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Why use a Magnetic Liquid Level Gauge over a glass sight gauge ?

There are many reasons to choose a PROMAG Magnetic Liquid Level Gauge instead of a glass site gauge. Glass gauges are susceptible to leakage and breakage, and can be dangerous. They get dirty easily, and are costly to repair and clean.

Download Article on "High Cost of Glass Gauge Repair" 
Click  here for article in Acrobat . PDF format.


What size Float Chamber do you use ?

We normally use a 2.5" chamber, but also use 2" and 3" chambers for some applications.


What is a PM-26 level gauge float made of ?

In most cases, the float is made of the same material as the PM-26 Gauge Chamber. Depending on the application, floats may be made of other materials or coated for slip resistance or for corrosion resistance.


How much room is there between the float and the inside wall of the float chamber ?

There is normally about .25", but when the need arises chambers and floats can be constructed to allow more room if needed for the particular application.


How far away from a PM-26 Gauge chamber should carbon steel objects be removed.

To avoid problems caused by interference between the magnetic field of the float and objects external to the PM-26 chamber, any carbon steel or any magnetic material should be kept away from the PM-26 float chamber by at least 2 1/2"


What size of opening do I need to insert an I  (internal) style MST or CLT transmitter into the top of my tank? What about internal top mounted switches,  such as the LS-85, or LS-86 ?

We normally like to have at least a 3" opening, but this all depends on the triangle of Pressure, Temperature, and Specific Gravity of the Application. Depending on the application, many installations of   LS-85 or LS-86 Switches can be accomplished through 2" flanged nozzles!


Why do you use insulation pads, or blankets on PM-26 Liquid Level Gauges ?

We use insulation pads or blankets for one or more of the following reasons.

  • For Personnel Protection
  • To keep the operating temperature of externally mounted  level switches and transmitters below 225 degrees F .
  • To prevent heat loss
  • To protect the gauge contents from freezing

There is an orange label  on my new PM-26 Liquid Level Gauge that states the the "Float Stop must be Removed before Use".    Does this mean that I have to remove the flange at the bottom end of the Level Gauge?

No the bottom flange need not be removed. The cardboard float stop can be removed from the side bottom process connection. This stop is installed to trap the float at the lower end of the gauge to prevent damage during shipping. Generally the stop is held into the side connection with shipping tape, or a protective flange cover.


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