COMET T3411 Humidity & Temperature Sensor RS485

COMET T3411 Humidity & Temperature Sensor RS485  

The COMET T3411 is a state-of-the-art programmable transmitter designed for reliable measurement of temperature, relative humidity, and derived humidity parameters such as the dew point. With its robust construction and galvanically isolated RS485 interface, it is perfect for demanding use in building automation, warehouses, production halls, server rooms, or wherever precise and long-term climate monitoring is required. The device measures continuously and accurately with minimal maintenance.

Thanks to the integrated COMET sensor technology, the T3411 always delivers reliable readings that can be read directly via the proven Modbus RTU protocol or other compatible protocols (Advantech-ADAM, ARION, HWg-Poseidon).

The RS485 interface with galvanic isolation ensures interference-free data transmission even over long distances up to 1200 m and allows for easy connection to PLC systems, SCADA, or building management systems. This gives you real-time access to your climate data.

The large, easy-to-read dual-line LCD display optionally shows temperature, relative humidity, or dew point and can be completely switched off to save energy. Configuration is conveniently done via COMET’s free TSensor software, allowing you to set all parameters and perform calibrations. If preferred, many settings can also be made directly via HyperTerminal.

The T3411 is built for long-term continuous use: IP65 protection (electronics housing), durable humidity sensor with stainless-steel mesh filter, an operating temperature range from –30 to +80 °C, and measurement accuracy meeting the highest standards. Whether in cold storage, warm production areas, or humid basements, this transmitter operates reliably and precisely.

Why the COMET T3411 is the perfect choice:

• High-precision measurement: Temperature ±0.4 °C; relative humidity ±2.5 %RH (5–95 % at 23 °C)
• Dew point calculation integrated – instantly available without extra processing
• Galvanically isolated RS485 interface – interference-free, even with long cable runs
• Modbus RTU as standard – ready for use with most systems
• Other protocols available: Advantech-ADAM, ARION, HWg-Poseidon
• Robust & durable: IP65 housing, stainless-steel sensor filter, no moving parts
• Easy wall mounting – just two screws required
• Free TSensor configuration software including calibration function
• Large dual-line display – readings at a glance, switchable for continuous operation
• Wide supply voltage range 9–30 V DC – flexible in use

Technical highlights in detail:

• Temperature range: –30 to +80 °C (resolution 0.1 °C)
• Relative humidity range: 0 to 100 %RH (no permanent condensation)
• Dew point range: –60 to +80 °C with high accuracy (±1.5 °C at T < 25 °C and RH > 30 %)
• Response time: t90 < 30 s (humidity); < 7 min for temperature with stainless-steel filter
• Communication: RS485, up to 115200 Bd; up to 256 devices per bus
• Protocols: Modbus RTU (standard), Advantech-ADAM, ARION, HWg-Poseidon
• Power consumption: max. 0.5 W – extremely efficient
• Protection rating: IP65 (electronics), sensor filter IP40
• Operating temperature: –30 to +80 °C (display auto-off above 70 °C)
• Housing material: ASA (high weather resistance)
• Weight: approx. 150 g (standard version)
• Recommended calibration interval: 1 year

Easy installation – ready instantly

Installation is simple:

Two mounting holes on the housing side, orient the sensor cover downward, lead the cable through the gland, connect the terminals, and you’re done. The terminals open easily with a small screwdriver—saving time and effort. Thanks to the galvanic isolation and high noise immunity of the RS485 line, the device operates reliably even in electrically noisy environments.

Made for professionals – recommended by professionals

Whether you need to monitor a small warehouse or equip a large production building with hundreds of measuring points, the COMET T3411 is the perfect solution. It provides stable, precise readings for years and integrates seamlessly into existing automation systems. Many customers from industry, pharmaceuticals, food storage, and data centers have trusted this series for years—and for good reason.

Summary:

• Ambient temperature and relative humidity sensor.
• Suitable for indoor and outdoor environments.
• Integrated sensors for relative humidity and temperature.
• Measured values are also converted into other humidity parameters: dew point temperature, absolute humidity, specific humidity, mixing ratio, and specific enthalpy.