Model 7300​​​​​

Infrared Gas Analyzer​​​​


The 7300 series of non-dispersive infrared (NDIR) gas analyzers feature fast response, high accuracy, sensitivity, stability and excellent linearity. The cost competitive measurement solutions are due in part to the uniquely designed patented IR detector. The heart of these microprocessor-based analyzers is a temperture compensated, hermetically sealed, steady state thermopile detector integrated into an IR photometric bench.​


The 7300 series can be provided in a variety of configurations

  • 7300A - Flush panel or rack mount

  • 7300B - NEMA 4 wall mount (suitable for Div. 2 or Eex(p) purge)

  • 7320 - Full explosion proof design (Class I, Division 1, Group B)

​The design of these analyzers eliminates the traditional motor driven chopper wheel, signal conditioning circuitry and complex optics resulting in a compact and rugged analyzer. The optical detection bench has been qualified for critical life support systms in space suits, shuttles and space station Freedom.



​Analysis Ranges


Range ID

​Typical Gas Analysis Applications
CO2          0-1% to 0-100%
CO            0-5% to 0-100%
CH4          0-10% to 0-100%
C2 to C5   0-5% to 0-100%
(for lower ranges and other gases, contact factory)
Three user programmable ranges with auto-ranging
Ratio of 4:1 for low to high range
(i.e. 0-5% up to 0-20% CO)
Via range ID contacts


​​± 2% of full scale at constant temperature or better


​± 1% of full scale


​± 1% of full scale


​​± 1% of full scale per week at constant temperature

​Response Time

​90% of full scale in less than 5 seconds

​Span Stability

​Less than ± 1% of full scale change per month


​​± 1% of full scale


​4-20 mADC isolated or 0-1 VDC negative ground
Serial Output: RS-232C bi-directional user interface


41° to 113°F (5° to 45°C)


110 VAC or 230 VAC, 50 / 60 Hz (specify at time of order)

​Area ​Classifications

7300A:      Non-hazardous
7300B:      Non-hazardous (can also be purged to meet Div 2 or Eex(p) areas


7300A:      7.5"H x 10.8"W x 13.7"D 
                  (19.1 x 27.4 x 34.8 cm)
7300B:     11.8"H x 20.3"H x 8.9"D
                  (29.9 x 51.6 x 22.6 cm)


  • ​Chemical and petrochemical processes

  • Combustion and flue gas processes

  • Pulp and paper

  • Vapor recovery systems

  • Enhanced oil recovery

  • Food, agriculture, medicine

  • Metals, ceramics and heat treating atmospheres

  • Landfill gas power stations

  • Emissions testing (part of the mobile stations)

  • Carbon dioxide (CO2) scrubber efficiency

  • CO / CO2 / C2H4 monitoring of oxyhydrochlorination​​



​​File S​ize​​​​

​Model 7300 Brochure​



  • ​​​Expanded measurement capability

  • Patented detector design

  • Three programmable ranges with auto-ranging capabilities

  • Auto-calibration software

  • 4-20 mADC isolated and 0-1 VDC outputs​

  • RS-232 bi-directional serial interface 

  • Dual concentration alarms and system failure alarm

  • Self-diagnostic check of system electronics​​