Spectrex SafEye Quasar 950

  • Open path H2S gas detector
  • Fast response T90<10 sec
  • Reliable in all weather conditions

In StockMake An Enquiry

Spectrex SafEye Quasar 950 open path UV detection for toxic Hydrogen Sulfide gas with path lengths of up to 200ft (60m).  The Quasar 950 model can be tailored to protect your personnel and high-risk installation. Reliability is critical and is assured with SIL2.

Quasar 950 detectors incorporate heated windows to minimise any effects from condensation, icing, snow and are highly immune to interference from sunlight or any other sources of radiation such as flare stacks, arc welding or lightning. A range of outputs is available including 0-20mA, HART, Modbus RS485 to suit all control systems.


  • Long Range Toxic Gas Detection up to 200ft (60m)
  • Detection of H2S toxic gas
  • High Sensitivity and fast response
  • Heated optics to improve performance in ice, condensation and snow conditions
  • Continuous operation in extreme and harsh environmental conditions
  • Solar blind and immune to industrial environments
  • Withstands extreme vibration conditions
  • Multiple output options for maximum flexibility and compatibility
    • 0-20mA
    • HART Protocol for maintenance and asset management
    •  RS-485, Modbus Compatible
  • Simple, one-person installation, alignment, and calibration
  • Programmable configuration via the handheld unit
  • Fast connection to I.S. approved handheld diagnostic/calibration unit
  • 3mA “maintenance call.”
  • Three-year warranty
  • Hazardous area approvals
    • ATEX & IECEx: Ex II 2 (2) G D. Ex db eb ib [ib Gb] IIB+H2 T4 Gb. Ex tb IIIC T135°C Db
    • TR CU/EAC
    • Inmetro (UL)
  • Reliability SIL2 per IEC61508 (TUV)
  • Housing stainless steel 316L with an electro polish finish


  • Offshore platforms & FPSOs
  • Petrochemical plants
  • Chemical processing plants
  • Gas filling and distribution terminals
  • Gas transport and pipelines
  • Perimeter monitoring

Order Information

All versions including transmitter and receiver with 888270 mount for each.

Model 951  Detection Range 17-52ft/5-16m
QTU-C111 SafEye Quasar 951 Transmitter + QRU-C111 SafEye Quasar Receiver ATEX/IECEx, M25 connections

Model 952  Detection Range 46-132ft/14-40m
QTU-C211 SafEye Quasar 952 Transmitter+ QRU-C111 SafEye Quasar Receiver ATEX/IECEx, M25 connections

Model 953  Detection Range 115-200ft/35-60m
QTU-C-311 SafEye Quasar 953 Transmitter+ QRU-C111 SafEye Quasar Receiver ATEX/IECEx, M25 connections


888270 Tilt Mount, stainless steel (spare)
799225 Pole Mount (U-Bolt 4-5″), Stainless steel
888140 Pole Mount (U-Bolt 2-3″), Stainless steel
799255 Wall Mount, Stainless steel
888263 Sunshade, Stainless steel
888847-1 H2S commissioning Kit complete
790285 Magnetic calibration tool
888815 HART Harness Kit
888810 HART Handheld Diagnostics Kit (ATEX IS)
794079 USB/RS485 Harness Converter Kit
888816 Handheld Harness Kit for Mini Laptop Kit or USB

Enquire About This Product

Title Size
SafEye Quasar 950 Datasheet 602 KB

Additional information

Weight 0.09 kg