Skip to main content
Welcome to the cutting edge of safety science—Learn more about our rebrand.
Switch Language
  • Public Notice

UL Warns of Counterfeit UL Mark on Infrared Industries Model IR8400D Gas Analyzer (18PN-18)

August 15, 2018

NORTHBROOK, Ill., August 15, 2018 – The following is a notification from UL that the Model IR8400D Gas Analyzer identified below bears a counterfeit UL Certification Mark for the U.S. and Canada. The Model IR8400D Gas Analyzer has not been evaluated by UL to the appropriate Standards for Safety and it is unknown if this gas analyzer complies with any safety requirements.

Name of Product:
Infrared Industries Inc. Model IR8400D Gas Analyzer

The product nameplate is marked with a counterfeit UL Listing Mark and the following:

PH: 800-344-0321
SN: ­____     D.O.M. ____
MADE IN USA  Counterfeit UL mark
CH4 __ / C3H8 __
INPUT: 100-240 VAC
4A 50/60 HZ

The blanks after SN:, D.O.M., CH4, and C3H8 may contain various letters, numbers, and/or characters.

The face of the product is marked:



Counterfeit UL mark

Counterfeit UL mark

Known to be sold by:

Infrared Industries Inc. of Hayward, CA.


Gas Analyzers

About UL

UL fosters safe living and working conditions for people everywhere through the application of science to solve the safety, security and sustainability challenges. The UL Mark engenders trust enabling the safe adoption of innovative new products and technologies. Everyone at UL shares a passion to make the world a safer place. We test, inspect, audit, certify, validate, verify, advise and train and we support these efforts with software solutions for safety and sustainability. To learn more about us, visit