SM Magnetic Switches

EDI Model SM Magnetic Switch System consists of a sealed reed switch for use in above and below ground test stations. The switch is activated by holding a magnet next to the colored band. Green bands denote normally closed switches which are momentarily opened with the magnet. These are most often used for instant-disconnect cathodic protection coupon measurements. Red bands denote normally open switches which are momentarily closed with the magnet. These can be used to electrically isolate a reference electrode in test stations which may become submerged. Magnetic switches are available in Board Mount, Model SM-BRD, or Adjustable Mount, Model SM-ADJ, configurations. Board Mount switches are on a small circuit board with two 9/32 in. (7 mm) dia. holes on 1 in. (25.4 mm) spacing. These switches will fit over adjacent terminals of most test stations. Adjustable mount switches are centered on a length of wire terminating in 9/32 in. (7 mm) ID ring lugs. Ring lugs are spaced at 6-1/4 in. (160 mm). This design is used when the switch must span non-adjacent terminals in a test station.
An activating magnet with a lanyard, Model SM-MAG, is recommended for use with the switches.
Electrical Specifications
Switching Current: 0.5 amps
Carry current: 1.0 amp
Switching Voltage: 175 volts
Breakdown voltage: min. 200 VDC
Contact resistance: 150 µohm
Operating temp.: -40F – 260F (-40C – 130C)

Portable Reference

EDI’s permanent portable reference electrode, Model IT, is used to make potential readings in any application where a standard, liquid-junction portable reference electrode is presently being used. The Model IT contains a gel rather than a liquid so it can be used in all positions. The gel provides long maintenance-free service since it does not require refilling or cleaning. Soil contact is through a hardwood plug which offers several advantages over ceramic membranes: it will not clog as readily, it is resistant to salt blockage, and it can be reworked by light sanding or cutting if it becomes contaminated with oil. The Model IT has a twenty year design life and an indefinite shelf life if the end cap is in place. Gelled copper/copper sulfate (CUG) electrodes have a blue housing while gelled silver/silver chloride (AGG) electrodes have a light grey housing. Both models have a 1/4 – 20 threaded stud termination

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Portable Reference

EDI’s permanent portable reference electrode, Model IT, is used to make potential readings in any application where a standard, liquid-junction portable reference electrode is presently being used. The Model IT contains a gel rather than a liquid so it can be used in all positions. The gel provides long maintenance-free service since it does not require refilling or cleaning. Soil contact is through a hardwood plug which offers several advantages over ceramic membranes: it will not clog as readily, it is resistant to salt blockage, and it can be reworked by light sanding or cutting if it becomes contaminated with oil. The Model IT has a twenty year design life and an indefinite shelf life if the end cap is in place. Gelled copper/copper sulfate (CUG) electrodes have a blue housing while gelled silver/silver chloride (AGG) electrodes have a light grey housing. Both models have a 1/4 – 20 threaded stud termination Read more >

Plan Your Content

If you’re considering adding a blog to your site, you’ll want to have a plan beforehand. Planning your blog will help your subject matter remain consistent over time. It’ll also help you determine whether or not there’s enough material to maintain a steady stream of posts.

One pitfall many new bloggers run into is starting a blog that isn’t posted to frequently enough. A shortage of recent posts can give your visitors a bad impression of your business. One may think “I wonder if they’re still in business” or “they may want to hire a writer.”

A blog, like any other customer facing aspect of your business, communicates your brand. If it isn’t maintained and given proper attention, people will notice. Post regularly and keep your content fresh. Give your audience a reason to visit often.

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