COMET P4151 – Pt1000 Temperature Transmitter with 4-20mA Output for 0 to +35 °C

COMET P4151 – High-accuracy Pt1000 Temperature Transmitter with 4–20 mA Output for 0 to +35 °C (±0.2 °C), IP65, galvanically isolated. Ideal for external Pt1000 probes 

The COMET P4151 is a high-precision Pt1000 temperature transmitter with 4–20 mA output – the ideal solution for accurate temperature measurement using external Pt1000 probes within the narrow range of 0 to +35 °C (±0.2 °C). As a proven industrial transmitter with a galvanically isolated current output, it is perfectly suited for applications demanding maximum accuracy: warehouse and cold storage monitoring, building automation, HVAC systems, server rooms, climate chambers, food and pharmaceutical industries, calibration laboratories – everywhere precise room or process temperature measurement with Pt1000 sensors is required.

The transmitter linearly converts the Pt1000 signal to 4–20 mA for the measuring range 0 to +35 °C with exceptional accuracy of ±0.2 °C. The resolution is 0.1 °C. The output is freely scalable – you can define the desired measuring range and output value via PC (e.g. 4 mA = 0 °C, 20 mA = +35 °C). The weatherproof IP65 enclosure protects against dust and water jets – ideal for humid or dusty environments (ambient temperature −30 to +80 °C). No external probe included – the P4151 connects directly to your Pt1000 probe (2-, 3- or 4‑wire connection).

Galvanic isolation protects against ground loops and interference. The transmitter provides long-term stability and is available with a traceable calibration certificate (according to EN ISO/IEC 17025) – ensuring top quality for critical applications. Power supply 9–30 V DC (typically 24 V) – easy connection to an existing HVAC supply or central power source. The compact design (88.5 × 148 × 39.5 mm) and low weight (approx. 125 g) allow simple wall, cabinet, or pole mounting.

Why the COMET P4151 is the professional high-precision Pt1000 transmitter:

• Pt1000 input 0 to +35 °C – optimized for precise room and storage temperature measurement
• Galvanically isolated 4–20 mA output – interference-proof and PLC-compatible
• Very high accuracy – ±0.2 °C across the entire range
• Free scaling – configurable via PC (measuring range and output)
• IP65 housing – weatherproof for indoor and outdoor use
• Wide supply voltage – 9–30 V DC (typical 24 V)
• Long-term stability and maintenance-free – supplied with calibration certificate

Technical data P4151:

• Temperature measuring range (Pt1000): 0 to +35 °C (±0.2 °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 rating: IP65
• Dimensions: 88.5 × 148 × 39.5 mm
• Weight: approx. 125 g
• Warranty: 3 years

Perfect for:

• Building automation and BMS systems
• Warehouses and cold stores (high accuracy required)
• Server rooms and data centers
• Food and pharmaceutical storage
• Retrofitting existing Pt1000 probes
• 4–20 mA connection to PLC/BMS
• Integration into existing analog systems
• Precise temperature measurement using Pt1000 sensors

Installation & commissioning – completed in minutes

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

Summary:

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

Delivery contents:

• P4151
• User manual
• Traceable calibration certificate
• External probes are not included