Ultrasonic Hydrogen Leak Detector Observer® i


  • Ultrasonic Hydrogen Leak detector detects pressurized gas leaks at the speed of sound utilizing Gassonic technology
  • ANN technology distinguishes real gas leak noise from background noise, suppressing false alarm sources
  • Does not require in-field training, fully operational after installation
  • Detects gas leaks from 2 BAR (29 psi) pressure for rapid detection of small leaks
  • Patented Senssonic™ self-test ensures full failsafe operation

Add to compare

Ultrasonic Hydrogen Leak Detector Observer-i

  • The OBSERVER-i is a third generation ultrasonic gas leak detector (UGLD) for the rapid detection of pressurized gas leaks. It utilizes the advanced acoustic and patented Artificial Neural Network (ANN) technology to only detect gas leaks while suppressing unwanted background noise, and incorporates the patented Senssonic™ self-test system for failsafe operations.
  • With ANN technology, the OBSERVER-i makes it possible to fully analyze the sound spectrum as low as 12 kHz since common high pass filters are not used. This provides a broader leak detection range which also increases sensitivity to smaller gas leaks, without interference from unwanted background noise.
  • ANN technology enables the OBSERVER-i to be installed without time consuming 'training' sequences, and provides industry-leading detection distance, with unprecedented suppression of false alarms. In addition, ANN technology ensures that the OBSERVER-i has the same gas leak detection coverage in high and low noise areas. The device requires no alarm set points or trigger levels to be configured, nor do these alarm parameters need to be adjusted if background ultrasound were to increase or decrease over time.
  • The OBSERVER-i is backwards compatible with earlier versions of the Observer by means of the Classic Mode setting wherein ANN is disabled and the legacy electrical interface is used.
  • The OBSERVER-i features the patented Senssonic™ self-test function. This well-proven self-test checks the device’s electrical integrity and microphone every 15 minutes and ensures the OBSERVER-i is operational at all times. The microphone and the microphone windscreen are constantly monitored to ensure that the detector always has optimal sensitivity and detection coverage.OBSERVER-i also comes with standard industrial user and communication interfaces that provide flexible integration in a broad range of applications. This user manual describes the installation, operation, and maintenance of the OBSERVER-i to ensure its optimal performance.


  • Artificial Neural Network (ANN): Improved detection range and background noise rejection prevents false alarms
  • SenssonicTM integrated acoustic self-test: Failsafe operation
  • One-person acoustic sound check with traceable portable test unit: High reliability and trouble free maintenance
  • HART and Modbus: Provides complete status and control capability in the control room
  • Event logging: Stores fault, sound check, calibration, and alarm event history
  • Detects gas leaks from 2 BAR (29 psi) pressure: Very small gas leaks can be detected quickly

Performance and Certifications

  • The main advantage using ultrasonic gas leak detectors is that the detector does not need to wait for gas accumulation, instead it responds instantly, in distances up to 28 meters, when a gas leak occurs.
  • The OBSERVER-i is suitable in all pressurized gas installations, from 2 BAR (29 psi) or more, where the escaping gas is in a gaseous state when it leaks.
  • The OBSERVER-i is certified to ATEX, IECEx, FM, CSA, HART, and IEC 61508 standards.
  • The detector housing is cast AISI 316L, acid-proof stainless steel and the ingress protection is IP66 with a NEMA rating of Type 4X

Watch our product video

Application areas

  • The OBSERVER-i detects leaks from pressurized gas systems by sensing the airborne ultrasound produced by gas escaping from the leak.
  • This detection method is omni-directional, functional in extreme weather conditions, and ideal for fast monitoring leaks from valves and flanges in complex pipeline systems, both onshore and offshore.

Easy use and testing

MSA Hydrogen detector OBSERVER-i_Use_Testing

Operating manual

  • Visit the download section of this page to see all the documentation offered.
  • You can also directly jump into our the OBSERVER-i operating manual if you want to know all the details.
  • A more efficient way is to contact! Fill out the contact form and we will address your any questions you may have.

Contact us!

  • Your success needs to be safe! We are capable of securing your safety success.
Type of input current DC
Brand MSA
Max Input Voltage (in V) 36
Min Input Voltage (in V) 15
Electronic Control Interface HART, Modbus
Ingress Protection Rating IP66
Compliant with ATEX, CE, CSA, FM, IEC 61508 (SIL 3), IECEx
Max Ambient Temperature (in °C) 60
Min Ambient Temperature (in °C) -40
Max Ambient Humidity (in % r.H.) 95
99% of all inquiries get answered within 5 days. Your inquiry will be sent immediately to the right person within the vendor organisation.

By ticking the checkbox, you consent to the collection and storage of the data you have provided for the purpose of contacting and answering your request in accordance with our Privacy Policy. You can revoke your consent at any time by sending an email to bye-bye@hyfindr.com.

By ticking the checkbox, you consent to the collection and storage of the data you have provided for the purpose of contacting and answering your request in accordance with our Privacy Policy. You can revoke your consent at any time by sending an email to bye-bye@hyfindr.com.

Latest products

Browse the Hyfindr Digital Ecosystem

Forum icon
Tech Videos
Assignment icon
Tech Knowledge
Thumb up icon
Tech Advisory
Group icon
Tech Community