PRELIMINARY - Low-Cost Sensor for Up to Four Digital Probes, Ethernet Output and PoE

The Web Sensor PA8641 is a universal Ethernet sensor designed to connect up to four digital temperature probes or combined temperature and humidity probes.

The device uses an independent bus for each channel, allowing a probe cable length of up to 40 m for each input separately. This allows individual probes to be placed more flexibly and at greater distances.

The device is suitable for monitoring multiple points in a single location, such as server rooms, technical rooms, or warehouses. Like other models, it offers a modern web interface, top-tier security including the option to upload custom certificates for HTTPS and TLS communication, and PoE support.

The device supports automatic detection and replacement of the same type of probes, simplifying maintenance and calibration.

Main Benefits:

Support for external digital temperature and humidity probes on a cable
Allows probe connection up to 40 meters in length
Power supply 5–24 V or PoE (IEEE 802.3af)
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

PA8641
Warranty

3 years

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Technical data

Measured value

Temperature

Relative humidity

TEMPERATURE SENSOR

Measuring range Depending on the connected DSxx probe

Accuracy Depending on the connected DSxx probe

Resolution 0.1 °C

HUMIDITY SENSOR

Measuring range Depending on the connected DSxx probe

Accuracy Depending on the connected DSxx probe

Resolution 0.1% RV

GENERAL TECHNICAL DATA

Operating temperature range -30 to +60 °C

Measurement channels 4× external temperature probe or 1× combined T+RH probe (cable-mounted), CINCH connector

Maximum probe cable length per channel 40 meters

Supported temperature units degrees Celsius (°C), degrees Fahrenheit (°F)

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), SNMP Trap, Syslog

Measurement interval 2 s

Ingress protection (IP rating) IP30

Dimensions 116 × 85 × 42 mm (without connected probe)

Weight 180 g

Warranty 3 roky

Optional accessories and download

Digital temperature probe for "p-line" WebSensor, CINCH connector, direct insertion

code DST/C

Digital temperature probe DSTGL40/C, CINCH connector

Temperature range: -30 to 80°C

code SN189C

Digital temperature probe DSTGL40/C, CINCH connector, cable 2 meters

Temperature range: -30 to 80°C

code SN190C

Digital temperature probe DSTGL40/C, CINCH connector, cable 5 meters

Temperature range: -30 to 80°C

code SN191C

Digital temperature probe DSTGL40/C, CINCH connector, cable 10 meters

Temperature range: -30 to 80°C

code SN192C

Digital temperature probe DSTR162/C, CINCH connector

Temperature range: -30 to 80°C

code SN215C

Digital temperature probe DSTR162/C, CINCH connector, cable 2 meters

Temperature range: -30 to 80°C

code SN216C

Digital temperature probe DSTR162/C, CINCH connector, cable 5 meters

Temperature range: -30 to 80°C

code SN217C

Digital temperature probe DSTR162/C, CINCH connector, cable 10 meters

Temperature range: -30 to 80°C

code SN218C

Digital temperature probe DSTG8/C, CINCH connector

Temperature range: -50 to 125°C

code SN228C

Digital temperature probe DSTG8/C, CINCH connector, cable 2 meters

Temperature range: -50 to 125°C

code SN229C

Digital temperature probe DSTG8/C, CINCH connector, cable 5 meters

Temperature range: -50 to 125°C

code SN230C

Digital temperature probe DSTG8/C, CINCH connector, cable 10 meters

Temperature range: -50 to 125°C

code SN231C

Digital temperature/humidity probe for "p-line" WebSensor, CINCH connector, direct insertion

Temperature range: 0 to 50°C

code DSRH/C

Digital temperature/humidity probe for "p-line" WebSensor, CINCH connector

Temperature range: 0 to 50°C

code DSRH01+

Digital temperature/humidity probe for "p-line" WebSensor, CINCH connector, cable 2 meters

Temperature range: 0 to 50°C

code DSRH02+

Digital temperature/humidity probe for "p-line" WebSensor, CINCH connector, cable 5 meters

Temperature range: 0 to 50°C

code DSRH05+

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

code A1879eu

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

code A1879uk

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

code A1879us

Accredited temperature calibration

code SLU001

Accredited temperature and relative humidity calibration

code SLU003

KIT-GSM with modem

code KIT-GSM-W

300Mbps Wireless N Nano Router

code TL-WIFI

Universal probe holder for easy mounting to rack 19"

code MP047

Wall holder for external probes DIGIL

code SP009

PTFE sensor protection, white

code F5300

COMET Database

code CDB

COMET Cloud

code cloud

COMET Cloud Lite for Android & iOS

code cloud_app

COMET VISION - Analytical Software for Dataloggers and Multiloggers

code CV

Database Viewer for Comet Database

code DBV

COMET Magnetic Foldable Stand

code PPO001

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COMET Cloud

code cloud

COMET Database

code CDB

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code PA8611

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code PA8610

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code W3810

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code U3121G

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code U0141G

Web Sensor with PoE - remote thermometer

code P8610

Web Sensor with PoE - four channels remote thermometer hygrometer

code P8641

WebSensor with PoE - remote thermometer with Ethernet interface

code T4611

PRELIMINARY - Low-Cost Sensor for Up to Four Digital Probes, Ethernet Output and PoE

Main Benefits:

Technical data

Measured value

TEMPERATURE SENSOR

HUMIDITY SENSOR

GENERAL TECHNICAL DATA

Optional accessories and download

Software

Others

Manuals

Catalogs

Related products