Events : Arjay Engineering Spring Potluck

Last week was our highly anticipated spring pot luck! Everyone in the company enjoys being able to get together and eat delicious food from appetizers, to main dishes to delectable desserts. If you haven’t already seen them on our Facebook page, here are some delightful images to get you in the Spring spirit! Especially since the weather is going to be taking a nasty dive today!

This slideshow requires JavaScript.

As always, visit us at Arjay Engineering Ltd, talk to us on Twitter, and Like us on Facebook!

 

 

 

 

Arjay Engineering: What’s Happening in April

© Creative Commons: Chris Hunkeler 2012

© Creative Commons: Chris Hunkeler 2012

Is it just me, or is almost every one glad to see the back of March? It seems like spring is finally in the air, and things are starting to melt, warm up and grow. I, for one, cannot be more excited to see the end of winter, and pray for some more sunlight and warmer temperatures.

Here at Arjay Engineering, we’re ushering in this new spring season with an eagerly anticipated Spring Potluck. So far, only a few items have been posted to the sign up list, but I know I’m still contemplating what to bring. Decisions will have to be made since the date is sneaking up on everyone!

This past month of March had some interesting weather – lots of snow storms followed by warm days. I attended a GlobalSpec webinar about Social Media Marketing, and was pleasantly surprised that it was everything that I’m currently learning in school. Always a good thing to know and acknowledge.

Don’t forget that this month has a holiday! Arjay Engineering will be closed on Friday, April 18 for Good Friday. We will be open on the Monday after a nice relaxing long weekend.

Connect with us online! Follow us on Twitter, Like us on Facebook, and just say hi!

Product Spotlight – HydroSense 3400 Series

This week, we’re showcasing our HydroSense 3400 series. These include the 3410, and the 3420 models.

We created videos to help explain better what these products do, what they are best for, and how to maintain and look after them.

I hope you enjoyed these videos. If you are interested in seeing more, you can find them on our YouTube channel.

Product SpotLight: 2852-LPS Area Leak Alarm

2852-lps-sketch-1

Following our white paper about capacitance, today we bring you one of our products: The 2852-LPS Area Leak Alarm. This is used for reliable monitoring of liquid leaks in containments and floor spaces. Over 40 years of capacitance experience stands behind the 2852-LPS leak alarm. The sensors continuously monitor for the accumulation of liquid in a normally dry condition.

Some of the added benefits of this product are:

• capacitance technology alarms on any liquid
• no moving parts
• remote alarm unit mounts safely away from monitoring area
• available for hazardous rated locations

The 2852-LPS sensor monitors the capacitance field between the sensor pad and the floor. A single push button calibration at the controller locks in on the capacitance field of all sensing pads. Any liquid that intrudes into the pad space will increase the capacitive field and initiate an alarm.

The 2852-LPS sensor pads can be placed in key locations and tight spaces, using up to 3 sensor pads can connect to one control unit. It has an adjustable time delay and sensitivity to eliminate nuisance alarms. The 2852-LPS also has sensors available specifically designed to be Intrinsically Safe for Hazardous Locations. Arjay Engineering uses a high grade epoxy and PVC wetted parts which allow for the sensors to be in corrosive environments. Arjay Engineering’s capacitance technology responds to all types of liquids.

For more information:
2852-LPS webpage
2852-LPS Brochure
What Is Capacitance?

Interested in what’s here? Connect with us via TwitterFacebook, or leave us a comment here!
And of course, we can always be reached through our toll free number, 1-800-387-9487 to be directed to one of our knowledgeable sales staff.  

Arjay Engineering : What’s Happening February

Alright. March is here, and that means that it’s time to recap everything that happened in February.

I can’t believe that we’re already almost a quarter of the way through the year. Time just goes by way to quickly.

Greg spent more time in Saudi Arabia again this month, and was surprised that the weather was cooler than expected, but then I guess even the desert gets winter, it’s just not the polar vortex that we’re dealing with right now. This time around he spent more time travelling to individual places and our reps out there to do some training on our products. Arjay is available for training on our products at pretty much any time, we had a couple in-house training seminars as well.

