Tunable Diode Laser (TDL) Gas Analyzers
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Tunable Diode Laser (TDL) Gas Analyzers

Tunable Diode Laser (TDL) Gas Analyzers

Reliable, low-maintenance gas measurement in situ and in extractive applications

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Tunable Diode Laser Gas Analyzers from METTLER TOLEDO

Interference-free, drift-free tunable diode laser technology offers better process control and lower maintenance costs.

However, for rel...

Interference-free, drift-free tunable diode laser technology offers better process control and lower maintenance costs.

However, for reliable measurement with a tunable diode laser gas analyzer, or TDL gas analyzer for short, sometimes the required framework conditions such as minimum optical path length, the availability of a purge gas supply and/or maximum dust load get in the way. 

Acknowledging these constraints, METTLER TOLEDO has developed specific process interface solutions that substantially increase the coverage of possible tunable diode laser gas analysis applications. 

Based on the folded optical path principle, METTLER TOLEDO’s range of compact tunable diode laser spectrometers and unique process adaptions, for process, safety, combustion, and vapor recovery applications are essential instruments for improving your processes:

  • Versatility in monitoring your process
  • Simplicity to ease field operations
  • Performance that gives you a leading edge

METTLER TOLEDO's unique process adaptions, make it possible to use a TDL gas analyzer in applications previously considered impossible for an in situ TDL analyzer.


 
Measure Where it Matters

Measure Where it Matters

A series of process adaptions gives you a range of options to measure in situ, extractive or in cross-pipe installations. All tunable diode laser gas analyzers from METTLER TOLEDO require no alignment, and the standard probe-type analyzers fits in pipes down to DN100 (4"). Other adaptions include designs for DN50-sized small pipes (2"), a filter probe for high-dust or high-condensate applications and a non-purge probe for blanketing applications.

Eliminate the Need for Alignment

Eliminate the Need for Alignment

The GPro® 500 series of tunable diode laser gas analyzers is built on a unique folded-path design. The laser source and detector are located in a single unit on one end of the sensor, and the laser beam is reflected back by a three-sided mirror to the detector, so alignment is always perfect. With our wide array of process adaptions, the GPro 500 can be used in almost all pipes and stacks.

One Unique, Versatile Instrumentation Platform

Using a modular design, the GPro 500 tunable diode laser gas analyzer allows you to select the process adaption that fits your application, and match it with the parameter that you need to measure. We offer sensors that measure  a variety of gases including Carbon Dioxide (CO₂), Carbon Monoxide (CO), Hydrogen Chloride (HCl), Hydrogen Sulfide (H₂S), Moisture, Ammonia (NH₃), Methane (CH₄) and Oxygen (O₂). 

Tangible Performance, Minimal Maintenance

Tangible Performance, Minimal Maintenance

The GPro 500 does not require maintenance-prone extractive and conditioning systems. This means that you receive consistent performance from your tunable diode laser gas analyzer without the downtime and cost associated with these traditional systems. You achieve reliable uptime, critical in safety applications, at a reduced cost of ownership.

