METTLER TOLEDO TDL analyzers offer a series of process adaptions to give you a range of options to measure in situ, extractive or in cross-pipe installations. All tunable diode laser analyzers, or TDL analyzers for short, from METTLER TOLEDO require no alignment, and the standard probe-type analyzers fits in pipes down to DN100 (4"). Other adaptions include a TDL analyzer designed for DN50-sized small pipes (2"), a filter probe for high-dust or high-condensate applications and a non-purge probe for blanketing applications.
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Tunable Diode Laser Gas Analyzers from METTLER TOLEDO
Interference-free, drift-free tunable diode laser analyzers offers better process control and lower maintenance costs. However, for reliable measu...
Measure Where it Matters
Eliminate the Need for Alignment
The GPro® 500 series of tunable diode laser spectrometers is built on a unique folded-path design. With the laser source and detector located in a single unit on one end of the sensor, the laser beam is reflected back by a three-sided mirror to the detector, offering perfect alignment. With our wide array of process adaptions, the GPro 500 TDL analyzer can be used in almost all pipes and stacks.
One Unique, Versatile Instrumentation Platform
Using a modular design, the GPro 500 tunable diode laser analyzer allows you to select the process adaption that fits your application, and match it with the parameter that you need to measure. In addition to a TDL oxygen analyzer, 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) and Methane (CH₄).
Tangible Performance, Minimal Maintenance
The GPro 500 TDL spectrometer does not require maintenance-prone sampling and conditioning systems. This means that you receive consistent performance from your tunable diode laser 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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Effective path length
Lower Detection Limit
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
0-600°C (0-1112°F) with additional thermal barrier
Short descriptionExceptional ease of use and almost zero maintenance
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 0.6 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
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.
Gas MeasuredHydrogen sulfide
Effective path length50 mm - 10 m, depending on adaption
Lower Detection Limit20 ppm-v
Measurement range0-50%
Accuracy2% of reading or 20 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
0-600 °C (0-1112 °F) with additional thermal barrier
Short descriptionExceptional ease of use and almost zero maintenance
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
0-600 °C (0-1112 °F) with additional thermal barrier
Short descriptionExceptional ease of use and almost zero maintenance
Gas MeasuredMoisture / water vapor
Effective path length50 mm - 10 m, depending on adaption
Lower Detection Limit5 ppm-v, 1ppm-v
Measurement range0-200,000 ppm (0-2%), 0-100,000 ppm (0-1%)
Accuracy2% of reading or 10 ppm, whichever is greater
LinearityBetter than 1%
Resolution5 ppm-v, 1 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), 0.8 bar - 5 bar (abs)/11.6 psi – 72.5 psi (abs)
Process temperature range0-250 °C (23-482 °F); optional (for probe installation)
0-600 °C (0-1112 °F) with additional thermal barrier
0-600 °C (0-1112 °F) with additional thermal barrier
Short descriptionExceptional ease of use and almost zero maintenance
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
Gas MeasuredCarbon dioxide (CO₂%)
Effective path length50 mm - 10 m, depending on adaption
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 maintenace intervals)
Sampling rate1 second
Response time (T90)CO₂ in N2 300 ppm-v to 0% in <4 seconds
Repeatability±0.25% of reading or 0.75-v CO2 (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
0-600 °C (0-1112 °F) with additional thermal barrier
Short descriptionExceptional ease of use and almost zero maintenance
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)
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
0-600 °C (0-1112 °F) with additional thermal barrier
Short descriptionExceptional ease of use and almost zero maintenance
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
0-600 °C (0-1112 °F) with additional thermal barrier
Short descriptionExceptional ease of use and almost zero maintenance
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
0-600 °C (0-1112 °F) with additional thermal barrier
Short descriptionExceptional ease of use and almost zero maintenance
Gas MeasuredIntegrates with GPro 500 analyzers for Oxygen, CO₂, CO, HCl, H₂S, Moisture, 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
Gas MeasuredIntegrates with GPro 500 analyzers for Oxygen
Effective path length2-6 meters
Lower Detection LimitBased on analyzer chosen
Short descriptionThis process adaption connects to a GPro 500 gas analyzer for installation in wide pipes.
