Occupational Safety and Health Administration (OSHA) Publication 3073 defines a hazardous location (HazLoc) as such:

Hazardous locations are areas where flammable liquids, gases or vapors or combustible dusts exist in sufficient quantities to produce an explosion or fire. In hazardous locations, specially designed equipment and special installation techniques must be used to protect against the explosive and flammable potential of these substances.

Due to the safety concerns HazLoc areas pose, the National Electrical Code (NEC) and Canadian Electrical Code (CEC) have developed standards to address these concerns and outlined the testing procedures the equipment, use in these areas, need to undergo to negate the safety risks.

Although, these standards are accurate and provide the level of safety HazLoc areas demand, trying to navigate the subject matter alone can prove to be a daunting task.

Here within, we highlight the critical parts to the standard to present content and provide an introduction into the subject. In addition, we want to showcase and demonstrate you do not have to feel you are alone when making decisions in electronic equipment in this very complicated application. Feel free to leverage our expertise, together we go far!


The standards categorizes HazLoc areas into 3 classes: Class I, II, III and 2 divisions: Division I, II. The class identifies the properties of the substance and the division identifies the presence of a substance under operation conditions. The final caveat in the standard is Class I and II are further divided into 7 Groups: A, B, C, D, E, F, G, which identifies the specific material properties so further ‘protection concepts’ can be tested particular to the material property.

With the advancement in edge-computing and sensing devices, unlocking system optimization, only high-processing power and software can do, one major certification electronic equipment used in HazLoc areas have to obtain is Class 1 Division 2.

Class 1 – Flammable gases, flammable liquid produced vapors, and combustible liquid produced vapors. EX: Natural Gas, Propane, Hydrogen, Methanol, etc.

Division 2 – Ignitable concentrations of flammable gases, flammable liquid-produced vapors, or combustible liquid-produces vapors are not likely to exist under normal operating conditions.

From human machine interface (HMI), embedded automation computers, 1/0 modules, network gateways, Ethernet switches and more, Advantech offers the C1D2-certified solutions  that can assist your organization meet its needs  in these  hazardous location environments.


Advantech leverages more than 30 years of experience in the industrial automation industry and our strategic technology partner network  when designing different products  and solutions that will reliably provide rugged, safe use in hazardous locations.




Due to the nature of oil fields,  typically spanning  large geographical areas, in order to provide increased safety, system reliability, and lower overhead, stakeholders of these assets have begun to deploy IIoT systems to assist in the day-to-day operations.  This  means establishing a “smarter” field, to enable this technology,  often becomes a highly complicated logistical project for the organization to deploy. exercise.

Leveraging Advantech and its domain experts, as a strategic partner as opposed to simply a technology vendor, the complication in the project was streamlined.  The stakeholder was able to meet its goal of monitoring  status of the well drills  and sending, automatically, alerte to field technicians when  the torque, voltage, current or amp values exceed safe limits.

This was achieved by connecting  the field asset sensors to an ADAM-4117 data-acquisition device that was then connected to an UNO-1372GH, edge-computing platform which processed the data feed,  and finally this data was sent to a ruggedized monitor,  FPM-8151H, where it was able to be display locally for the technician’s use.  The entire system is connected through the networking layer using  a GPRS modem using Advantech’s WebAccess interface which allows  the central control room  monitor more than 800 well heads; across multiple oil fields simultaneously.



Advantech  provided value for one of its partners by enabling remote monitoring  of their fueling operation.  The information and machine diagnostic data  was collected at the individual system asset and transmitted  back to the client’s offices and corporate headquarter. The  monitoring system not only measured fuel volume, the client leveraged Advantech to assist in providing other sensor data that was crucial to the operations of the system.

There were more than 400 liquefied natural gas storage facilities connected in the system. Most oil, fuel, or chemical tank storage units are in hazardous location area which requires constant monitoring of pressure, liquid levels, control valve position, and temperature. A SCADA-based system for real-time data collection and transmission is essential for plant and personnel safety.



A major oil company was looking for a non-invasive way to monitor equipment in its terminals, such as large tanks, pumps and other outdoor equipment. The company needed to monitor tank conditions, pump status and additional equipment all with little disruption to existing process controls to maintain safety and avoid process downtime.

To meet the challenges of the application, the company decided to utilize the Wzzard Wireless Mesh product family from Advantech. The wireless mesh solution provided a stable, wireless platform to connect sensors to an Advantech C1D2/ATEX certified SmartFlex Gateway. All Wzzard Industrial Nodes are rated C1D 2 for hazardous locations, rated IP67 for outdoor use and UL listed. Advantech supplied damp-on current sensors, thermocouples and vibration sensors for monitoring condition of pumps, motors and gearboxes. Additional sensors, such as pressure, flow and tank level, were provided by third-party vendors and easily connected to the Wzzard nodes.