Products and Specs

Measure gas where it matters

 
Products and Specs
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Gas Measured
Effective path length
Lower Detection Limit
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Gas MeasuredOxygen
Effective path length50mm - 10m, depending on adaption
Lower Detection Limit100 ppm-v
Measurement range0-100%
Accuracy2% of reading or 100ppm O₂, whichever is greater
LinearityBetter than 1%
Resolution<0…01% vol O₂ (100ppm-v)
DriftNegligible (<2% of measurement range between maintenace intervals)
Sampling rate1 second
Response time (T90)O₂ in N₂ 21%>0% in <2 seconds
Repeatability± 0.25% of reading or 0.05% O₂ (whichever is greater)
Process pressure range0.8 bar - 5 bar (abs)/11.6 psi - 72.52 psi (abs)
Process temperature range0-250°C (23-482°F); Optional(for probe installation)
0-600°C (0-1112°F) with additional thermal barrier
Short descriptionExceptional ease of use and almost zero maintenance
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Gas MeasuredHydrogen chloride
Effective path length50 mm - 10 m, depending on adaption
Lower Detection Limit0.6 ppm-v
Measurement range0-1% under standard conditions
Accuracy2% of reading or 1000 ppm, whichever is greater
LinearityBetter than 1%
Resolution0.6 ppm-v
DriftNegligible (<2% of measurement range between maintenance intervals)
Sampling rate1 second
Response time (T90)HCL in N2 1% to 0% in <4 seconds
Repeatability±0.25% of reading or 3 ppm-v HCl (whichever is greater)
Process pressure range0.8 bar - 3 bar (abs)/11.6 psi - 43 psi (abs)
Process temperature range0-250 °C (23-482 °F); Optional (for probe installation)
0-600 °C (0-1112 °F) with additional thermal barrier
Short descriptionAnalyzer for detection of HCl in a gas stream. Must be paired with a process adaption.
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Gas MeasuredHydrogen sulfide
Effective path length50 mm - 10 m, depending on adaption
Lower Detection Limit20 ppm-v
Measurement range0-50%
Accuracy2% of reading or 1000 ppm, whichever is greater
LinearityBetter than 1%
Resolution20 ppm-v
DriftNegligible (<2% of measurement range between maintenance intervals)
Sampling rate1 second
Response time (T90)H₂S in N₂ 1% to 0% in <4 seconds
Repeatability±0.25% of reading or 100 ppm-v H₂S (whichever is greater)
Process pressure range0.8 bar - 3 bar (abs)/11.6 psi - 29 psi (abs)
Process temperature range0-250 °C (23-482 °F); optional (for probe installation)
0-600 °C (0-1112 °F) with additional thermal barrier
Short descriptionExceptional ease of use and almost zero maintenance
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Gas MeasuredCarbon monoxide
Effective path length50 mm - 10 m, depending on adaption
Lower Detection Limit1 ppm-v
Measurement range0-120,000 ppm (0-2%)
Accuracy2% of reading or 1 ppm, whichever is greater
LinearityBetter than 1%
Resolution1 ppm-v
DriftNegligible (<2% of measurement range between maintenace intervals)
Sampling rate1 second
Response time (T90)CO in N₂ 300 ppm-v to 0% in <4 seconds
Repeatability±0.25% of reading or 5 ppm-v CO (whichever is greater)
Process pressure range0.8 bar - 2 bar (abs)/11.6 psi - 29. psi (abs)
Process temperature range0-250 °C (23-482 °F); optional (for probe installation)
0-600 °C (0-1112 °F) with additional thermal barrier
Short descriptionExceptional ease of use and almost zero maintenance
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Gas MeasuredMoisture / water vapor
Effective path length50 mm - 10 m, depending on adaption
Lower Detection Limit5 ppm-v
Measurement range0-200,000 ppm (0-2%)
Accuracy2% of reading or 10 ppm, whichever is greater
LinearityBetter than 1%
Resolution5 ppm-v
DriftNegligible (<2% of measurement range between maintenance intervals)
Sampling rate1 second
Response time (T90)H₂O in N₂ 1% to 0% in <4 seconds
Repeatability±0.25% of reading or 50 ppm-v H20 (whichever is greater)
Process pressure range0.8 bar - 3 bar (abs)/11.6 psi - 29 psi (abs)
Process temperature range0-250 °C (23-482 °F); optional (for probe installation)
0-600 °C (0-1112 °F) with additional thermal barrier
Short descriptionExceptional ease of use and almost zero maintenance
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Gas MeasuredCarbon monoxide (CO%)
Effective path length50 mm - 10 m, depending on adaption
Lower Detection Limit1500 ppm-v
Measurement range0-100%
Accuracy2% of reading or 1500 ppm, whichever is greater
LinearityBetter than 1%
Resolution1500 ppm-v
DriftNegligible (<2% of measurement range between maintenance intervals)
Sampling rate1 second
Response time (T90)CO in N₂ 300 ppm-v to 0% in <4 seconds
Repeatability±0.25% of reading or 0.75-v CO (whichever is greater)
Process pressure range0.8 bar - 1.5 bar (abs)/11.6 psi - 21.7 psi (abs)
Process temperature range0-250 °C (23-482 °F); Optional (for probe installation) 0-600 °C (0-1112 °F) with additional thermal barrier
Short descriptionExceptional ease of use and almost zero maintenance
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Gas MeasuredCarbon dioxide (CO₂%)
Effective path lengthProbes: 100, 200, 400 mm (3.94", 7.87", 15.75")
Wafer Cell: 50, 80, 100 mm (1.96", 3.15", 3.94")
Extractive cell: 200, 400, 800, 1000mm, 10m.
Lower Detection Limit1000 ppm-v
Measurement range0–100%
Accuracy2% of reading or 1000 ppm, whichever is greater
LinearityBetter than 1%
Resolution1000 ppm-v
DriftNegligible (< 2% of measurement range between maintenance intervals)
Sampling rate1 second
Response time (T90)CO2 in N2 1% to O% in < 4 sec
Repeatability± 0.25% of reading or 5000 ppm-v CO2 (whichever is greater)
Process pressure range0.8 bar – 2 bar (abs)/ 11.6 psi – 29.psi (abs)
Process temperature range0 – + 250 °C (+ 32 –+ 482 °F) Optional (for probe installation) 0 – + 600 °C (0 – +1112 °F) with additional thermal barrier,
0 – + 150 °C (+ 32 –+ 302 °F) (White cell)
Short descriptionExceptional ease of use and almost zero maintenance
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Gas MeasuredCarbon Dioxide (CO₂%) & Carbon Monoxide (CO%)
Effective path length50 mm - 10 m, depending on adaption
Lower Detection Limit1000 ppm-v (CO2)
1500 ppm-v (CO)
Measurement range0-100%
Accuracy2% of reading or 1000ppm, whichever is greater
LinearityBetter than 1%
Resolution1000 ppm-v
DriftNegligible (<2% of measurement range between maintenance intervals)
Sampling rate1 second
Response time (T90)CO₂ in N₂ 1% to 0% in <4 seconds
Repeatability±0.25% of reading or 5000ppm-v CO2 or CO (whichever is greater)
Process pressure range0.8 bar - 2 bar (abs)/11.6 psi - 29 psi (abs)
Process temperature range0-250 °C (23-482 °F); Optional (for probe installation)
0-600 °C (0-1112 °F) with additional thermal barrier
Short descriptionExceptional ease of use and almost zero maintenance
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Gas MeasuredIntegrates with GPro 500 analyzers for Oxygen, CO2, CO, HCl, H2S, Mositure, Methane, Ammonia
Effective path length100, 200, 400mm (3.94", 7.87", 15.75")
Lower Detection LimitBased on analyzer chosen
Short descriptionThis process adaption connects to a Gpro 500 gas analyzer for installation at a standard measurement location
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Gas MeasuredMethane (CH4)
Effective path length50 mm - 10 m, depending on adaption
Lower Detection Limit1 ppm-v
Measurement range0 – 1%
Accuracy2% of reading or 1 ppm, whichever is greater
LinearityBetter than 1%
Resolution1 ppm
DriftNegligible (<2% of measurement range between maintenance intervals)
Sampling rate1 second
Response time (T90)CH4 in N2 1% to 0% in < 4 sec
Repeatability±0.25% of reading or 5 ppm-v CH4 (whichever is greater)
Process pressure range0.8 bar - 3 bar (abs)/11.6 psi - 43 psi (abs)
Process temperature range0-250 °C (23-482 °F); optional (for probe installation)
0-600 °C (0-1112 °F) with additional thermal barrier
Short descriptionExceptional ease of use and almost zero maintenance
See details
Read more See less
Gas MeasuredAmmonia (NH3)
Effective path length50 mm - 10 m, depending on adaption
Lower Detection Limit1 ppm-v
Measurement range0 – 1%
Accuracy2% of reading or 1 ppm, whichever is greater
LinearityBetter than 1%
Resolution1 ppm
DriftNegligible (<2% of measurement range between maintenance intervals)
Sampling rate1 second
Response time (T90)NH3 in N2 1% to 0% in < 4 sec
Repeatability±0.25% of reading or 5 ppm-v NH3 (whichever is greater)
Process pressure range0.8 bar - 3 bar (abs)/11.6 psi - 43 psi (abs)
Process temperature range0-250 °C (23-482 °F); optional (for probe installation)
0-600 °C (0-1112 °F) with additional thermal barrier
Short descriptionExceptional ease of use and almost zero maintenance
Comparison