Gas MeasuredIntegrates with GPro 500 analyzers for Oxygen, CO₂, CO, HCl, H₂S, Moisture, Methane, Ammonia
Effective path length200 mm, 400 mm, 800 mm, 1 m, 8 m (7.87", 15.75", 31.50", 39.37", 315")
Lower Detection LimitBased on analyzer chosen
Short descriptionThis process adaption connects to a GPro 500 gas analyzer where conditioning and sampling are required.
Gas MeasuredIntegrates with GPro 500 analyzers for Oxygen, CO₂, CO, HCl, H₂S, Moisture, Methane, Ammonia
Effective path length200, 400, 800 mm (7.87", 15.75", 31.5")
Lower Detection LimitBased on analyzer chosen
Short descriptionThis process adaption connects to a GPro 500 gas analyzer for installation in high particulate content gas streams.
Gas MeasuredIntegrates with GPro 500 analyzers for Oxygen, CO₂, CO, HCl, H₂S, Moisture, Methane, Ammonia
Effective path length200, 400, 800 mm (7.87", 15.75", 31.50")
Lower Detection LimitBased on analyzer chosen
Short descriptionThis process adaption connects to a GPro 500 gas analyzer for installation in low/no flow, clean gas streams.
Gas MeasuredIntegrates with GPro 500 analyzers for Oxygen, CO₂, CO, HCl, H₂S, Moisture, Methane, Ammonia
Effective path length104 mm, 110 mm, 154 mm, 164 mm, 214 mm (4.09", 4.33", 6.06", 6.46", 8.43")
Lower Detection LimitBased on analyzer chosen
Short descriptionThis process adaption connects to a GPro 500 gas analyzer for installation in narrow pipes.
Gas MeasuredCarbon monoxide and methane (CO ppm & CH₄%)
Effective path length50 mm - 10 m, depending on adaption
Lower Detection Limit0-2% (CO); 0-10% (CH₄)
Measurement range0-200°C: 1 ppm-v CO, 5 ppm-v CH₄ / 200 - 600°C: 5 ppm-v (CO), 25 ppm-v (CH₄)
Accuracy2% of reading or 1 ppm (CO) / 25 ppm-v (CH₄), whichever is greater
LinearityBetter than 1%
Resolution1 ppm-v (CO); 3 ppm-v (CH₄)
DriftNegligible (<2% of measurement range between maintenance intervals)
Sampling rate1 second
Response time (T90)CO / CH₄ in N₂ 2% to 0% in < 4 sec
Repeatability± 0.25% of reading or 5 ppm-v (CO); 500 ppm-v (CH₄), 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
Comparison
Documentation
Learn more about our TDL Gas Analyzers
Brochures
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...
Technical Specifications
White papers
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...
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...
Gaseous oxygen measurement with amperometric sensors is the most direct and easiest solution for protection against oxidation and explosion.
Manufacturing operations must keep output and quality their top priority. Switching from maintenance-intensive on-line extractive systems to a more re...
Gaseous oxygen measurement with amperometric sensors is the most direct and easiest solution for protection against oxidation and explosion.
For the measurement of oxygen in continuous process analysis, several technologies are available.
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...
Tunable Diode Laser (TDL) oxygen sensors from METTLER TOLEDO unite the best elements of two technologies to form a highly dependable monitoring system...
Manuals
This document contains information and safety instructions required to use the GPro 500 with direct analog output option in SIL environments.
Datasheets
The GPro 500 TDL moisture sensor is designed for the measurement of H2O levels for corrosion prevention. In situ installation can avoid risks of toxic...
Services
Maximum Benefits from the Start
Services for GPro 500 TDL Gas Analyzers - Ensure Safety in Critical Applications
Demanding processes can have a harsh impact on instrument corrosion or optics contamination. With preventative maintenance driven by ISM, easy parts exchange can be done on your schedule.
