0,4 °C
Resolution 0,1 °C

HUMIDITY SENSOR

Measuring range 5 až 95 % RV
Accuracy ± 2,5 % RV v rozsahu 5 až 60 % RV
Resolution 0,1% RV

DEW POINT

Measuring range -60 až +80 °C
Accuracy ±1,6 °C při okolní teplotě T < 25°C a RV > 30%
Resolution 0,1 °C

ATMOSPHERIC PRESSURE SENSOR

Measuring range 0 až 5000 ppm
Accuracy ±(50 ppm +3% měřené hodnoty) při 25 °C a 1013 hPa
Resolution 1 ppm

CO2 SENSOR

Measuring range 600 až 1100 hPa
Accuracy ±(1,3 hPa + 0,06% z nastaveného výstupního rozsahu) při 23 °C od 800 do 1100hPa
Resolution 0,1 hPa

GENERAL TECHNICAL DATA

Operating temperature range -30 to +60 °C
Measurement channels Integrated temperature, humidity, atmospheric pressure and CO2 sensors
Calculated values dew point temperature, absolute humidity, specific humidity, mixing ratio, specific enthalpy, humidex, heat index
Supported temperature units degrees Celsius (°C), degrees Fahrenheit (°F)
Supported atmospheric pressure units hPa, kPa, mbar, mmHg, inHg, inH2O, PSI, oz/in2
Power supply Power over Ethernet (IEEE 802.3af) or 5–24 V DC
Network interface Ethernet
IP support IPv4, IPv6
Communication protocols HTTP(s), Web server (WWW), HTTP GET (JSON, XML), Modbus TCP, SNMPv1, SNMPv2c, SNMPv3
Alarm protocols Email (SMTP), Syslog
Measurement interval 2 s
Ingress protection (IP rating) IP30 (electronics), IP40 (sensors)
Dimensions 116 x 85 x 42 mm; stem 77 x 18 mm
Weight 240 g
Warranty 3 years

Premium Ethernet Sensors with Display and Local Signaling

The TAx6xx series represents a new generation of Web Sensor 2.0 premium sensors. They combine precise measurement, modern network communication, and local monitoring via an LCD display, LED signaling, and an acoustic alarm.

Ideal solution for:

  • server rooms and data centers
  • laboratories and healthcare
  • industrial facilities
  • offices, schools, and public buildings
  • cleanrooms

Why choose TAx6xx?

Local monitoring without a PC

  • Backlit segmented LCD display (4 brightness levels)
  • Display of values, alarms, and IP address
  • Three-color LED signaling (green / yellow / red)
  • Acoustic alarm with local and remote mute options

Advanced next-generation alarms

  • 2 adjustable alarms per channel (no direction limits)
  • System alarms (measurement, time, or configuration error…)
  • Signaling via: o LED o acoustics o e-mail (TLS / STARTTLS) o SNMP trap o Syslog

Calculations and advanced analytics

  • Dew point
  • Absolute humidity
  • Specific humidity
  • Mixing ratio
  • Enthalpy
  • Humidex and Heat Index
  • Inter-channel calculations (e.g., temperature difference, CO₂ difference)

Maximum connectivity and security

  • HTTP / HTTPS (custom certificate upload)
  • SNMP v1 / v2c / v3 (SHA, AES128)
  • Modbus TCP (including alarm mute and limit changes)
  • IPv4 + IPv6
  • COMET Cloud / COMET Database
  • TLS communication
  • 4 user accounts, 3 permission levels
  • Firmware updates via web

Power without compromises

  • 5–24 V DC
  • PoE (IEEE 802.3af)
  • RTC with battery backup
  • Backed-up memory (>2600 records)

Typical applications

Data centers

  • Monitoring of temperature, humidity, and CO₂ with instant LED indication.
  • Laboratories: High-precision Pt1000 inputs, cable compensation, alarms.
  • Schools and offices: CO₂ air quality "traffic light" for ventilation control.
  • Industry: Durable solution with PoE and SCADA integration.

The new platform brings:

  • new compact design
  • removable bracket for easy mounting
  • unified firmware
  • enhanced cybersecurity
  • RTC with battery
  • advanced alarm system

Optional accessories and download

AC/DC adapter 230Vac to 5Vdc/2.1 A, EU

AC/DC adapter 230Vac to 5Vdc/2.1 A, EU

code A1879eu
AC/DC adapter 230Vac to 5Vdc/2.1 A, UK

AC/DC adapter 230Vac to 5Vdc/2.1 A, UK

code A1879uk
AC/DC adapter 230Vac to 5Vdc/2.1 A, US

AC/DC adapter 230Vac to 5Vdc/2.1 A, US

code A1879us

Accredited temperature calibration

Accredited temperature calibration

code SLU001
Accredited temperature and relative humidity calibration

Accredited temperature and relative humidity calibration

code SLU003
Accredited atmospheric pressure calibration

Accredited atmospheric pressure calibration

code SLU006
Accredited CO2 calibration

Accredited CO2 calibration

code SLU015

KIT-GSM with modem

KIT-GSM with modem

code KIT-GSM-W
300Mbps Wireless N Nano Router

300Mbps Wireless N Nano Router

code TL-WIFI

Magnetic holder for Web Sensors PAxxxx and TAxxxx

Magnetic holder for Web Sensors PAxxxx and TAxxxx

code SP104

sintered bronze sensor protection

sintered bronze sensor protection

code F0000
plastic sensor protection with stainless filter (gray)

plastic sensor protection with stainless filter (gray)

code F5200
plastic sensor protection with stainless filter (black)

plastic sensor protection with stainless filter (black)

code F5200B
PTFE sensor protection, white

PTFE sensor protection, white

code F5300

COMET Database

COMET Database

code CDB
COMET Cloud

COMET Cloud

code cloud
COMET Cloud Lite for Android & iOS

COMET Cloud Lite for Android & iOS

code cloud_app
COMET VISION - Analytical Software for Dataloggers and Multiloggers

COMET VISION - Analytical Software for Dataloggers and Multiloggers

code CV
Database Viewer for Comet Database

Database Viewer for Comet Database

code DBV

COMET presentation case for samples

COMET presentation case for samples

code BM512
COMET Magnetic Foldable Stand

COMET Magnetic Foldable Stand

code PPO001

Software

download-icon Comet Database One Click Installer (21.1-V)
487.31 MB
download-icon Database Viewer 3.20.0.0 dbapi 21.1
24.33 MB
download-icon Conversions - application for recalculation of values
694.50 KB
download-icon COMET Cloud Lite - Android (Google Play)
download-icon COMET Cloud Lite - iOS (App Store)

Others

download-icon Terms and Conditions COMET System s.r.o.
133.12 KB

Manuals

download-icon Quick Start Manual
881.51 KB

Catalogs

download-icon CATALOG - CO2
5.30 MB
download-icon CATALOG - WebSensor with Ethernet output
4.06 MB
download-icon Catalogue Sheets - COMET Premium WebSensors 2.0
107.88 KB

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We produce

Leading manufacturer of temperature, humidity, atmospheric pressure, carbon dioxide CO2 transmitters, data loggers, monitoring systems, data acquisiton systems, thermometers, hygrometers, barometers. Production includes data acquisition systems, humidity, temperature, CO2 transmitters and portable thermometers, hygrometers, barometers, CO2 meters. Instruments are designed for accurate measurement and for monitoring environmental conditions.

All instruments come with included traceable calibration certificate with declared metrological traceability of etalons based on requirements of EN ISO/IEC 17025 standard.

 

 

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