Probe type Tunable Diode Laser Spectrometer TDLS8200

 

Simultaneous Multi-Component Measurement with a Single Unit

Measures oxygen (O₂), carbon monoxide (CO), and methane (CH₄) simultaneously

Traditionally, multiple sensors were required to measure multiple components-multiple sensors are complicated to manage, increase maintenance needs, and can cause discrepancies in response time. The TDLS8200 overcomes these challenges by integrating four lenses in one unit for simultaneous multi-component measurement.

Dual Functionality: Modular Design for Multi-Component Measurement

 

Yokogawa’s Proprietary Spectrum Area Method for Achieving High Accuracy

In the conventional wavelength modulation method (2f method), the shape of the absorption peak and the height of the peak are affected by the interference gas. Yokogawa's proprietary spectral area method is virtually unaffected by the interference of other gases and can be measured with high accuracy by temperature and pressure correction.

High Reliability

Stable Measurement of Low Concentrations with a Reference Cell

By incorporating a reference cell, the system continuously detects the gas spectrum with high accuracy, ensuring reliable measurement even at trace levels. It can stably measure concentrations that other products display as 0%.

 

System configuration

 

Seamless User Interface

• Intuitive 7.5” touch-screen HMI configurable for 10 different languages
  ( Japanese, English, German, French, Spanish, Portuguese, Russian, Hungarian, Korean and Chinese )
• Intuitive operability
• Equipped with trend function, improved display function
• CID2/Z2 area rating on the HMI allows for local placement of the primary user interface in the majority of installation areas
• Installation of our free PC-HMI software duplicates the same user interface as the YH8000 HMI for more budget sensitive applications

Single-Sided Installation – Probe Type

Cut Installation Space by More Than Half

Replace Extractive Gas Sampling Analyzers

• Simple replacement from zirconia or other direct-insertion analyzers
• No longer a maintenance scaffold needed on both sides
• No crossover wiring required for light launcher/ detector dedicated cable

Replace of extractive gas sampling analyzer

• Just replace gas sampling probe
• No expendable items such as filter, pump diaphragm

No Light Adjustment Is Required

• Since there is no light launcher side / light detector side, optical alignment is unnecessary

 

Robust Design Ensures Long-Term Stable Measurement

• Engineered for long-term optical axis and path length stability by considering optics, fluid dynamics, heat, and vibration
• Stable measurement even in high-dust environments
• Delivers real-time response comparable to the dual-sided TDLS8000

Application Examples

Boiler combustion control and safety monitoring (O₂/CO measurement)

Challenges When Using Zirconia O₂ and Infrared CO Analyzers

• Sampling system made maintenance cumbersome
• Response delays occurred when using CO concentration for combustion control
• Using two analyzers caused response time discrepancies, making smooth control difficult
• Measurement was limited to a single “point” at the sensor

Ex.1) Oil and LNG-fired Plants

Achieved simultaneous two-component measurement with a single analyzer

Ex.2) Coal-fired Power Plants

Successful continuous operation without maintenance in high-dust environments

Boiler Facilities

[Why the TDLS8200 Was Chosen]

 

Suppress Fluctuations for Precise Measurement – Flowcell Type

TDLS8200 Probe type Tunable Diode Laser Spectrometer – Flowcell type

 

Why Maintenance Costs Are Reduced

Flowcell Sensing Mechanism

 

Compatible with a Wide Dynamic Pressure Range

• Active temperature and pressure compensation available
• Stable measurement even in processes with dynamic pressure fluctuations

 

Reduce System Complexity

Simple Sampling System with Minimal Requirements

No need for moisture removal required in other gas analyzers, simplifying the sampling system
Easier configuration reduces maintenance effort and improves efficiency

 

Heated Flow Cell Prevents Condensation in Measurement Area

Proprietary design ensures stable measurement

 

Double-Tube Structure (Patent Pending)

Equalizes process gas temperature distribution for stable measurement

 

Application Examples

Explosion Prevention in Brine (IM) Electrolysis Plants – O₂ Measurement

Accurate Measurement Even in Hydrogen Environments with Minimal Interference from Coexisting Gases

[ Challenges Using a Magnetic O₂ Analyzer ]

• Difficult to measure O₂ accurately when H₂ (paramagnetic) is present in the background
• Magnetic O₂ analyzers are limited to gas temperatures up to 50°C, making it impossible to prevent condensation through heating
• Frequent maintenance required

[ Why the TDLS8200 Was Chosen ]

 

Small-Diameter Pipe Applications – Reflective Type

Ideal for Chemical Plants and Semiconductor Factories with Numerous Small-Diameter Pipes
Examples:

• Boiler combustion control and safety monitoring in chemical plants (simultaneous O₂ and CO measurement)
• Adjustment of raw gas ratios in chemical plants (O₂)
• Explosion prevention safety monitoring in semiconductor factories (O₂)
• Safety monitoring in chemical plants and semiconductor factories (CH₄)

 

System Configuration Example

Incinerator and Boiler Exhaust Gas Measurement in Small-to-Medium-Sized Chemical Plants (Simultaneous O₂ and CO Measurement)

Because O₂ and CO can be measured simultaneously without sampling, this configuration is ideal for improving response time and reducing maintenance.

