700 Series NDIR/O2 Analyzer

California Analytical Instruments introduces their latest 700 NDIR analyzer...


  • Measures IR from Low ppm up to 100% Full Scale and Oxygen from 0-1% up to 0-100%

  • Multi-Component! Up to three IR channels or two IR channels plus Oxygen

  • Auto Calibration and Ranging

  • Fast Response Time

  • Temperature and Pressure Compensation

  • Comprehensive Diagnostics

  • Output Options: Voltage, Current, RS-232, TCP/IP, MODBUS

  • CE Mark and ETL Listed—Conforms to UL STD 61010-1, Certified to CAN/CSA C22.2 STD No. 610610.1

  • Meets 1065 Requirements


  • Stack Gases (CEM)
  • Combustion Efficiency
  • Turbine/Generator Feedback Control
  • Process Chemical Gas Analysis
  • Personnel Safety
  • Vehicle Emissions
  • Fuel Cell Analysis


  • Internal Sample Pump
  • Sample Flow Control
  • 19 Inch Rack Mount Slides
  • Multiple Inputs


The California Analytical 700 Series NDIR Analyzer is based on the infrared absorption characteristics of gases. Using a single infrared beam to measure gas concentrations, this analyzer produces highly stable and reliable results. A single infrared light beam is modulated by a chopper system and passed thrugh a sample cell of predetermined length containing the gas sample to be analyzed. As the beam passes through the cell, the sample gas absorbs some of its energy. The attenuated beam (transmittance) emerges from the cell and is introduced to the front chamber of a two-chamber infrared microflow detector. The detector is filled with the gas component of interest and consequently the beam experiences further energy absorption. This absorption process increases the pressure in both of the chambers. The differential pressure between the front and rear chambers of the detector causes a slight gas flow between the two chambers. This flow is detected by a mass-flow sensor and is converted into an output signal.

Method of Operation - O2

The California Analytical Instruments oxygen analyzer section utilizes either the paramagnetic or fuel cell method to determine the percent level of oxygen contained in the sample gas. The oxygen level is displayed on the LCD panel in percent concentration.


IR Analysis Method - Non-Dispersive Infrared (NDIR)
NDIR Components - CO / CO2 / CH4 / SO2 / NO* (*NO is available with an external NOx converter)
Detector Type – Microflow
NDIR Ranges – From 0-50 ppm up to 0-100%
Range Ratio – 10:1
Response Time (IR) – 90% of Full Scale in < 1.  Second** **Depending on Cell Length, Flow Rate, and Time Constant
IR Sample Cell – Stainless Steel w/ Replaceable gold cell liner
Resolution – Typically 0.1% of Full Scale
Repeatability – Better than 1.0% of Full Scale
Linearity Better than 1.0% of Full Scale of Factory Calibrated Ranges
Noise – Less than 1% of Full scale of Factory Calibrated Ranges 
Zero & Span Drift – Less than 1% of Full Scale per 24 Hours
Zero & Span Adjustment – Via front panel, TCP/IP or RS-232
Sample Flow Rate – 0.5 to 2.0 LPM
Oxygen Analysis Method – Paramagnetic or Fuel Cell
O2 Ranges – 0-1% (Paramagnetic Only) up to 0-100% O2 Full Scale, Four Definable Ranges
O2 Response Time – T90—2 Seconds Paramag- netic, 16 Seconds Fuel Cell
Outputs available – TCP/IP, RS232, MODBUS,  Four Scalable Analog 0-10V / 4-20mA (Allows Offset & Expandable Range DC Analog Outputs)
Discrete Control – Remote/Local Control, Range Change, Range Sense Mode (All TTL Logic)
Discrete Alarms – (Local & Remote Adjustable)
General Fault/TTL Logic (Ground True) Calibration Failure/TTL Logic (Ground True) Concentration (2 Each) TTL Logic (Ground True)
Digital Diagnostics – Pressure – Pressure Control
Voltages Temperatures – Flow Parameters
Keypad Displays – Factory Settings, TCP/IP address, Passwords(4), Scalable Analog Output Voltages, Full Scale Range Select, Auto Cal Times
Special Features – Auto Ranging, Data Streaming, Auto Calibration (adjustable through internal clock)
Display – 3” x 5” Back lit LCD
Sample Temperature – Up to 50 C, Non-condensing
Ambient Temperature – 5 to 40 C
Ambient Humidity – Less than 90% RH (Non-condensing)
Fittings – 1/4 Inch Tube
Power Requirements – 115/230 (+/- 10%) VAC; 50/60Hz, 300 watts maximum
Dimensions – 51⁄4”Hx19”Wx23”D
Weight – 30-45 lbs. (Depending on configuration)


700 Series NDIR/O2 Analyzer
Item # CAI 700 NDIR/O2 

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