In-Facility Monitoring  

Sensible EDP Solutions



What is an LDSN ?

A Leak Detection Sensor Network (LDSN) is an alternative means of providing Leak Detection and Repair (LDAR) compliance. When placed in a process unit or facility, a Leak Detection Sensor Network utilizes real-time sensors to monitor for in-facility leaks 24 hours per day, 7 days per week.

Montrose Environmental Group's Sensible EDP and its cutting-edge Leak Detection Sensor Network (LDSN) redefine the standard for leak detection and repair. Our LDSN utilizes C1D2 sensors to vigilantly monitor in-facility leaks in real time. On detection, it rapidly alerts LDAR technicians, paving the way for swift and efficient repair. A Leak Detection Sensor Network represents a breakthrough from traditional LDAR methodologies, ushering in an era of enhanced efficiency, speed, and reliability in managing fugitive emissions. If a leak is detected by the LDSN, an alert is sent, which prompts an LDAR technician to identify the leaking component for repair. The LDSN provided through Montrose offers the following features: 

  • • Reduced emissions through faster identification of leaks.
  • • Enhanced process safety with 24/7 monitoring of low- and high-level leaks.
  • • Reduced manpower on site.
  • • Potential cost reductions.
  • Real-time data collection, centralized monitoring, and alerts for proactive response to potential emission issues.

The Detection Response Framework

An important extension of the Leak Detection Sensor Network (LDSN) is the Detection Response Framework (DRF). The Detection Response Framework represents the procedures used to respond to information delivered by the LDSN and to provide important information to the LDSN to ensure ongoing performance.

The LDSN system automatically detects and approximates the location of the emission source in the monitored process unit based on the VOC concentration, wind speed and wind direction. The LDSN then notifies the LDAR team of the detected emissions, who will then take appropriate action under the DRF.

LDSN Response

A high-level detected emission that may represent a potential safety concern is communicated immediately through an alert and/or alarm. These alerts require immediate attention and can serve as an augmentation of existing facility safety systems. Other, more routine emissions are detected and communicated over time (hours to days), with repeating detected concentration peaks under varying wind directions building confidence in the assignment of an emission event.

Once a notification threshold is reached, a Potential Source Location (PSL) window is assigned. The LDAR personnel respond, per the DRF, to investigate the PSL and identify the source of the emission. The identified source is then measured with calibrated Method 21 equipment (or Optical Gas Imaging) to document the leak’s peak concentration value and initiate repair procedures. All information regarding the leak is efficiently entered into a mobile device and recorded for regulatory, operational, and quality assurance purposes. Other information, such as maintenance activities, are entered into the system to facilitate the operation of the LDSN. 

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