 

Application Example

Oxychlorination Process in PVC Monomer Production
– Raw Gas Ratio Adjustment and Explosion Prevention (O₂ Measurement)

Non-contact measurement eliminates concerns about sensor corrosion and allows measurement with moisture present

[ Challenges Before Implementation (Using Paramagnetic O₂ Analyzer) ]

• Even with filters in the sampling system, sensors became contaminated by corrosive gases, requiring frequent replacement
• Insufficient moisture removal during sampling required analyzer recalibration
• Slow response times posed a risk of explosions

[ Why the TDLS8200 Reflective Type Was Chosen ]

• Direct measurement without sampling
• Non-contact measurement eliminates corrosion concerns
• Measures gases with moisture present
• Response time of only 2 seconds improves plant safety
• Minimal maintenance after installation significantly reduces operating costs

 

Solutions and Use Cases

Process Monitoring

For various chemical processes, high-speed online monitoring is essential for safety supervision, such as to prevent explosions. O₂ measurement of process gases using a probe-type laser gas analyzer provides accurate and fast monitoring with simple installation.

• Combustion Efficiency Improvement
• Safety Improvement
• Longer Life time of the coils and coil hangers
• Higher throughput thru optimizing heating

 

Combustion Control

Improving combustion efficiency in furnaces and boilers requires continuous, stable, and fast measurement of oxygen and carbon monoxide in flue gas. The probe-type laser gas analyzer achieves this with easy installation. No sampling system is needed, reducing maintenance requirements.

• Fast Response Analysis
• No Interference Analysis (TruePeak Measurement Technology)
• Internal Reference Cell for Peak Locking during Trace Measurement

 

Major Industries

Oil & gas, petrochemicals, chemicals, electric power, iron and steel, and ceramics

Applications

Heating furnace and boiler combustion control and safety monitoring

TDLS8200 STANDARD SPECIFICATIONS

Measurement object		O2＋CO, O2+CO or CH4, O2, CO, CO or CH4, NH3, HCl
Measurement system		Tunable diode laser spectroscopy
Measured component		Min. range	Max. range
O2		0-1%	0-25%
CO (ppm)		0-200 ppm	0-10,000 ppm
CO or CH4	CO	0-200 ppm	0-10,000 ppm
	CH4	0-5%
NH3		0-30 ppm	0-5,000 ppm
HCl		0-50 ppm	0-5,000 ppm

	Probe Type	Flow Cell Type	Short Flow Cell Type	Reflective Type
Probe Length	0.7 m, 1.0 m, 1.5 m, 2.0 m	-	-	-
Optical Path Length	1 m	1 m	0.4 m	Pipe inner diameter × 2 (*depends on pipe)
Applicable Pipe Diameter	0.65 m or larger	For sampling lines only	For sampling lines only	0.25 m – 0.5 m
Analog Output Signal	5 points, 4–20 mA DC (isolated output, max load 550 Ω) Output types: gas concentration, transmittance, etc.
Digital communication	HART, Ethernet
Digital output	2 points, contact rating 24 V DC, 1 A DO : Function: Activate during Warning / Calibration /Validation / Warm up / Maintenance conditions Fault: Function: Activate during Fault condition or when the system power is off
Power supply	24 V DC ±10%
Protection degree	IP66/NEMA 4X
Process gas condition	Process gas temperature: Max 850°C Process gas pressure: 90 to 500 kPa abs. Process gas flow velocity: 1 to 30 m/sec
Installation condition	Ambient operating temperature: -20 to +55°C Storage temperature: -30 to +70°C Humidity: 0 to 95%RH at 40°C (non-condensing)
Functional safety	IEC61508 SIL2(SC3)
Hazardous area classifications	Division1, Zone1: Explosionproof FM (US, Canada), IECEx, ATEX/UKEX, NEPSI, Korea, Japan

 

PERFORMANCE

Measured component		Repeatability	Linearity
O2		±1% reading or ±0.01% O2, whichever is greater	±1% F.S.
CO (ppm)		±2% reading or ±1 ppm CO, whichever is greater	±1% F.S.
CO or CH4	CO	±2% reading or ±1 ppm CO, whichever is greater	±2% F.S.
	CH4	±4% reading or ±0.02% CH4, whichever is greater	±4% F.S.
NH3		±2% reading or ±1 ppm NH3, whichever is greater	±2% F.S.
HCl		±1% reading or ±2.5 ppm HCl, whichever is greater	±2% F.S.

Measurement conditions: 25°C, 0.1 MPa abs., optical path length 1 m

 

Related products and Maintenance parts

[Related products]

Calibration cell 

[Maintenance parts]

O-ring