Redefining Precision in Gas
Measurement.

In complex monitoring environments where conventional systems struggle, the Direct Optics product line delivers reliable, high-accuracy gas measurement.

Direct-optics. Innovation in Air Emissions Measurement

G60 Dual-Channel NO2-NOX-NO Analyzer

Our G60 CRDS analyzer directly measures NO₂ and NOₓ simultaneously using two independent optical channels, delivering truly continuous measurement by eliminating valve switching, conversion steps, and single-detector artifacts.

This dual-channel design removes delays and non-linear response effects common to traditional NOₓ analyzers, delivering faster, more accurate measurements under real-world emission conditions. Patented self-aligning cavity mirrors ensure long-term optical stability and measurement accuracy while removing challenges typical of traditional CRDS instruments.

  • Dual-channel technology for direct, simultaneous NO2 and NOX measurement
  • Ultra-low detection for precision
  • Wide measurement range
  • Quick interference-free NO2 /NOX readings
  • Fast response time (< 5 seconds to 90%)
  • Remote access to data
  • Customer friendly interface
  • Minimal maintenance
  • Numerous applications
Direct-optics. Innovation in Air Emissions Measurement

Photolytic Converter- PhoNOTM

While NO₂ regulation plays a critical role in protecting health and the environment, conventional measurement approaches can introduce significant error through overestimation. Direct Optics PhoNO delivers accurate, selective NO₂ measurement by separating NO₂ from interfering nitrates – providing data you can defend with confidence.

Nitrogen dioxide (NO2) regulation is essential for public health and the environment, but inaccurate measurements are common and problematic. Analyzers using Heated Metal Converters (HMC) often overestimate NO2 levels. Our Photolytic Converter (PhoNO) is here to change that.

The Direct Optics PhoNO precisely measures NO2 concentrations and selectively separates them from other nitrates present in the air, eliminating the issue of overestimation.

  • Eliminate erroneous NO2 over-reporting
  • Interference-free NO2/NOX measurement
  • Direct replacement for molybdenum/ss converters
  • Greater than 96% conversion efficiency
  • Linear, stable, repeatable conversion
  • Wide range (0.5 ppb – 50 ppm tested)
  • Cost-effective solution
  • Fast response (< 2 seconds)
  • Simple installation
Direct-optics. Innovation in Air Emissions Measurement

Automated Air Sampler

Our Direct Optics Automated Air Sampler offers an effective solution for capturing gases in response to specific events or on preset schedules.

Our Sampler has multi-canister sampling capabilities and enables valuable insights into pollution events and air quality measurement in sensitive environments. With its user-friendly touch screen and intuitive software, our sampler will make capturing gases simple and hassle-free.   

  • Modbus TCP/IP communication
  • Remotely accessible HMI
  • Automatic label printout
  • Onboard UPS
  • Email Notifications

Thermal Oxidizer

Thermal oxidizers perform critical pre-measurement treatment of sample gases. Carefully converting target molecules into analytes to be measured. Materials selection, temperature, scrubbers and residence time are all carefully harmonized to optimize the desired products.

  • We commonly configure Thermal Oxidizers to convert
  • Total Reduced Sulphur (TRS) into SO2
  • H2S (selectively) into SO2
  • NOY into NOX
  • NH3 into NOX

Spare Kits and Parts

Maintain reliable performance and minimize downtime with genuine spare kits and replacement parts designed specifically for our systems. Our spare parts program helps ensure your analyzer continues to operate at peak performance while simplifying maintenance and extending system life.

  • Preventative maintenance kits to support routine servicing schedules
  • Replacement components designed for seamless compatibility and performance
  • Critical spare kits to reduce unplanned downtime
  • Consumables and wear parts to maintain measurement integrity
  • Ongoing product support throughout the lifecycle of your instrument

Services

High-performance instruments require more than advanced technology – they require responsive, knowledgeable support. Our team works closely with customers throughout the lifecycle of their solution to ensure reliable operation, accurate results, and long-term success. Whether delivered remotely or on-site, our service approach is designed to provide timely assistance, practical expertise, and confidence in your measurement system.

  • Remote technical support for fast troubleshooting and issue resolution
  • On-site service and field support for installation, maintenance, and system optimization
  • Commissioning and start-up assistance to ensure successful deployment
  • Application expertise and consultation to help optimize measurement strategies
  • Training and knowledge transfer for operators and technical teams
  • Responsive customer care with direct access to experienced specialists

Field Validation in Progress

NOY Analyzer

A high-sensitivity analyzer designed to measure total reactive nitrogen species (NOy) in the atmosphere.

Ozone (O₃) Analyzer

An instrument for precise measurement of ground-level ozone, one of the most important photochemical pollutants.

Ammonia (NH₃) Analyzer

A sensitive analyzer for detecting atmospheric ammonia, a key precursor in fine particulate matter (PM₂.₅) formation.

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