COMET T3111P – 4-20mA Transmitter, Probe for Compressed Air up to 25 bar, Temperature, Humidity, Dew Point

COMET T3111P – 4–20mA Transmitter with External Probe for Compressed Air up to 25 bar, Temperature –30 to +105 °C, Humidity, Dew Point 

The COMET T3111P is a high‑precision 4–20mA transmitter designed specifically for compressed air applications up to 25 bar, featuring an external hard‑anodized duralumin probe (1‑meter cable, optional 2 or 4 m) for temperature, relative humidity, and dew point. As a true compressed‑air T+RH sensor with an analog, galvanically isolated 4–20mA output, it is the ideal solution for compressors, pneumatic systems, adsorption dryers, refrigeration dryers, process air, or quality control in industrial, automotive, food, pharmaceutical, or workshop environments – perfect for connection to PLCs, controllers, recorders, or BMS systems.

The high‑precision capacitive polymer sensor ensures excellent long‑term stability and accuracy: temperature up to +105 °C (±0.4 °C), humidity 0–100 %RH (±2.5 %RH from 5–95 % at 23 °C). The dew point is calculated with high accuracy (±1.5 °C at +10 °C and higher). All humidity parameters – absolute humidity, specific humidity, mixing ratio, and specific enthalpy – are directly available. The probe is suitable for airflows up to 25 m/s (at 1 bar) or 1 m/s (at 25 bar) and is resistant to condensate and oil mist.

The galvanically isolated 4–20mA output is freely scalable – you can define via PC the measuring range and variable (T, RH, Tdp etc.) to be output. The large dual‑line LCD displays all values clearly. With its robust housing and operating temperature range of –30 to +80 °C, the T3111P is a reliable partner for demanding industrial environments. The 1‑meter cable probe allows optimal placement within pipelines. Power supply 9–30 V DC – simple and flexible.

Why the COMET T3111P is the professional 4–20mA compressed‑air sensor:

• Special probe for compressed air up to 25 bar – hard‑anodized duralumin
• External cable probe 1–4 m – flexible for pipes and confined spaces
• Galvanically isolated 4–20mA output – interference‑free and PLC‑compatible
• High accuracy – Temp. ±0.4 °C | Humidity ±2.5 %RH | Dew point ±1.5 °C
• All humidity parameters integrated – dew point directly available
• Large dual‑line LCD – instant display of all values
• IP65 electronics + IP65 probe – suitable for harsh environments
• Wide supply voltage range – 9–30 V DC
• Long‑term stable and maintenance‑free – with calibration certificate

Technical Data T3111P:

• Temperature range: –30 to +105 °C (±0.4 °C)
• Humidity: 0 to 100 %RH (±2.5 %RH from 5–95 % at 23 °C)
• Dew point: –60 to +80 °C (±1.5 °C at T<25 °C and RH>30 %)
• Probe pressure range: up to 25 bar
• Airflow: up to 25 m/s (1 bar) / 1 m/s (25 bar)
• Output: 4–20 mA, galvanically isolated
• Probe cable length: 1 meter (standard), optional 2 or 4 meters
• Power supply: 9–30 V DC
• Operating temperature: –30 to +80 °C
• Protection rating: IP65 (electronics & probe)
• Warranty: 3 years

Perfectly suited for:

• Compressed air systems & compressors
• Dryers & pneumatic installations
• Industrial & process air monitoring
• Automotive & mechanical engineering
• Food & pharmaceutical production
• Compressed air quality assurance
• Humidity & dew point control up to 25 bar
• 4–20mA connection to PLCs/BMS systems

Installation & Commissioning – Done in Minutes

Mount the electronics housing, install the probe into the compressed air line (e.g. via 1/4" or 1/2" thread), connect power and the 4–20mA loop – done! Configure output parameters via PC (COMET software): define measured variable and range. No recalibration required when replacing the probe.

Available Versions:

• Cable length 1 meter
• Cable length 2 meters
• Cable length 4 meters

Summary:

• Humidity and temperature transmitter
• Temperature and humidity probe made of hard‑anodized duralumin for compressed air up to 25 bar
• Suitable for indoor and outdoor applications
• Integrated sensors for relative humidity and temperature on the cable probe
• Measured values are converted into additional humidity parameters: dew point temperature, absolute humidity, specific humidity, mixing ratio, and specific enthalpy.

Scope of Delivery:

• T3111P – according to selected cable length
• User manual
• Traceable calibration certificate
• Free TSensor software for transmitter configuration