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CN Series

FIXED GAS DETECTOR FOR TOXIC GAS & OXYGEN MONITORING

Conspec’s CN Series fixed gas detector is your solution for toxic gas or oxygen detection. Intended for indoor or outdoor use, the CX Series is available with an analog 4-20mA output, dry relay contacts, & Modbus RTU over RS-485 communications.

The CN Series fixed gas detector supports over 35 sensor types giving it the capability to detect over 100 different gases. An optional remote sensor can be placed in potentially harmful areas while the transmitter can be monitored safely. Dry contact relays for 1st level alarm, 2nd level alarm, and fault can be used for alarming or process control. The 4-20mA analog output signal or optional Modbus RS-485 communications can be connected to any existing PLC, DCS, or EMS system.

PRODUCT FEATURES
  • Bright LED Status Indicators – Provide clear, at-a-glance system status to quickly identify alarms and operational conditions.
  • Back-Lit LCD Display – Ensures visibility of real-time readings and system information in all lighting conditions.
  • Long Sensor Life – Designed for extended operational longevity, reducing replacement frequency and minimizing maintenance costs.
  • Automatic Reset After Power Loss/Interruption – Restores normal operation seamlessly, minimizing downtime and manual intervention.
  • Temperature & Humidity Compensated – Maintains accurate gas detection under a wide range of environmental conditions.
  • High Immunity to RFI & EMI – Protects the system from interference caused by radio frequency and electromagnetic sources.
  • One-Year Limited Warranty

Sensor Configuration*

1 factory-calibrated sensor per monitor, including Electrochemical, Catalytic Bead, Infrared, Photo-Ionization, and Thermal Conductivity sensors:

  • Electrochemical Sensors: CO, O2, NO2,
    NO, H2S, and more
  • NDIR Sensors: CO2, CH4
  • Other: NH3, Cl, H2, HCl, O3, SO2


Mechanical

  • Enclosure: NEMA 4X
  • Dimensions: 5 in × 4.5 in × 4 in (127 mm × 114 mm × 102 mm)
  • Weight: approximately 3 lb (1.4 kg)
  • 1 Conduit Entry: 0.75 in (19mm) cable grip


Environmental

  • Operating Temperature: -4°F to +120°F (-20°C to +50°C)
  • Operating Humidity: 10–95% RH non-condensing
  • Temperature Compensation: full range


Electrical

  • Operating Voltage: 12–24 VDC
  • Cable Requirements: 3-Conductor 18 AWG Suggested
  • Current Consumption: 50 mA full scale
  • Output Signal: Linear 4–20 mA


Alarms

Supports 3 alarms with 2 custom alarm points:

  • Alarm Set Point #1: User Defined
  • Alarm Set Point #2: User Defined
  • Sensor Fail Alarm: Programmed

* Additional gas configurations available. contact sales a complete list of part numbers.

  • Carbon Monoxide (CO)
  • Hydrogen Sulfide (H2S)
  • Nitrogen Dioxide (NO2)
  • Carbon Dioxide (CO2)
  • Oxygen (O2)
  • Chlorine (CL2)
  • Ammonia (NH3)
  • Ozone (O3)
  • Nitric Oxide (NO)
  • Propane (C3H8)
  • Hydrogen Cyanide (HCN)
  • Hydrogen Chloride (HCL)
  • Sulfur Dioxide (SO2)
  • Volatile Organic Compounds (VOCs)

Additional gas configurations available. contact sales a complete list of part numbers.

  • Automotive Facilities
  • Factories / Warehouses
  • Boiler / Generating Rooms
  • Water Treatment Facilities
  • Wastewater Treatment Plants
  • Chemical Processing
  • Petrochemical Exploration
  • Pulp & Paper Mills
  • Pharmaceutical Labs
  • Telecommunication Facilities
  • Semiconductor Facilities
  • Power / Cogeneration Plants
  • CNRNP Remote Sensor Enclosure
  • UP99 Hand-Held IR
  • P1879 Calibration Kits

Request CN Series Pricing / Availability

Looking for dependable gas detection and control solutions at the right price, without the long wait? Conspec offers industry-leading turnaround times and competitive pricing on all of our safety solutions. Please share some information about your project and a member of our team will respond at their earliest convenience.

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