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UPDATED 8.26.19: Every day, we’re offering more free shipping from more suppliers.

2017 October 11

Hey, did you know?
We update this blog post frequently with new suppliers and other updates. Check back here for the very latest and greatest in free shipping news from alpscontrols.com!


If you’ve been paying close attention, you may have noticed recently that we’ve been offering free shipping when you order from a number of our terrific suppliers.

Well, here’s a special news flash: we’re only just getting started.

Every day we’re meeting with our suppliers and working out new deals to bring our customers free shipping. And while it’s not a quick or simple process — because honestly, free shipping simply isn’t a good fit for every product from every manufacturer — we truly are dedicated to bringing more value and convenience to purchasing in our online marketplace at alpscontrols.com.

So stay tuned, because you’ll see more no-hassle, free-shipping offers on alpscontrols.com in the days and weeks to come. Right now today, we invite you to enjoy these productivity-boosting, massive-selection-choosing, bottom-line-improving offers from:

That’s free ground freight shipping, anywhere in the contiguous United States. Some restrictions apply, so if you have questions just contact anyone on our support team.

Check back here often — because we’ll be adding to this list soon!

Setra Systems helps you create and monitor negative pressure spaces

2020 July 15

In the post COVID-19 world, new applications for negative pressure spaces have begun to emerge and negative pressure ventilation is mentioned throughout OSHA and CDC guidelines. No longer strictly meant for airborne infection isolation rooms in hospitals, negatively pressurizing a space can help businesses and other facilities safely resume operations. These new applications include dental, mortuary, long-term care facilities, and nursing homes. In long-term care facilities, creating an isolation wing using negative pressure can be an effective and efficient way to further reduce the spread of dangerous particles and increase the effectiveness of the isolation. A designated isolation area for suspected or confirmed COVID-19 patients helps limit the possibility of contamination and spread throughout a nursing home or long-term care facility. In spaces like dental offices, that commonly deal with aerosol generating procedures, it is crucial to negatively pressurize certain rooms to prevent the spread of airborne infection.

Some key parameters to monitor when increasing ventilation or creating a negative pressure space include air changes per hour (ACH) and differential pressure. The CDC recommends 12 ACH in a space where a procedure creating airborne viral particles is performed. Another requirement for these rooms includes negative air pressure relative to the outside reference area, a difference of at least -0.01” WC.

Establishing a Negative Pressure Room

There are several methods to quickly create a negative space. First, minimize the number of people entering and exiting the space. Second, create a barrier. If the area has a door, block any gaps to help create a seal. If it’s an open area, block off the space with a heavy plastic curtain. Third, bring in a portable unit to pull a negative pressure and exhaust the contaminated air out. Ideally, the air is exhausted away from any area where people pass by outside. Incorporating a portable high-efficiency particulate air (HEPA) filter with the portable unit will help reduce particle counts in the air without relying solely on the building’s HVAC system. In addition to HEPA filters, consider using ultraviolet germicidal irradiation (UVGI) for sterilization of the air being pulled by the portable unit.

An existing HVAC system can also be used to create a negative pressure space, although this method is more involved and requires more investment. Work with a local mechanical contractor or HVAC system engineer to adjust an HVAC system to ensures clean air is drawn into the room and contaminated particles, such as those from aerosol generating procedures or patients in isolation, are not able to escape. Traditional airborne infection isolation rooms in hospitals do not recirculate exhaust into the facility’s main HVAC system. Rather dedicated duct work filters the air through a HEPA filter before it is vented by stack on the roof so atmospheric air can dilute it. When adjusting an HCVAC system, be sure the contaminated exhaust has a path to leave or be sterilized and isn’t recirculated into clean spaces.

Monitoring Negative Pressure

setra lite

With a newly pressurized space, it is crucial to have sufficient monitoring to ensure safe environmental conditions. Setra LITE is a visual pressure indicator that glows green when the space is safe. It can be mounted inside or outside the room, depending on the building’s layout and the user’s preference. Quick mount kits are available for even faster installation.

Find the Setra LITE on alpscontrols.com right here

setra mrms multiroom monitor

Setra’s MRMS, or Multi-Room Monitoring Station, can monitor the status of multiple pressurized spaces at a centralized location, like a nurse’s station. The MRMS can display conditions for up to eight rooms with configurable audible/visual alarms.

Find the Setra MRMS on alpscontrols.com right here

setra flex environmental room monitor

Setra FLEX has advanced monitoring and control capabilities for deeper insight into the conditions in a pressurized space. On FLEX, up to 3 rooms can be monitored from a single unit. FLEX can monitor and display pressure, temperature, humidity, and air changes per hour as well as send control signals to HVAC or building automation systems for real-time adjustments based on the room’s conditions.

Find the Setra FLEX on alpscontrols.com right here

As places like dental offices re-open and long-term care facilities evaluate their infection control strategies, there are many factors to consider. Understanding the various ways these new applications can create and monitor negative pressure spaces is an important aspect of safe and effective future operations.

To help slow down the spread of coronavirus, alpscontrols.com will be working remotely as of Friday 3.13.20.

2020 March 12
by admin; 1,439 views

For you, it’s business as usual; you probably won’t even know that we’re working from home!

We don’t have to tell you that there’s a ton of news out there about the spread of the coronavirus, most of it ranging from the casual to the hysterical. It’s hard to weed through all the facts, charts, experts and sooth-sayers to figure out the best course of action in these — to say the least — turbulent times.

