COMET P4141 – Pt1000 Temperature Transmitter with 4-20mA Output for -100 to +30 °C

COMET P4141 – Pt1000 Temperature Transmitter with 4–20 mA Output for −100 to +30 °C (±0.3 °C), IP65, galvanically isolated. Ideal for external Pt1000 probes 

The COMET P4141 is a highly accurate Pt1000 temperature transmitter with 4–20 mA output – the perfect solution for precise temperature measurement using external Pt1000 probes in the cold and deep-freeze range from −100 to +30 °C (±0.3 °C). As a proven industrial transmitter with a galvanically isolated current output, it is ideally suited for deep-freeze systems, cold storage facilities, cryogenic applications, refrigeration chains, cold rooms, freezers, pharmaceutical cold storage, food preservation, or heat pumps operating in cooling mode – anywhere Pt1000 sensors are used for low-temperature applications requiring a stable, interference‑free 4–20 mA signal.

The transmitter linearly converts the Pt1000 signal to a 4–20 mA output across the measuring range of −100 to +30 °C with an accuracy of ±0.3 °C. The resolution is 0.1 °C. The output is freely scalable – you can define the desired measuring range and output limits via PC (e.g. 4 mA = −100 °C, 20 mA = +30 °C). The weatherproof IP65 enclosure protects against dust and water jets – perfect for humid cold rooms or outdoor installation (ambient temperature −30 to +80 °C). No external probe included – the P4141 connects directly to your Pt1000 probe (2‑, 3‑, or 4‑wire).

Galvanic isolation protects against ground loops and interference – especially important in humid or electromagnetically stressed refrigeration systems. The transmitter offers long-term stability and is available with a traceable calibration certificate (compliant with EN ISO/IEC 17025) – ensuring maximum quality for critical cold‑temperature applications. Power supply 9–30 V DC (typical 24 V) – easy connection via existing refrigeration power systems or central power supply. Compact design (88.5 × 148 × 39.5 mm) and low weight (approx. 125 g) allow simple mounting on walls, control panels, or cold-room structures.

Why the COMET P4141 is the professional Pt1000 cold‑range transmitter:

• Pt1000 input −100 to +30 °C – ideal for deep-freeze and cryogenic applications
• Galvanically isolated 4–20 mA output – interference‑resistant and PLC‑compatible
• Very high accuracy – ±0.3 °C across the entire low‑temperature range
• Free scaling – configurable via PC (measuring range and output)
• IP65 housing – resistant to humidity for cold rooms and outdoor use
• Wide supply voltage – 9–30 V DC (typical 24 V)
• Long‑term stable and maintenance‑free – supplied with calibration certificate

Technical data P4141:

• Temperature measuring range (Pt1000): −100 to +30 °C (±0.3 °C)
• Resolution: 0.1 °C
• Output: 4–20 mA, galvanically isolated
• Power supply: 9–30 V DC (typical 24 V)
• Operating temperature: −30 to +80 °C
• Protection class: IP65
• Dimensions: 88.5 × 148 × 39.5 mm
• Weight: approx. 125 g
• Warranty: 3 years

Perfect for:

• Deep‑freezing systems and cold storage rooms
• Cryogenic applications and laboratory refrigeration
• Cold‑chain and food storage monitoring
• Pharmaceutical and medical refrigeration
• Retrofitting of existing Pt1000 probes
• 4–20 mA connection to PLC/BMS systems
• Integration into existing analog systems
• Accurate temperature measurement in cold environments

Installation & commissioning – completed in minutes

Mount the unit, connect the Pt1000 probe (2‑, 3‑, or 4‑wire), connect power (9–30 V DC) and the 4–20 mA loop – done! Configure the output (measuring range and output values) via PC using COMET software. No recalibration required when replacing the device.

Summary:

• Temperature transmitter for Pt1000 sensors
• Suitable for indoor and outdoor environments
• For external Pt1000 temperature probes

Delivery contents:

• P4141
• User manual
• Traceable calibration certificate
• External probes are not included