Tunable Laser Gas Analyzer TX-100


The TX-100 Tunable Laser Gas Analyzer simultaneously measures the hydrogen chloride and H2O of the stack gas. Since the single probe method is applied in the optical system of the analyzer, TX-100 can be mounted from one side of the stack. Through this way of installation, several advantages are brought such as excellent performance caused by stabilization of optical axis and easy replacement for an existing analyzer as well as achievement of low cost of ownership. In addition, HORIBA’s unique calibration function enables calibration work without removing the TX-100 from the stack which makes maintenance simpler. TX-100 is suitable for controlling and monitoring of HCl in various industries including refuse incineration facilities, petrochemical plants, or cement factories, etc.


Single probe type optical system

  • Both the laser and the receiver are installed at the same side of the stack
  • Just one flange installation is sufficient for the setup
  • Easy replacement for an existing analyzer requires no additional work
  • Implements calibration while the probe remains inserted into the stack
  • The function to correct continuous moistrue supports high accuracy measurement


HORIBA’s original calibration mechanism

By HORIBA's original calibration system, HCl calibration work can be implemented regardless of the facility's operation status. Auto zero point checking enables stable measurement over a long period of time.
・ Patent acquired:
US patent No. 8934101; China patent No. ZL201280039440.7; Japan patent No.6386607
・ Patent pending: Europe


Zero point checking and measurement are conducted alternately


Calibration is conducted after span gas is introduced to the calibration cell.

Calibration is completed leaving the probe attached in the stack. 

For TX-100, the data management can be selectable from types including Analysis unit display, HMI (Human Machine Interfce) unit, or PC-HMI software.




Manufactured by HORIBA



Tunable Laser Gas Analyzer



Measurment target

HCl and H2O in process gas


HCl, or HCl and H2O simultaneous measurement


NDIR (Tunable Laser Absorption Spectroscopy method)

Measurement type

Probe type

Laser class

CLASS 1 (IEC60825-1:2014)

Protection degree



SUS316, SUS304, BK7, FKM, PTFE, Aluminum alloy

Tube connections

Rc1/8 (Tube of 8 mm O.D. /6 mm I.D.)

External dimensions

Analyzer unit: 358(W) x 517(D) x 453(H) mm
Probe unit
Flange iameter (Max.): Ø235 mm
Length: 1500 mm
Probe diameter: Ø89 mm


Analyzer unit: 19 kg, Probe: 20 kg

Flange specifications


Power supply voltage

24 V DC±10%

Power consumption

Max. 100W


LCD (128 x 64 dots), LED (3 units: Status display)

Display contents

Gas concentration, ransmission, prcess gas temperature, Process gas pressure,



Analog input

Two channels (Process gas temperature, process gas pressure)
4-20 mA (isolated input)

Analog output

Two channels (Process gas concentration*, transmission, process gas temperature, process gas pressure)
4 -20 mA (Isolated output) 
Max. load: 550Ω

Digital input

One channel (External alarm)
Non-voltage digital input (Isolated input) 
Input open signal: 100 kΩ or more
Input close signal: 200 Ω or less

Digital output

Two channels (Warning/Calibration/Warm-up/Maintenance state/Fault)
Relay contact output (Isolated output)
Max. 24V, 1A at each terminal

 *You can select either fixed value or real time HCl correction using H2O concentration.
 -Modbus is a trademark of Schneider Electric Inc.
 -Consult HORIBA if special probe length is required.



Measurement component



Measurement range

0-50,100,200,300,400,500 ppm*1

0-50 vol%

Measured optical 
path length



Within±1.0 % of full scale

Within ±2.0 % of full scale       


Within±1.0 % of full scale

Within ±2.0 % of full scale

Zero drift

±2.0% of full scale / 6 months

Span drift

±2.0% of full scale / 6 months

Data update cycle

Approx. 2sec

calibration cycle

6 months

Calibration method

HCl: Manual calibration using gas cell
H2O: Factory calibration*2


Within±2.0% of full scale
Gas conditions (at standard process gas condition range)

Warm-up time


*1: Select a measurement range.
*2: You can adjust the H2O indicated value to the manual analysis value. Consult HORIBA for more details. 

Usage Conditions

Ambient temperature

-20 ~ 55°C (no direct sun rays, radiant heat and heat conduction from flange)

Ambient humidity

Relative humidity: 90% or less (no condensation)


Ambient criterion or less

Air purge

Instrument air (must not contain oil or mist; no dew formation)
Pressure: 0.2 to 0.25 MPa (This value is supplied pressure to the main unit. In case air passes through the purge unit, the pressure value at the purge unit is 0.2 to 0.9MPa

Air purge flow rate

60 L/min or more (depend on the process gas conditions)


At 1 to 200 Hz, 1.96 m/s2 or less (excluding resonant frequency)

Process gas conditions

Temperature: 150 to 250°C

Pressure: 101.3 ± 10 kPa

Flow speed: 25m/s

Dust: 0.1mg/Nm3 or less


Measurement Techniques

How does the probe type optical system work?

From the same location in the analyzer, the light source and detector are attached to a probe which is inserted into the stack. A mirror installed at the tip of the probe receives and reflects the laser light through the probe, back to the detector.


PC-HMI Software
PC-HMI Software is a free software that can be operated with a Windows PC and is accessible to the analyzer through Ethernet. The screen shows several indications such as concentration, transmittance and trend graph as well as various operations and settings including calibration, etc.

PC operating environment
Before the PC-HMI software is installed into a PC, please confirm that the operating system is under the following conditions;
PC/AT compatible with Windows 7 (32/64 bit)/8.1(32/64 bit)/10(32/64 bit).

How to download
Click "Download TX-100 PC-HMI Software" below, and then the user questionnaire page will show up. Please answer the simple questions. Once questions are answered and "send" button is clicked, the URL to download the software will be sent to your e-mail address which is entered in the equestionnaire page. When URL is clicked, software dawnload process will start. The software is supported in English only.

* This free software is offered only for promotion. HORIBA accepts no responsibility for any damage or loss resulting from download or use of the software.

Download TX-100 PC-HMI Software

Windows is a trademark or registered trademark of Microsoft Corporation in U.S. Japan, and other countries.
Ethernet is a trademark of Fuji Xerox Co., Ltd.