Documentation

Learn more about our TDL Gas Analyzers

Brochures

Gas Analytics Brochure
Gas Analysis: Rethinking Gas Analytics
Safety, quality, productivity: that’s what’s most important to you. And that’s why our approach to designing analyzers and sensors is based around a s...

White papers

White Paper: TDLs for All Your Processes – Folded-Path Gas Analyzers
TDLs for All Your Processes – Folded-Path Gas Analyzers
Our portfolio of folded-path tunable diode laser (TDL) gas analyzers now has a unique range of process adaptions. Combined, they have opened the door...
No More Purge Gas-New TDLs for Combustion Processes
No More Purge Gas-New TDLs for Combustion Processes
This white paper explains how the new generation of TDLs not only offers exceptional fuel costs savings, but eliminates the need for process side purg...
Measurement of Oxygen Concentration
Measurement of Oxygen Concentration in Blanketing and Inerting Operations
Gaseous oxygen measurement with amperometric sensors is the most direct and easiest solution for protection against oxidation and explosion.
Inerting Made Efficient, Replacing Extractive Oxygen Analyzers
Inerting Made Efficient, Replacing Extractive Oxygen Analyzers
Manufacturing operations must keep output and quality their top priority. Switching from maintenance-intensive on-line extractive systems to a more re...
Measurement of Oxygen Concentration
Measurement of Oxygen Concentration
Gaseous oxygen measurement with amperometric sensors is the most direct and easiest solution for protection against oxidation and explosion.
Polarographic Oxygen Measurement
Polarographic Oxygen Measurement
For the measurement of oxygen in continuous process analysis, several technologies are available.
Minimizing Inerting System Maintenance
Minimizing Inerting System Maintenance
This white paper explains how TDL O₂ sensor can minimize inerting system maintenance & how to integrate them into a DCS system for fully automated oxy...
Gas Analysis Made Easy
Gas Analysis Made Easy
Tunable Diode Laser (TDL) oxygen sensors from METTLER TOLEDO unite the best elements of two technologies to form a highly dependable monitoring system...

Manuals

Safety Manual for TDLS GPro 500 - Tunable Diode Laser Spectrometer
Safety Manual for TDLS GPro 500 - Tunable Diode Laser Spectrometer
This document contains information and safety instructions required to use the GPro 500 with direct analog output option in SIL environments.

Services

Maximum Benefits from the Start

Explore our Services - Tailored to Fit your Equipment

We support and service your measurement equipment through its entire life-cycle, from installation to preventive maintenance and calibration to equipment repair.

Uptime
Support & Repair
Performance
Maintenance & Optimization
Expertise
Training & Consulting
 
 
 
 
 
 
 
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