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For immediate help with your hazardous environment or explosion proof UV contact  romeo@glascouv.com

​The phrase “Intrinsically Safe” is often used generically to describe products destined for hazardous (explosive) areas. This paper explores the term “Intrinsically Safe”, provides an overview of what is required to certify a product and compares Intrinsic Safety against Explosion Protection concepts.

Intrinsic Safety – the basics The term “Intrinsically Safe” (I.S.) is frequently used to describe any product destined for an explosive area. In reality, I.S. is a protection concept based around limiting the available electrical energy to nonincendive levels so that sparks cannot occur from short circuit or failures which could cause an explosive atmosphere to ignite. A typical fixed I.S. circuit would comprise a device such as a temperature sensor permanently located within the explosive area, which is in turn protected by a safety barrier located in the safe area. These barriers usually incorporate a series of diodes, resistors and fuses arranged and sized in such a manner that they limit the energy provided to the device in the field. Interestingly, the inclusion of a barrier in the control loop does not allow any device to be connected downstream. Even though the power may be limited, the device located within the explosive area itself must also be designed to comply with the requirements of various regulatory standards depending upon the geographical locale of the plant.

Certification standards Across the world, there are differing regulations and requirements which dictate how products are designed, developed, certified and manufactured in order to be sold to a customer as I.S. certified. Some examples of I.S. standards are:

 Europe:- EN60079-1:2007

 United States:- Factory Mutual - FM3610

 Canada:- CSA C22.2 NO 157.92-CAN/CSA

Although each of these standards defines the requirements for a device to be certified as I.S., the requirements of each are different. These differences range from the effects of static build-up on non-metallic casings to the assessment of cells, even the test parameters themselves may be different. The bottom line is that it is not possible to claim a product certified as intrinsically safe in Europe to EN60079-XX (ATEX) can be deemed as intrinsically safe certified in the United States or Canada and vice versa. For each country, the device should be tested in accordance with the local requirements. Once tested and certified, products are marked as part of their manufacture.

Transcat.com (source of information).

  • Vessels can be code stamped
  • Gas purged enclosure
  • Remote explosion proof enclosures



  • IL-EXP-300-2
  • IL-EXP-300-4
  • IL-EXP-300-6
  • IL-EXP-500-2
  • IL-EXP-500-4
  • IL-EXP-5000-4
  • IL-EXP-5000-6
  • IL-EXP-6000-6
  • Wide range of hazardous area classifications
  • Gas purged or traditional EXP enclosures
  • Designed for UV Oil and UV Gas installations
  • Designed for drinking and wastewater
  • Small footprint
  • High output or Amalgam lamps
  • UV monitoring system
A hazardous location is defined as a place where concentrations of flammable gases, vapors, or dusts occur. Electrical equipment that is installed in these locations is designed and tested to ensure it does not initiate an explosion, due to arcing contacts or high surface temperature of equipment.

Utilizing traditional explosion proof enclosures and parts as well gas purge technology (gas purge systems are designed to shut down in the event of gas pressure loss) Glasco designs systems to meet varied engineering protocols.

The concern in hazardous installations is that even voltages insufficient to break down air can be associated with enough energy to ignite atmospheres containing flammable gases or vapors, or suspended dust. For example, hydrogen gas, natural gas, or petrol/ gasoline vapor mixed with air can be ignited by sparks produced by electrical apparatus.

Examples of industrial facilities with hazardous areas are petrochemical refineries, chemical plants, grain elevators, and coal mines.

Note:  Explosion Proof is a word that is used for hazardous locations.   Glasco UV is reminding that this is not necessary ATEX. Each engineered system will be designed based on our past experiences.  Since each installation is different (Countries, Zones, Engineers, Corporate Policy) it is important that all requirements are addressed during the proposal stage.   Many projects have their own design standards that do not match our normal equipment.   Glasco UV has the ability to address these issues ahead of time.   This includes special adapters, connections, buttons, displays and a host of other items that are typically found on these projects.


The “IL-EXP” systems are manufactured in the USA and are designed to treat flows ranging from .25 to 1,000’s of gallons per minute.  UV systems designed for oil and gas rig UV disinfection applications.  Used in hazardous environments requiring UV.

The IL-EXP Series is designed and customized to meet a variety of hazardous area classifications (Class I, Division 1 Class I, Division 2 Class II, Division 1 Class II, Division 2 Class III, Division 1 and Class III, Division 2).