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Honeywell Sensing & Control 4R NDIR Gas Sensors

Honeywell 4R NDIR Gas Sensors are innovative solutions for flammable hydrocarbon gas sensing. These devices incorporate state-of-the-art optical NDIR technology to deliver a high-performance, precise, and reliable sensor. These devices can manage even in the harshest environments. This sensor joins the extensive line of 4 Series Honeywell gas sensors.

Features

  • Digital interface (sensors have a UART protocol as standard to communicate with the instrument via the chip select option)
  • Enhanced resilience (environmental robustness, for performance in high temperature and humidity)
  • Gas selection (option to select from a range of target hydrocarbon gases, with linearized output for minimal processing)
  • Long life (proven sensing technology, designed to operate and last over ten years)
  • Pre-calibrated (sensors calibrated during manufacturing, and data is written in the sensor)
  • Certified (meets global performance standards in line with ATEX, IEC Ex, and more)

Applications

  • Industrial safety, gas detection, emissions analysis/monitoring, refrigeration, and other relevant gas sensing
  • Measuring concentrations of flammable hydrocarbon gases for analysis, monitoring, and safety

Specifications

  • Measurement
    • The operating principle is Non-Dispersive Infrared (NDIR)
    • Gases detected are methane gas (CH4)
    • 0 to 100% LEL range
    • Accuracy for CH4 and C3H8 is ±2% LEL or ±5% of reading
    • Accuracy for C2H6, C4H10, C5H12, C6H14 is ±5% LEL or ±10% of reading
    • T90 response time is ≤ 30s
    • T50 response time is ≤ 10s
    • 250ppm (0.5 % LEL) resolution
    • < 30s warm-up time
    • Long-time stability at zero is ±5% measuring range or ±10% of reading at 20°C
    • Temp. performance (-20°C to 40°C) ±5% measuring range or ±10% of reading at 20°C
    • Temp. performance (40°C to 60°C) ±20% of reading at 20°C
    • Repeatibility is ±5% LEL or RSD < 5% at 50% LEL
    • Humidity performance is ±4% LEL or ±15% of reading with adjustment at 40°C (test: 20%RH, 50%RH, 90%RH)
    • Measurement interval is a maximum of one sample per second (1Hz)
    • Output (C1N-2654-400) is % LEL linear output compensated for temperature and humidity
    • Output (C1N-2654-40D) is % LEL linear output compensated for temperature, humidity, and pressure
    • UART with Chip Select serial communication
  • Environmental
    • -20°C to 60°C operating temperature range
    • Operating humidity range (C1N-2654-400) is 0%RH to 85%RH (non-condensing)
    • Operating humidity range (C1N-2654-40D) is 0%RH to 100%RH (condensing reduction)
    • Operating pressure range is 800mbar to 1200mbar
    • Recommended storage temperature is 0°C to 40°C
    • Recommended flow rate is 200mL/min
  • Lifetime
    • >10 years in air operating life
    • Warranty is 12 months from the date of dispatch
  • Physical characteristics
    • < 7g weight
    • Contact material (pin) is brass and gold plating
    • Outer plastic body material is black PEI

Product Dimensions

Mechanical Drawing - Honeywell Sensing & Control 4R NDIR Gas Sensors
Published: 2026-03-19 | Updated: 2026-03-24