H2S H2O O2 Online Process Analyzer – XLE 106-1-2-3

H2S Monitoring Made Simple

Choose Texas Analytical Controls for reliable, economical H2S monitoring. With two H2S sensors, the TAC analyzer is your first choice for reliable H2S monitoring in the field.

If the output of one sensor fails, you can easily disable it.  The analyzer will continue to operate reliably, assuring you of consistent H2S monitoring over time.

Easy to Operate and Maintain

The TAC analyzer outshines the competition when it comes to ease of operation and maintenance.

Sensors typically last a full year and can be changed in just a few minutes.  No special tools are required.

Calibration is simple and can be done in less than six minutes. Calibration can be set up to occur automatically, reducing the time required in the field, or can be performed manually.

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.

We have updated our analyzers so that replacing H2S sensors are done by removing just one thumbscrew.

Click “VIDEOS” tab and watch “How to Replace H2S Sensors”

The analyzer will display “Sensor Weak” when the H2S sensors are 75% used.  This new feature provides the operator a warning to change the sensors.

A bump test can be performed to verify readings without removing the sample line.  This also saves the operator from completing a full calibration that takes 10 minutes.

Displays Historical Trend of H2S Readings within the previous hour

The display will read “Flow Fail.”  If the regulators and the flow meter(s) are not working properly and the sample to the analyzer is obstructed.

The SD memory card is used to store Historical Calibration and Alarm Data.  Each analyzer has the ability to be given a Name or ID.  The selected ID name will also be displayed when downloading data from SD card to a spreadsheet.


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

  • H2S 0-10,25,50 and 100PPM. (% level is also available)
  • H2O 0-10, 0-20 LBS (other ranges available)
  • O2 0-100 PPM (Customer specify range)
Detection Method

H2S- Electro-chemical (Estimated life: 1 Year)

H2O- H2O- Thermoset Polymer Sensor (Estimated life: 2 Years)

O2- Micro Fuel Cell (Estimated life: 1 Year)


An LED indicator on the front panel illuminates when the analyzer is in calibration mode.

Display shows “Cal Complete” after a successful calibration

Calibration can be performed Automatically or Manually

Click “VIDEOS” tab to watch how to calibrate our analyzers

Communications Output

4-20 mA (Self Powered)


(See Customization Tab for other options)

Sample Input Pressure

Inlet 10 +/-2 PSIG

Response Time

< 60 Seconds

Instrument Accuracy

+/-5% of the Full Scale

Instrument Repeatability

+/- 2%

Current Draw

< 1 A

Operating Temperature

-20°C to 50°C; -40°F to 122°F



  • 0-5 PPM
  • 0-10 PPM
  • 0-20 PPM
  • 0-50 PPM
  • 0-100 PPM


  • 0-500 PPM
  • 0-1000 PPM
  • 0-3000 PPM


  • 0-5000 PPM
  • 0-10000 PPM
  • 0-2%
  • 0-5 %
  • 0-10%
  • 0-20 %

(Customer specifies desired range in PPM or %)

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 Panels
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 an external 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 106-1-2-3 H2S H2O O2 Spec Sheet Download
Flow Diagram- H2S Download
Application Worksheet Download

How to Calibrate our H2S Process Analyzers

How to Replace H2S Sensors