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Combined Sensor with Two Pt1000 Inputs and One Input for Digital Probes, Ethernet Output and PoE

The TA3645 model represents a hybrid Ethernet sensor that combines two highly accurate analog inputs for Pt1000 resistance probes with one digital input (for T+RH or CO2 probes).

Thanks to this configuration, the TA3645 is a universal monitoring device capable of measuring in the extreme range of -200 °C to +260 °C with an accuracy of ±0.2 °C.

The device is an ideal solution for demanding applications in healthcare or industry: Pt1000 inputs reliably monitor refrigerators, freezers, cryogenic boxes, or ovens, while the digital probe simultaneously monitors the room climate (temperature, humidity, or CO2).

For convenient operation and easy integration, the TA3645 offers a large backlit LCD display, acoustic alarm signaling, and PoE support. It also features a cable resistance compensation function for Pt1000 probes directly from the web interface.

Main Benefits:

  • 2x Pt1000 input + 1x digital T+RH or CO2 probe
  • Extreme temperature measuring range from -200 °C
  • 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
    TA3645
  • Warranty
    3 years
  • On request

Technical data

Measured value

Temperature
Relative humidity
Counted values (dew point…)
CO2

TEMPERATURE SENSOR

Measuring range Depending on the connected Pt1000 probe
Accuracy Depending on the connected Pt1000 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% RH

DEW POINT

Measuring range Depending on the connected DSxx probe
Accuracy Depending on the connected DSxx probe
Resolution 0.1 °C

CO2 SENSOR

Measuring range 0 to 10,000 ppm
Accuracy ±(100 ppm + 5% of reading) at 23 °C and 1,013 hPa
Resolution 1 ppm
CO2 probe cable length 1, 2 or 4 meters

GENERAL TECHNICAL DATA

Operating temperature range -30 to +60 °C
Measurement channels 2× Pt1000 inputs + 1× digital T+RH or CO₂ probe, CINCH / ELKA connectors
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)
Temperature compensation of the humidity sensor across the entire temperature range
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)
Dimensions 116 × 85 × 42 mm (without connected probe)
Weight 220 g
Warranty 3 years

Optional accessories and download

Pt1000TG8/C, temperature probe

Pt1000TG8/C, temperature probe

Temperature range: -80 to 200°C
code SN104C
Price 880 ZAR
Pt1000TG8/C, temperature probe, cable 2 m

Pt1000TG8/C, temperature probe, cable 2 m

Temperature range: -80 to 200°C
code SN105C
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Pt1000TG8/C, temperature probe, cable 5 m

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code SN108C
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Pt1000TG8/C, temperature probe, cable 10 m

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code SN113C
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Pt1000TG7/C, temperature probe

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code SN164C
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Pt1000TG7/C, temperature probe, cable 2 m

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code SN165C
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Pt1000TG7/C, temperature probe, cable 5 m

Pt1000TG7/C, temperature probe, cable 5 m

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code SN166C
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Pt1000TG7/C, temperature probe, cable 10 m

Pt1000TG7/C, temperature probe, cable 10 m

Temperature range: -50 to 200°C
code SN167C
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2301-220/C, temperature probe, cable 1 m

2301-220/C, temperature probe, cable 1 m

Temperature range: -30 to 220°C
code SN168C
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code SN169C
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code SN170C
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Temperature range: -30 to 150°C
code SN175C
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Temperature range: -30 to 80°C
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Temperature range: -50 to 200°C
code SN178C
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2061-200/C, temperature probe, cable 2 m

Temperature range: -50 to 200°C
code SN179C
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2061-200/C, temperature probe, cable 5 m

2061-200/C, temperature probe, cable 5 m

Temperature range: -50 to 200°C
code SN180C
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code SN181C
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code SN182C
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code SN186C
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code SN187C
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code SN188C
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code SN199C
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Temperature range: -30 to 80°C
code SN200C
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Temperature range: -30 to 80°C
code SN201C
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code SN202C
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Temperature range: -30 to 80°C
code SN203C
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code SN204C
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Temperature range: -50 to 250°C
code SN210C
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Temperature range: -50 to 250°C
code SN211C
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Temperature range: -50 to 250°C
code SN212C
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Temperature range: -50 to 250°C
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Temperature range: -190 to 150°C
code SN239C
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Temperature range: -190 to 150°C
code SN240C
Price 2 800 ZAR
Pt1000TR125/C, temperature probe, cable 5 m

Pt1000TR125/C, temperature probe, cable 5 m

Temperature range: -190 to 150°C
code SN241C
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Pt1000TR125/C, temperature probe, cable 10 m

Temperature range: -190 to 150°C
code SN242C
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Temperature range: -50 to 400°C
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Ultra thin temperature probe Pt1000TG3/C, CINCH connector

Temperature range: -50 to 200°C
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Temperature range: -50 to 400°C
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Temperature range: -30 to 180°C
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