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Using Inductive Proximity Sensors Even At Range

When you hear the term ‘proximity sensors’, you know one thing right away: whatever you’re sensing, it had better be proximate — as in, close. You Google ‘proximity sensors,’ and you’ll see vast scope of sensing ranges from two millimeters all the way up to…forty millimeters. It’s easy to assume, then, that the thing you’re sensing had better be no more than a few inches away from your proximity sensor. And you’re right…ish.

What might not be incredibly obvious at first brush is just how easy it is to bring the distant object to the sensor, in a manner of speaking. Or, more accurately, you can bring a proxy of the distant object to the sensor — turning it into a proximity proxy sensor.

Side note: before we continue, let’s note precisely what we’re talking about below: an inductive proximity sensor is a metal coil with electricity oscillating within the coil, causing an electromagnetic field. If a ferrometallic object moves through the field, it causes an electromagnetic feedback which forces the oscillation of the electricity to slow down, which triggers the sensor.

For example, let’s say you have a conveyor belt, and you want to know whenever a box passes through a certain location on the belt — but there’s no convenient place to put a proximity sensor near the belt itself. If, instead, you put a simple wheel on the edge of the belt where it will be turned by a box as it passes by — and then attach that wheel to a belt that turns another wheel several feet away — you can sense the rotation of that second wheel with a proximity sensor. Say, you put a metal rivet on the second (non-ferrous) wheel, and you have a inductive proximity sensor that pings every time the ferrous rivet on the second wheel passes by. Then each box will rotate the wheel which will cause one ping from the proximity sensor.

With the aid of a few simple machines, the inductive proximity sensor with a range measured in millimeters can be used several feet away from the actual item being detected. This kind of system is in use in industrial applications all around the world; the ‘proximity’ of the proximity sensor is much less limiting than one might first expect.

Vacuum Pump – Uses and Care

The vacuum pump and hydraulic pump are some of the many inventions that have a huge impact on the lives of human beings. The vacuum pump, in particular,  is a product of some of the most brilliant minds in the world. Vacuum pumps have a number of important uses, which are not only limited to the household setting, but they are valuable for industrial applications as well.


Uses of Vacuum Pumps

Vacuum pumps can provide you with a multitude of services. They are essential in the processing of composite plastic molding and used in checking the flight instruments in simpler and older aircrafts. They are also utilized in the production of vacuum tubes, electric lamps and CRTs when they are refilled or evacuated with a specific gas. Vacuum pumps are also useful for vacuum coating on metals, plastics and glass for decoration. They are also used in Radio-surgery, Radio-pharmacy, Radiotherapy and other critical medical treatments. These are only some among the many uses of vacuum pumps.


Care and Maintenance

Vacuum pumps are very efficient tools, but they can also malfunction and fail to perform its functions because of exhaustion of minor particle damage. This is something that you wouldn’t want to happen. Vacuum pumps are useful to you only when it’s in a good condition. Its condition can easily be maintained by simple greasing and conditioning a few times a year.



In the unfortunate times when your vacuum pump fails, be sure that you know what to do or where to go. Most of the reputable companies selling vacuum appliances offer maintenance and repair services when you purchase one. If you have done so, then you merely have to set-up an appointment with their repair center. Another option is to go to a trustworthy repair company and have them handle the job. The most important thing to keep in mind when your tool needs to be repaired is that it has to be done by a professional. Inexperienced companies or individuals will only do more harm than good. You man need to shell out a few more bucks for the professional service, but this is a better choice than messing up with your tool.