CO2 Process Analyzer – XLE 105-4

The Model XLE 302/112 CO2 Analyzer is economical, reliable and easy to use. The analyzer uses the proven non-dispersive (NDIR) principle to detect and monitor the presence of CO2.  By incorporating two internal active detectors and a reference detector with an infrared source and specific filtering, the carbon dioxide concentrations can be determined.  The operator is provided a continuous measurement of the CO2 concentrations.

The infrared sensor typically lasts 3 years.  The sensor assembly can be easily replaced in the field.

Calibration is fast and simple.  One bottle of CO2 and one bottle of Nitrogen is required.  (See the VIDEOS tab and watch “How to Calibrate CO2 Process Analyzer.)

Full Technical Support

You will find the analyzers are easy to maintain.  Technical support is available via phone or in person by one of our service technicians.


PPM and % Levels
Customer to specify a range and can be field programmable to alarm at any desired set point.

Detection Method

NDIR – Non-dispersive Infrared (Estimated life:  3 Years)

Field replaceable

Continuous Measurement


Simple Calibration

1 CO2 Standard Bottle & 1 N2 Standard Required

Communications Output

4-20 mA (Self Powered)


(See Customization Tab for other options)

Sample Input Pressure

Inlet 10+/-2 PSIG

Response Time


Instrument Accuracy

+/- 5% of Full Scale

Instrument Repeatability

+/- 2%

Current Draw

< 1 A

Operating Temperature

-20°C to 50°C; -40°F to 122°F

  • 0-5000PPM
  • 0-5% CO2
  • 0-20% CO2
  • 0-100% CO2
Communications Output
  • 4-20 Self Powered (Standard)
  • 4-20 Loop Powered
  • 1-5 VDC
  • Modbus via RTU (Standard)
  • Modbus via TCP/IP
Power Input
  • 12 VDC
  • 24 VDC
  • 110 VAC
  • Solar
Alarm Relays

Two Independent SPDT Relays for Low and High Alarm
Relays are set for FAIL SAFE

Alarm Setpoints, Latching, and Non Latching are PLC Programmable

Relay Ratings:

  • 2.5A @ 125v AC
  • 4.0A @ 24v DC
Alarm Delay

An Alarm Delay is PLC Programmable

The delay can be set for 0-90 minutes

Shut-In Valve

Pneumatic solenoid valve or relays to control your shut-in valve

  • NEMA 4X powder coated
    (Dimensions: 12” x 10” x 6” Weight: 20 pounds)
  • Explosion proof, suitable for Class 1, Division 1, Groups B, C, and D
    (Dimensions: 18” x 16” x 12” Weight: 45 pounds)
XLE 302 CO2 Spec Sheet Download
Application Worksheet Download

How to Calibrate our CO2 Process Analyzer