Speaking of seminars, our sister company, Can-Am Instruments is hosting a FREE seminar on Texture. Sound interesting to you? Click through to the links and register [if you are in the Ontario area]. Should be a great day, as Eric Chiang from Brookfield Engineering will be presenting.

Price lists have been updated again! Some errors were found, and price lists that haven’t been updated yet finally got tweaked [and are still getting tweaked.. forever updating!]. Hopefully, I can count these as the FINAL copy now, but we shall see. There might be more updates as we go through the year. Actually, as I think about it, there probably will be, as Arjay customizes most of our products for our customer.

So far, March seems to fairly quiet – Although we have a big project in the works, and hopefully will be shipping this month! Of course, we’re already through the first week, and things can change quickly!

Happy March, everyone!

Interested in what’s here? Connect with us via TwitterFacebook, or leave us a comment here!

What Is Capacitance?

Capacitance is an electrical parameter which physically is most easy to define, electrically often misconstrued.

Physically, a capacitor is two electrical conductors separated by a non-conducting (or very high resistance) medium between the conductors. Consider the two plates of area (A) in Figure 1. The plates are metallic and they are separated by a distance (D).

Capacitance Fig. 1

If we fill the space between the plates with a conductor (water, acid, etc.) and close the switch (S), we get a current dictated by ohms law, I=v/r (where V is voltage, and R is the resistance between the plates). If the space is a non-conductor, no current will flow but the voltage will exist across the plates. The plus side and the negative side attract, and electrical charges will exist on the plates; thus an electrical field will exist in the space between. Clearly, the larger the plates, the more charges will exist and the closer the plates (D), the stronger the electrical attraction between the plates will be.

If we now reverse the polarity of the battery, the plus plate is now negative and the negative plate plus. For the electrical charge to reverse, ‘electrons’ must have  lowed, reversing their position. Since ¢electron flow¢ is current, we have current flow when we reverse the polarity.

If we now substitute the battery with an alternating current source, the polarity will reverse every 1/2 cycle and we will, hence, get continuous current flow. Therefore, while a capacitor will not allow DC current to flow through, AC current can pass. The amount of current will depend on the supply voltage, the capacity of the plates to hold charges and the distance (D), which determines the leakage (or electrical field) in the space and the material between the plates.

Capacitance Fig. 2

The formula for current flow through a capacitor with an alternating voltage applied is I=V2 FKA/D. K is defined as the dielectric of material or ability to store electrons.

Note: – the higher the area A, the larger the current
– the smaller the D, the larger the current
– K is determined by the material having a high value (eg. water = 80) and non-conducting materials having a lower value (eg. air = 1). Current is increased with
the supply frequency (f), as you are reversing the charges more frequently and current increases with supply voltage.

The plates, needless to say, do not have to be rectangular and can be any shape or size. One plate can be grounded and mostly is, in industrial circuits. While the properties of a capacitor have many useful purposes, capacitance can be an annoyance. Capacitance exists between power transmission lines and ground resulting in additional current, and hence, power loss in the lines. Great effort is invested by utilities to reduce this effect. In capacitance instruments, capacitance is put to a useful purpose. If we keep V and F constant from a regulated circuit, then we have a situation dependent on KA/D. Keeping any two constant, we can measure the third. Here
capacitance instruments can be used to measure area, or distance, or the dielectric constant.

In most applications, A and D are constant and we detect a change of K. In most circumstances, the probe is in a steel tank such as Figure 3. A is the surface area of the probe and D is the distance between the probe and the tank wall or other ground.

Capacitance Fig. 3

If the tank is filled with water (K = 80), it displaces air (K = 1), and we have a dramatic change in capacitance which is utilized in the electronics to activate a relay or transmit a signal proportional to the amount of water in the tank. The electronics allow for tuning of the system so that the operator can activate a relay at any point or measure between a wide choice of spans.

