Spectrex SafEye Quasar 960

  • Open path NH3 gas detector
  • Fast response T90<10 sec
  • Immunity to false alarm

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Spectrex SafEye Quasar 960 open path UV detection for toxic Ammonia gas with path lengths of up to 200ft (60m).  The Quasar 960 model can be tailored to protect your personnel and high-risk installation. Reliability is critical and is assured with SIL2.

Quasar 960 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 toxic NH3 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


  • Agriculture
  • Food and beverage
  • Chemical
  • Waste Management
  • Water Treatment
  • Pharmaceutical

Order Information

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

Model 961 Detection Range 17-52ft/5-16m
QTU-C111 SafEye Quasar 961 Transmitter + QRU-C211 SafEye Quasar Receiver ATEX/IECEx, M25 connections

Model 962  Detection Range 46-132ft/14-40m
QTU-C211 SafEye Quasar 962 Transmitter + QRU-C211 SafEye Quasar Receiver ATEX/IECEx, M25 connections

Model 963  Detection Range 115-200ft/35-60m
QTU-C311 SafEye Quasar 963 Transmitter+ QRU-C211 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
888847-2 NH3 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

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Additional information

Weight 0.09 kg