Methane & Hydrogen Sensor Platform

ANI has developed a sensor based on a microresonator effect that measures methane and hydrogen concentrations up to 100% with excellent linearity and accuracy of 0.25% full scale and overcomes the problems with existing approaches.    

Existing leak detection devices rely upon several known technologies.  The most widely used technology utilizes metal oxide-based sensors.  One advantage of this technology is its relative simplicity and high sensitivity in the ppm concentration range.   However, metal oxide sensors have many disadvantages:    

  • They saturate when concentrations exceed ~1%,
  • They require oxygen and measurement is oxygen concentration dependent, 
  • They require heating up to 200°C-400°C, making this technology not intrinsically safe, and unstable (calibration drift). 
  • They are cross-sensitive to many other hydrocarbons, they are not selective.

Catalytic bead-based sensors also require high temperature operation.   Electrochemical sensors usually suffer from the limited operation temperature range (typically, up to 40°C), limited lifetime, and strong dependence of the sensor response on humidity levels.    

Infrared (IR) based sensors are bulky, expensive and cross- sensitive to other hydrocarbons.

Operating Princile

  • Micro-resonance effect
  • Temperature stabilized oscillators
  • Compensated solid state sensor

Platform Advantages

  • Low cost, even in small scale production
  • Sensor and controller can be very small    
  • Nothing is heated above 50°C    
  • No chemistry or radiation involved    
  • Does not require a sampling system
  • Does not require oxygen 
  • Accuracy ±0.25% of full scale
  • No consumables required    
  • Almost instant response, less than 1 sec 

Applications

  • LEL/LFL and UEL/UFL gas monitors    
  • Leak detection    
  • Analytical measurements    
  • Pipeline backfill monitoring    
  • Binary mixture sensing    
  • Custom applications   
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