Explosion Reserach Ltd.

Hazardous Location Specialists


We are a Hazardous Locations certification laboratory (Class I Division 1,2) providing expertise and Canadian/US Certification for hazardous area equipment, Intrinsically Safe Circuits (Exia), Explosion-Poof devices and critical safety circuits,(sometimes referred to as; C1D1, C1D2 certification )

We also conduct Failure Mode Effects Analysis (FMEA) and “Combustion Safety Control” Certification. We also certify LED lighting systems for Class I, Div 2 hazardous locations for the Canadian and US market place. “Explosive Fluid Seal” testing for gas tightness and secondary seals is also part of our repertoire. Having offices throughout Alberta makes it convenient for Canadian or USA certification.

If you are a manufacture or supplier of electrical / electronic equipment for the oil and gas industry- We are the ones to contact to get your product to market and certified to CSA (Canadian Standards Association) or UL standards. We used to be partners with Entela; now we have grown to be the most efficient certifiers for hazardous area in the oil and gas industry throughout North America. If you need to get your Hazloc ** product certified fast and efficiently- we are the ones that can help.

** The definition of “hazloc certification” : In electrical engineering, “hazardous locations certification” ( C1D1 _ C1D2 Or Zone system Certification ) is sometimes abbreviated to HazLoc, pronounced Haz•Lok or Haz•LoK


For an official quote regarding hazardous area or Hazloc certification” , Simply click on application and “Component form” (above)- SAVE TO YOUR DESKTOP; Fill in the blanks as best you can and return via email (explosion.research@gmail.com). We will email you within a couple of days a detailed quote and the applicable paperwork to start your certification, evaluation and/or testing- (If you do not receive it in a couple of working days please call us at 780-905-9601) Make sure to save the file on your desktop just in case it gets lost in cyberspace. Then call us for an appointment. If the device is relatively small, you can also send us a sample at the same time to facilitate the process.

WE ARE EXPERTS; for Hazardous Area Certification:

o intrinsically safe analysis/ --Ex ia ib ic-- intrinsically safe equipment certification (Ex ia) to CSA standards
o Critical safety analysis and failure mode effects analysis at the electronic component level
o Infallible circuit analysis
o zone 0 [Ex ia] Intrinsically safe certification
o zone 1 certification/ explosion proof certification
o Division 2 / non-incendive; Ex nA, Zone 2
o Certification from small instrumentation and components to large skid buildings.
o Burner safety components (electrical part of BMS) certification
o CSA standard C22.2 No. 199 and CSA C22.2 E60730 expertise (Burner ignition systems and components)
o RTU and battery certification
o LED lighting for hazardous location certification
o Explosive Fluid Seal testing
o If you require fast turnaround and upfront quoting you’ve come to the right place


Minimal travel costs for Calgary and Edmonton. (travel is calculated from Calgary or Edmonton whichever is closest)

Localized in Alberta – Owning our own aircraft makes it convenient-- Direct fly in to: Fort McMurray, Grande Cache, Grande Prairie, Dawson Creek, Peace River, ft St John, Medicine Hat, brooks, Drumheller, Stettler, Red Deer, Fox Creek, Beaver Lodge, Forestburg, Drayton Valley and Rocky Mountain House.

o Certification to CSA hazardous location standards more commonly used:
o CSA no. 213
o IEC 60079-11, IEC 60079-15 , IEC 60079-0, IEC 60079-18, IEC 60079-2, IEC 60079-7, IEC 60079-1
o CSA Standard C22.2 no. 30
o ANSI / ISA 12.27.01-2003
o NFPA 496 (purged and pressurized panels)
o CSA C22.2 No.137 hazardous area lighting
o Certification to CSA general purpose location standards commonly used in conjunction with the above Hazardous location Standards:

o CSA C22_2 NO 61010-1; CSA no 250; CSA no 14;

o And burner control (BMS) standard: CSA C22.2 No. 60730-2-5-14


Ask A Question or Make A Comment


Bill Stephenson CET
9410-95 St.
Edmonton, Ab Canada, T6C 3X3
Phone: 780 905-9601


Explosion Research Ltd.


Intrinsically safe certification for design engineers

What is intrinsically safe?

Intrinsic safety (I.S.) is a protection technique for electrical equipment installed in an explosive atmosphere (hazardous locations).

The I.S. protection technique is designed so that it limits the electrical or thermal energy available for ignition of the hazardous atmosphere, even under a fault condition.(or 2 faults- depending upon the level of safety required)


To show mathematical models of spark ignition curves. These curves are normally derived through rigorous testing using a cadmium wheel in conjunction with tungsten wires (also known as the spark ignition tester).

If one is to examine the graphs derived through this testing, (the graphs can be seen in CSA or IEC standards 60079-11) will see a rather nonlinear curve, or at least one that does not seem to have a correlating function in the mathematical world.

If we were to examine the values for the minimum ignition energy required in joules has stated in the book “combustion” by Irvin Glassman, appendix G. "minimum spark ignition energies and quenching distances"- table 1, we would easily see that there is direct useful data correlating ignition energy in joules to specific gases. taking this data and plugging it into the common formula for energy in a capacitance spark (as follows)

E=1/2 C(vg-vf)squared

Where E is the electrical energy obtained in joules, C is the capacitance of the condenser in farads, vg is a voltage on the condenser just before the spark occurs squared, vf is the voltage at the instance the spark ceases-squared. (if we assume that Vf is equal to 0, we will have the worst-case scenario in that the capacitor will have discharged all its energy in a theoretical time span of 0)

By plotting these values, directly against the "capacitance circuits ignition voltage in methane"-figure 1, we can see that the corresponding curves much more linear and already contains a large built-in safety factor. as would normally be expected.

What should be noted here is the fact that in the original CSA capacitance curves, we see that, as the voltage is decreased, the slope of the curve becomes increasingly high - this results in an inordinate amount of capacitance that may be allowed within the lower range. - This can be explained largely due to the fact of the test apparatus itself, As the cadmium wheel turns it is not allowing for full discharge of the capacitor, the faster the wheel turns, the less difference between v1 and v2 .The corollary being , that the higher the capacitance, the slower the requirement for the wheel to turn, or the greater the value that is required for v2-v1, since the tungsten wires contain some resistance, this would explain the limitations of the graph when large values of capacitance are analyzed.

Using a similar mathematical approach curves can be derived for the inductances and resistance. The curves can also be made to be gas specific, taking the values from table 1. in Glassman’s book

the formulas however are different, for inductance :

E=1/2 L(Ig- If)squared

(If there are any errors or omissions, or you would like to make a comment, please feel free to contact me at the home page)

Explosion Research Ltd.