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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 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
  • On request

Technical data

Measured value

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

TEMPERATURE SENSOR

Measuring range -30 to +60 °C
Accuracy ±0.4 °C
Resolution 0.1 °C

HUMIDITY SENSOR

Measuring range 5 to 95 % RH
Accuracy ± 2,5 % RH from 5 to 60 % RH
Resolution 0.1% RH

DEW POINT

Measuring range -60 to +80 °C
Accuracy ±1.6 °C at ambient temprature T < 25°C and RH > 30%
Resolution 0.1 °C

CO2 SENSOR

Measuring range 0 to 5000 ppm
Accuracy ±(50 ppm +3% of reading) at 25 °C and 1013 hPa
Resolution 1 ppm

ATMOSPHERIC PRESSURE SENSOR

Measuring range 600 to 1100 hPa
Accuracy ±1.3 hPa at 23 °C, from 800 to 1100 hPa
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 1 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

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
Price 340 ZAR
AC/DC adapter 230Vac to 5Vdc/2.1 A, UK

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

code A1879uk
Price 340 ZAR
AC/DC adapter 230Vac to 5Vdc/2.1 A, US

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

code A1879us
Price 340 ZAR

Accredited temperature calibration

Accredited temperature calibration

code SLU001
Price 1 480 ZAR
Accredited temperature and relative humidity calibration

Accredited temperature and relative humidity calibration

code SLU003
Price 2 070 ZAR
Accredited atmospheric pressure calibration

Accredited atmospheric pressure calibration

code SLU006
Price 2 100 ZAR
Accredited CO2 calibration

Accredited CO2 calibration

code SLU015
Price 9 930 ZAR

KIT-GSM with modem

KIT-GSM with modem

code KIT-GSM-W
Price 5 850 ZAR
300Mbps Wireless N Nano Router

300Mbps Wireless N Nano Router

code TL-WIFI
Price 1 070 ZAR

Magnetic holder for Web Sensors PAxxxx and TAxxxx

Magnetic holder for Web Sensors PAxxxx and TAxxxx

code SP104
Price On request

sintered bronze sensor cover

sintered bronze sensor cover

code F0000
Price 500 ZAR
plastic sensor protection with stainless filter (gray)

plastic sensor protection with stainless filter (gray)

code F5200
Price 340 ZAR
plastic sensor protection with stainless filter (black)

plastic sensor protection with stainless filter (black)

code F5200B
Price 340 ZAR
PTFE sensor protection, white

PTFE sensor protection, white

code F5300
Price 990 ZAR

COMET Database

COMET Database

code CDB
Price 11 650 ZAR
COMET Cloud

COMET Cloud

code cloud
Price On request
COMET Vision - Software for Dataloggers and Multiloggers

COMET Vision - Software for Dataloggers and Multiloggers

code CV
Price FREE
Database Viewer for Comet Database

Database Viewer for Comet Database

code DBV
Price 2 730 ZAR

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
download-icon Declaration of Conformity
140.71 KB
download-icon Software development kit (SDK) / Popis komunikačních protokolů (SDK)
35.68 KB

Catalogs

download-icon CATALOG - CO2
5.30 MB
download-icon Catalogue Sheets - COMET Premium WebSensors 2.0
1.03 MB

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