E²T Quasar M8100SM

The QUASAR Model M8100SM-EXP Flare Stack Smoke Monitor provides continuous monitoring of flare stack smoke levels from remote locations up to ¼ mile (400 m) away in nearly any climate condition. This makes it ideal for use in automated smoke control systems designed to keep flare stack smoke emissions within EPA mandated levels.

E2T Quasar M8100PM View

Key Features

  • Flame detection up to 400 m
  • Detection of hydrocarbon as well as hydrogen flames
  • CSA/US and ATEX explosion-proof housing
  • Safety and environmental protection
  • Automatic gain control for adverse weather conditions
  • High quality sight-through optics
  • On-board alarm set point relay
  • Modular opto-electronic package for easy removal from housing
  • IR pyrometer and amplification circuitry in one single module


The QUASAR utilizes dual wavelength infrared detection system and electronic circuitry to automatically compensate for signal variation due to rain, snow or fog. Observed smoke levels are reported via a 4-20 mA signal and an alarm set-point with adjustable timing delay. The QUASAR can be mounted on a control center roof and sighted to monitor smoke levels on distant flare stacks. It is available with a sturdy mounting system designed to resist movement in high winds and provide vernier sighting capabilities for easy target acquisition at long sighting distances.

All electrical and optical components of the QUASAR Model M8100SM-EXP are housed in a single CSA AND CENELEC APPROVED enclosure with a hazardous location classification of Class 1, Division 1, Groups C and D; Class 1, Division 2, Groups A through D; and EExd IIB T4. A single interchangeable modular package mounted inside the explosion-proof enclosure houses all electronic and optical components allowing easy removal and replacement without disturbing any external connections.

The combination of modular features into a single remotely locatable system makes the QUASAR easy to install, maintain and integrate with other systems, and makes it one of the most economical flare stack smoke.


Technical Data



Working Distance:

0 to 1320 feet (400 m) 

Flame Type: Multi-wavelength infrared monitor sensitive to all flame including Hydrogen 
Field of View: Available in 37.5:1, 60:1, 75:1, 150:1 & 300:1 

Output Signal:

4 or 20 mA switched output

(4 mA = flame and 20 mA = no flame)

Alarm Setpoint: Mechanical relay
Response Time: 10 mS
Alarm Output Delay: 2 s to 2 min (Std) 
Sensitivity Adjustment:  Automatic climate compensation and manual gain for easy system setup
Power requirements: Available in 115 VAC or 230 VAC or 24 VDC (Voltages +/- 10%) 115 Watts
Physical Characteristics   

10.5 x 12.5 x 8.5 in (27 x 32 x 22 cm) 

Weight:  48 lbs (22 kg) 

Status Lights:

Green and red 


M-3 heavy duty 360° swivel mount 

Environmental Specifications 

Ambient Temperature Limits:

-40 to 140 °F (-40 to 60 °C) with no cooling and using internal heater

If the equipment is used at the ambient temperature above +60 °C, before turning on the equipment, the cooling system shall be verified that the ambient temperature does not rise above +60 °C

Explosion-Proof Certification: CSA/US: Class 1, Division 1, Groups C and D Class 1, Division 2, Groups A through D, T4 CENELEC: EEx d IIB T4

Environmental Protection: 

Type 4X


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