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Carbon Dioxide Sensor Model IR-700-CO₂

Brand: Detcon Inc

Model IR-700-CO₂ is a non-intrusive “Smart” sensor designed to detect and monitor carbon dioxide gas in air using miniature non-dispersive Infrared Optical (NDIR) sensor technology. 

Available in a low and a high range version, ranges of detection (by volume) are 0-0.3%, 0-1%, 0-3%, 0-5% (low range version) and 0-10%, 0-25%, 0-50%, and 0-100% (high range version). 

The plug-in, field replaceable detector provides a selective response to CO₂ and features over-sized gold-plated connections that help prevent corrosion. 

The Model 700’s rugged framework includes an electro-polished 316 stainless steel housing with fully encapsulated electronics and dual layer surge protection. 

This innovative design virtually eliminates sensor failure due to water ingress, corrosion, vibration, and transient spikes. 

A primary feature of the Model IR-700-CO₂ is embedded intuitive software that simplifies operator interface by guiding the user through routine calibration, configuration, and fault diagnostic functions using a built-in alpha/numeric display. 

The Model IR700-CO₂ is equipped with standard analog 4-20 mA, and Modbus™ RS-485 outputs. 

Additional integration options include a Remote Alarm Module (RAM) & HART. Detcon’s carbon dioxide gas sensor has an infinite shelf life and is supported by a 5-year pro-rated warranty.
Features
  • Failsafe User-Friendly Interface 
  • LED Display (With Antiglare Cover) 
  • Full Text Display Method 
  • Non-intrusive Interface 
  • Auto Zero/Auto Span 
  • Pre-emptive Fault Diagnostics Environmentally Resistant 
  • Electropolished 316SS Construction 
  • 100% Epoxy Encapsulated Circuitry 
  • I/O Protection 
  • Water-Resistant, Corrosion-Resistant Vibration-Resistant Modular and Serviceable 
  • Modular Design 
  • Plug and Play Components 
  • Quick Thread Release (For Sensor Replacement) 
  • Integral Calibration Port

Specifications

Brand

Sensor Type

  • Continuous Diffusion/Adsorption
  • Non-dispersive Infrared Optical (NDIR) - CO₂
  • Sub-miniature plug-in field replaceable

Sensor Life

  • 5 years typical

Measurement Range (% by volume)

  • 0-0.3, 0-0.5, 0-1, 0-3, 0-5 (low range version)
  • 0-10, 0-15, 0-20, 0-25, 0-50, 0-100 (high range version)

Accuracy/Repeatability

  • ±5% of range

Response Time

  • T50 < 15 seconds, T90 < 40 seconds

Outputs

  • Linear 4-20 mA DC
  • RS-485 MODBUS-RTU

Electrical Classification

  • Explosion proof
  • cCSAus
  • Class I, Division 1, Groups B, C, D (Tamb = -40°C to +75°C)
  • Class I, Zone 1, Group IIB+H2
  • ATEX II 2 G Ex d IIB + H2 T4 Gb (Tamb = -40°C to +70°C)

Ingress Protection

  • NEMA 4X, IP66

Safety Approvals

  • cCSAus
  • ATEX
  • CE Marking

Warranty

  • Plug-in detector - 5 year pro-rated
  • Transmitter - 2 Years

Operating Temperature Range

  • -40°F to +167°F; -40°C to +75°C

Storage Temperature Range

  • -40°F to +167°F; -40°C to +75°C

Operating Humidity Range

  • 0-100% RH non-condensing

Dimensions

  • 7”H x 2.2” Diameter; 178 mm H x 65 mm Diameter (Sensor Assembly only)
  • 11”H x 6.1”W x 3.75”D; 280 mm H x 155 mm W x 96 mm D (with junction box)
  • Mounting holes (J-box) 5.5”; 140mm center to center

Weight

  • 2 lbs; 0.907 kg (sensor only)
  • 6 lbs; 2.72 kg (with Aluminum J-Box)
  • 9 lbs; 4.08kg (with Stainless Steel J-Box)

Power Input

  • 11-30 VDC

Power Consumption

  • Normal operation = 68mA (<1.7 watt)
  • Maximum = 85mA (2 watts)

Inrush Current

  • 0.67A @ 24V

RFI/EMI Protection

  • Complies with EN50270

Analog Output

  • Linear 4-20 mA DC (1,000 ohms max loop load @ 24VDC)
  • 0 mA All Fault Diagnostics
  • 2 mA In-Calibration
  • 4-20 mA 0-100% full-scale
  • 22 mA Over-range condition

Serial RS-485 Output

  • RS-485 Modbus™ RTU

Baud Rate

  • 9600 BPS (9600,N,8,1 Half Duplex)

Status Indicators

  • 4-digit LED display with gas concentration
  • Full-script menu prompts for AutoSpan,
  • Set-up Options, and Fault Reporting

Faults Monitored

  • Loop, Input Voltage, Zero, Sensor, Processor, Memory, Calibration

Cable Requirements

  • Power/Analog 3-wire shielded cable Maximum distance is 13,300 feet with 14 AWG
  • Serial Output 2-wire twisted-pair shielded cable specifically for use with RS-485 installations Maximum distance is 4,000 feet to last sensor

I/O Protection

  • Over-voltage, Miswiring, EMI/RFI Immunity

  • Chemicals 
  • Pesticides 
  • Agriculture & Horticulture 
  • Food & Beverage Bottling Plants 
  • Sewer Entry 
  • Waste Water Treatment Plants 
  • Coal Gasification 
  • Pulp & Paper Mills 
  • Enhanced Oil Recovery
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