Spectrex Quasar 900 Series Open Path Gas Detector

Spectrex Quasar 900 Series open-path gas detector with xenon flash lamp, SIL2 approval, HART communication, and wide weather resistance for hazardous areas.


Spectrex Quasar 900 Series Open Path Gas Detector - cover page
Brand
Spectrex
Document type
Product Leaflet
Language
English
Pages
8
File format
PDF
File size
687 KB
Published
05 November, 2026
Updated
05 November, 2026
MD5 checksum
1CAE961629F78F7E29EB4C58636D559B

About this manual

The SafEye Quasar 900 Series is an open-path gas detector using xenon flash lamp technology for reliable detection in all weather conditions. It covers up to 660ft (200m) and detects hydrocarbons including methane to hexane and ethylene. It is approved for hazardous areas with SIL2 reliability, immune to false alarms from sunlight or welding, and features a built-in data logger and HART communication. The unit is designed for easy alignment and commissioning with a telescope and includes a gas library for methane, propane, and ethylene calibration.

The detector is housed in 316L stainless steel, rated for -67°F to +149°F (-55°C to +65°C), and has IP66/IP68 protection. It offers 0-20mA analog output with HART, RS485 Modbus, and a 3-color LED status indicator. Accessories include tilt mounts, HART handhelds, and commissioning kits for setup and diagnostics.

What's inside

  • Open Path Gas Detection
  • Xenon Flash Lamp Technology
  • Hazardous Area Approval
  • SIL2 Reliability
  • HART Communication
  • Gas Library Calibration
  • Heated Optics
  • Installation Options
  • Accessories
  • Commissioning Tools

Specifications

Detection RangeUp to 660ft (200m)
Detected GasesAlkanes (methane to hexane) and ethylene
Response Time3 sec
Minimum Detectable Level0.15 LEL.m
Temperature Range-67°F to +149°F (-55°C to +65°C)
HumidityUp to 95% non-condensing
Output Interface0-20mA analog with HART, RS485 Modbus
Hazardous Area ApprovalATEX/IECEx, FM/FMC, Inmetro
ReliabilitySIL2 (IEC61508)
Enclosure Material316L stainless steel

Frequently asked questions

What gases does the Quasar 900 Series detect?

It detects alkanes (methane to hexane) and ethylene.

What is the detection range of the Quasar 900?

Path lengths can be up to 660ft (200m).

Is the Quasar 900 immune to false alarms?

Yes, it is immune to interference from sunlight, flare stacks, arc welding, or lightning.

What is the minimum detectable level?

0.15 LEL.m.

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