COMET T1110 – 4-20mA Humidity Transmitter 0 to 100% RH (±2.5% RH)

COMET T1110 – 4-20mA Humidity Transmitter 0 to 100 %RH (±2.5 %RH), IP65, galvanically isolated, adjustable 

The COMET T1110 is a robust 4-20mA humidity transmitter with an integrated sensor – the classic and reliable solution for precise relative humidity measurement in outdoor and indoor environments, building automation, BMS systems, warehouses, greenhouses, cold rooms, or process monitoring. With a galvanically isolated current output (4-20 mA) and high long-term stability, it is ideal for connection to PLCs, controllers, recorders, or remote systems – even over long distances without signal loss.

The internal capacitive humidity sensor measures from 0 to 100 %RH with an accuracy of ±2.5 %RH in the range of 5 to 95 %RH at 23 °C and high resolution (0.1 %RH). The sensor is temperature-compensated across the entire range, ensuring stable readings even with large ambient temperature changes. The output is freely scalable – you can define the measuring range and output value via PC (e.g. 4 mA = 0 %RH, 20 mA = 100 %RH). The 75 mm probe allows optimal positioning in airflows or protected outdoor areas.

The weatherproof IP65 housing (electronics) and IP40 sensor provide reliable protection against dust and water jets – perfect for outdoor applications or humid environments (-30 to +80 °C). The galvanic isolation protects against ground loops and interference. The sensor is long-term stable and available with a traceable calibration certificate (according to EN ISO/IEC 17025) – delivering top quality for demanding applications. Power supply 9 to 30 V DC (typ. 24 V) – easy and flexible connection via existing HVAC or central power supply.

Why the COMET T1110 is the professional humidity transmitter:

• Galvanically isolated 4-20mA output – interference-free and PLC-compatible
• High accuracy – ±2.5 %RH from 5 to 95 %RH at 23 °C
• Freely scalable – configurable via PC (measuring range and output)
• 75 mm probe – ideal positioning in airflows or outdoor environments
• IP65 housing – weatherproof for indoor and outdoor use
• Wide supply voltage – 9 to 30 V DC (typ. 24 V)
• Long-term stability and maintenance-free – with calibration certificate
• 3-year warranty

Technical data T1110:

• Humidity measuring range: 0 to 100 %RH (±2.5 %RH from 5 to 95 %RH at 23 °C)
• Resolution: 0.1 %RH
• Output: 4-20 mA, galvanically isolated
• Temperature compensation: across the entire range
• Probe length: 75 mm
• Power supply: 9 to 30 V DC (typ. 24 V)
• Operating temperature: -30 to +80 °C
• Protection rating: IP65 (electronics), IP40 (sensor)
• Dimensions: 88.5 x 170 x 39.5 mm
• Weight: approx. 150 g
• Warranty: 3 years

Perfect for:

• Building automation and BMS systems
• Warehouses and production halls
• Outdoor climate and weather monitoring
• Cold rooms and technical areas
• 4-20mA connection to PLC/BMS
• Integration into existing analog systems
• Simple humidity monitoring without cloud
• Budget projects and standard measuring points

Installation and commissioning – done in minutes

Mount the device on a wall, pole, or pipe, connect power (9 to 30 V DC) and the 4-20mA loop – done! Configure the output via PC (COMET software) – define measuring range and output value. No calibration effort required when replacing the device.

Summary:

• Ambient humidity transmitter (relative humidity)
• For indoor and outdoor use
• Output for relative humidity: 4–20 mA

Scope of supply:

• T1110
• User manual
• Traceable calibration certificate
• Free TSensor software for transmitter configuration