Modern day instruments detect small changes and many insulating products with K factors close to 1 (eg. many petroleum products have a K of approximately 1.5) can be measured.

Most circuits use the electrical ground as one plate, or side of the capacitor, and hence the ‘line’ side (the probe) is ‘looking’ across to ground. Any change in the medium which would change net K factor will disturb the instrument (eg. a person walking by). Therefore, if the probe is not looking to a fixed ground (eg. steel vessel) but rather, in a fiberglass ungrounded tank, then a suitable ground rod must be installed. Another typical application is in dry pump protection, where a ring probe designed to mate between two flanges at the inlet of a pump detects presence or absence of liquid. The probe and ground are inside the ring probe.

The total applications for capacitance is growing continuously and is limited only by the imagination of the industry. Many proximity (variable D) applications are in use, as well as interface applications of dissimilar liquids in all shapes and sizes of vessels and pipelines. Capacitance also has the ability to measure solids (eg. wheat, flour, coal) which widely extends its application.

Capacitance is used for safety such as warning people from entering a dangerous area (the person changes the K). The probe may be railing or machine body, or many other configurations.

For more information, please check out our website, or contact us.

Original Article written by Greg Reeves. Original “What Is Capacitance” Article.

Arjay Engineering: What’s Happening

Can you believe that it’s already February? Seems like we’re still trying to brush off the holiday festivities, and we’re already well into the new year.

Speaking of new years, Happy Chinese New Year! This past Friday, January 31, was Chinese New Year, and we’re ringing in the Year of the Horse. I hope that this year brings everyone luck in all parts of their lives.

A slight recap of what’s happened in the past month:

  • Greg’s been travelling again! This month he was back in Colombia, this time doing training seminars for our clients.
  • We’ve updated our price lists for the new year.
  • We had another renovation occur, this time our lunch room got the make-over.

We are also pleased to announce that one of the employees that we hired on part-time in December has now been hired on full-time! Congratulations, Kelly!

Here’s a look at some of the exciting things that are happening this month:

  • A delicious lunch-and-learn, where we’ll be learning the differences between RRSP’s and TFSA’s.
  • Our service departments will be getting a software makeover as well, as we’re incorporating a service package to make things run smoother
  • February 17 is Family Day! That means that our office will be closed, and normal hours resume on the 18th.
  • This is the month for customer training for our products, with 3 training sessions planned. One being in Saudi Arabia!

Interested in what’s here? Connect with us via Twitter, Facebook, or leave us a comment here!

Highlights of December 2013

In the past month, things have been rather quiet. We had a couple of holiday parties, and at the company pot luck we congratulated some milestones for our employees. At Arjay Engineering, and our sister company Can-Am Instruments, our milestones are at the 5, 10, 15, 20, 25 etc year marks.

Some of the food from our Potluck

Some of the food from our Potluck

This year, we had two employees make the 5 year mark, two employees at the 10 year mark, one employee at the 15 year mark, and two employees at the 25 year mark! Congratulations, everyone!

We take it as a huge compliment that our employees choose to stay with us for as long as they do. We’ve definitely undergone some huge changes this year, starting with a renovation of the upstairs offices and still continuing with our software upgrades happening in the next few weeks. We have also welcomed two new faces to our team, and are looking forward to celebrating their milestones!

As we ring in this New Year, we are setting goals for ourselves and the company, as well as hopefully being able to implement the changes that are on the horizon with little stress and confusion.

As always, connect with us on Twitter and Facebook for more recent updates.

Welcome to the New Year

Coming back after a nice, quiet, and relaxing break due to the Christmas holidays, I decided that it was time for Arjay Engineering to have a blog. In the past months, we have jumped on board with social media in the forms of Twitter, LinkedIn, and Facebook.

This blog will be the place where I post updates about products, our company and other interesting things in the industry.

Welcome to 2014!