Category Archives: White Papers
Mobile devices in Hazardous Areas 14 June 2023
Mobile devices in Hazardous Areas. Written by Gary Friend PrEng CEng. gary@extech.co.za; +27 83 3098200/+44 7711402474Read more
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Wi-Fi in South African underground coal mines
From the standards: Radio Frequency Sources (9 kHz to 60 GHz) for continuous transmissions and pulsed transmissions,Read more
Do Passive RFID Tags need Hazardous Area Certification?
We’ve all been hearing about how passive RFID tags can help us streamline inventory andRead more
How to calculate an Intrinsically Safe loop approval; including the impact of using Ex ic (Zone 2) and gas group on cable lengths. March 2023
We all know what can happen when the correct techniques are not used when interfacingRead more
Intrinsic Safety: How does a Zener barrier work? Updated Jan 2021
For an explosion, all three of gas/dust, oxygen and source of ignition (spark or heat)Read more
Making Safe Waves (Wireless) in Hazardous Areas
As wireless devices such as mobile phones and laptop computers become more reliable and costRead more
Intrinsic Safety – Part 3 – Impact of Gas Group on loop approval and cable lengths.
Further to my previous articles: How to calculate an intrinsically safe loop approval (http://www.instrumentation.co.za/7571a) andRead more
Intrinsic Safety for zone 2 (Exic) and using longer cable runs.
Further to my previous article on calculating an Intrinsically Safe loop approval (http://www.instrumentation.co.za/7571a ), weRead more
Ex ic Intrinsic Safety’s New Protection Level
Synopsis The protection of electrical apparatus for use in flammable atmospheres is embracing a newRead more