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Tech Bulletin: Issue 5, December 2018

Why HazLoc Certification Can Be Important

Why HazLoc Certification Can Be Important

Flammable liquid and gas storage tanks and the storing of such liquids and gases are what most people think of when the term ‘hazardous location’ is used. However, the second deadliest explosion in the USA in the last decade (Reuters, Sept 2009) actually occurred at the Imperial Sugar plant near Savannah, GA. The Chemical Safety Board issued a report that cited the cause of the explosion as the build-up of sugar dust inside a closed conveyor belt.

An industrial area is classified as hazardous when it contains three components, according to Precision Digital; a flammable substance, an oxidizer and a source of ignition. Hazardous areas require the use of equipment specifically certified for use in such areas.

Certain Madison product models have been tested and approved by CSA International for use in hazardous locations. The liquid level switch product is normally approved as a Class 2258 02 Process Control Equipment for hazardous locations classified as Class A, B, C and D; Class II, Groups E, F and G; Class III. For more information on CSA, visit their Web site at www.csagroup.org.

Navigating testing and certification requirements can be challenging and time-consuming. If your project requires a specific certification, Madison can work through the requirements needed to obtain the necessary approvals.


Multi-Point Float Switches or Continuous Level Float Sensors – Which to Choose?

Multi-Point Float Switches or Continuous Level Float Sensors – Which to Choose?Multi-point float switches and continuous float level sensors are designed to gather important information about the fluid within a vessel. Is one better than the other? As usual, it depends on what you need to know and how you want to make use of the information.

Madison designs multi-level float switches that measure up to 6 levels within a vessel. This allows the operator to know the low point, high point and mid points of the liquid to be measured. Operation points can be set up or down to control pumps as needed, and with two or more points, can also be used to eliminate ‘chatter’ (the rapid on/off of the switch) which prevents premature failure of the device being controlled.

Continuous level float switches provide precise process control for critical applications. How critical? Picture the hydraulic fluid level in a gearbox. The fluid keeps the braking system in a locomotive or heavy equipment vehicle lubricated so that it does not burn out. A continuous float level sensor will constantly monitor the fluid level, keeping the fluid from reaching critically low levels. This prevents catastrophic failure, expensive downtime and costly repairs.

It seems that more decision makers are choosing continuous level float sensors over the multi-point switches in applications when they can make use of the constant flow of information generated. This is not surprising, given that we live in a world where a continuous flow of information is often a requirement for decision-making.

Want to know more about continuous level float sensors? Give Madison a call at 203-488-4477 or contact us at info@madisonco.com.


Happy Holidays from Madison Company and Reliance Detection Technologies!

Our facility will be shut down for the holidays from Monday, December 24th through Tuesday, January 1st. We will re-open for business on Wednesday, January 2nd.

Have a safe and happy holiday season. We look forward to serving you in 2019!

Happy Holidays from Madison Company