July 30, 2018

Performance Related Concern of FM Approved Product with Detcon Inc. Solid State H2S Sensors (Model TP-524D)

  • Type of Notification: Performance Related Concern
  • FM Approval Status: FM Approved

FM Approvals has been notified by Detcon Inc. of a potential performance related concern involving FM Approved Detcon model TP-524D solid state H2S sensors manufactured between April 1, 2017 and March 8, 2018.


Company Identity: Detcon Inc.


Name: Detcon Inc.

Address:  4055 Technology Forest Blvd, The Woodlands, Texas 77381, USA.


Contact Information:  Michael Mobley | Certification Manager Personal Safety Division 4055 Technology Forest Blvd., The Woodlands, Texas, 77381, USA

Office: +1 713 559 9258



Product Identity: TP-524D Solid State H2S Sensor

Description: The Detcon model TP-524D H2S Solid State Sensor was approved as a Stationary Single Channel 4-20 mA Toxic Gas Detector suitable for installation as explosionproof in Class I, Division 1, Groups B, C, and D Hazardous (Classified) Locations by FM Approvals on May 16th 2011.


Make/Model: Detcon TP-524D


Nameplate Data: Model TP-524D bearing the FM Approval Mark with the following ratings:




T6; -40°c ≤TA ≤60°C


FM Approval Status:  FM Approved


Hazard Involved: Detcon has informed FM Approvals that on certain batches of product manufactured in the timeframe referenced may have had a step in the manufacturing process omitted that makes the product vulnerable to failure under vibration conditions.


Detcon Inc. is reaching out to all affected users and is conducting an exchange program for product that falls within the identified date range (see attached Product Notice).

Using This Product?

If you have any questions or concerns related to this Product Alert please contact:

Antonio Pires

Norwood, MA, United States

+1 (1) 781-255-4825