But we decided that there was something we could do. By working remotely from home and increasing social distancing for our employees (and the customers and suppliers with whom we come into contact), we can proactively help flatten the curve of new coronavirus cases, and hopefully alleviate the pressure to come on our healthcare system.

The terrific thing about being a high-tech, live-on-the-innovative-edge kind of company like we are, though, is that pretty much all of us are able to work from home with virtually no interruption in how we take your orders and keep your projects moving forward! We’re committed to carrying on business as usual-as-possible, so we want you to understand that:

  • alpscontrols.com never, ever, ever closes. You can login like normal, order your parts, make your lists, get your job done.
  • Our customer service team is standing by and ready to help you just like always. You can:
    • email them at csr@alpscontrols.com
    • call them at 412.464.1730
    • reach them via instant messaging from that gorgeous orange circle in the bottom right corner of our site
    • find their direct email addresses or Skype links at our Contact Us page here

We can totally do this. It might be a little bumpy at first — we have to forward calls, shuffle some technology around, that kind of thing — but really, you should notice very little difference. We’re proud to be your favorite online marketplace for all of your HVAC and building automation parts, and our unique business model provides us with the means to serve you no matter where we are.

We hope that you, your companies, your friends and families are all safe and healthy. Hopefully by taking even small measures like working from home, we can make a positive difference in this crisis — and that everyone who is able, will do their part as well.

Please: contact us if you have any questions. Just don’t judge us if we video-chat with you while we’re still in our bathrobe.

We’re making changes to where we collect state sales tax on your orders.

2019 December 30
by admin; 1,128 views

The beginning of 2020 brings for many of us a sense of renewed hope, excitement, perhaps even joy at the prospects that a new year brings.

Aaaand, in the case of alpscontrols.com, it also brings changes to how we’ll be collecting state sales tax on the orders you place online.

Hope, excitement, and perhaps even joy, right? You get joy out of paying sales tax, don’t you? Anyone?

Fair enough. Moving on:

For a number of you, nothing will really change. We currently collect state sales tax from a handful of these United States. For a number of you, however, you will see a change in your orders. Here’s a handy, quick-reference map:

(click to see this embiggened)

Or, for those among you who love lists, here you go:

States for which we currently collect sales tax:

  • Arizona
  • Colorado
  • Florida
  • Illinois
  • Kentucky
  • Maryland
  • Michigan
  • Minnesota
  • Pennsylvania
  • Tennessee
  • Vermont
  • Wisconsin

States for which we will begin collecting sales tax in 2020:

  • Alabama
  • Arkansas
  • California
  • Connecticut
  • Georgia
  • Hawaii
  • Idaho
  • Indiana
  • Iowa
  • Kansas
  • Louisiana
  • Maine
  • Massachusetts
  • Missouri
  • Nebraska
  • Nevada
  • New Jersey
  • New York
  • North Carolina
  • Ohio
  • Oklahoma
  • South Dakota
  • Texas
  • Utah
  • Virginia
  • Washington
  • West Virginia

But wait: there is hope! If your business or your projects are tax-exempt, you can easily upload your tax exemption certificate to your online account, and state tax charges will be adjusted accordingly on your orders. In fact, because it’s nearly the new year, it’s a great opportunity for you to update this, anyway. Here’s a quick reminder how:

Happy New Year!

Ah, Christmas: that time of year when a bunch of us take time off.

2019 December 19
by admin; 5,096 views


It’s been a long year, hasn’t it? And you deserve some time off. Why not take some me-time while we and a handful of our valued suppliers do the same?

  • alpscontrols.com will be closed on 12.24 and 12.25.19, and also on 1.1.20
  • Belimo will be closed on 12.24 and 12.25. Their last shipping day of the year is 12.27.19
  • c3controls will be closed on 12.25.19 and 1.1.20
  • Dwyer will be closed on 12.31 and 1.1.20
  • Functional Devices will be closed Tuesday, 12.24 through Thursday, 12.26. Also, Wednesday 1.1.20.
    Also please note: Functional Devices will not be shipping UPS on 12.31.19.
  • Greystone Energy Systems will be closed for a half-day on 12.24, then they’ll be closed from 12.25 through 12.27, and also on 1.1.20
  • Johnson Controls will also be closed on 12.24, 12.25, 12.31, and 1.1.20
  • Sierra Monitor Corporation will be closed for inventory and will not be shipping from 12.24.19 through 1.5.20
  • Spartan Peripheral Devices – not exactly a closure, but they are pausing their usual offer of free ground freight for all USA and Canada, 5-10 day delivery, until 1.10.20
  • Tasseron Sensors & Controls will be closed from 12.25 through 12.27, and also on 1.1.20.

OF COURSE you’ve probably seen our annual Christmas video, but if for some reason you haven’t, just jingle-bell out here to YouTube to watch it.

And hey: please have a peaceful, safe, and joy-filled Christmas and a Happy New Year from all of us at alpscontrols.com!

Up close and muddy with the alpscontrols.com
2019 Terrain Race team

2019 October 21
alpscontrols.com terrain race team
In front from left, Joel Miller and Ernie Larson;
Back row from left, Gabriel Porro, Chris Colacito, Jeremy Roberts, Brandon North, and J.J. Maloney.

It rained pretty much all morning in Monroeville, PA on a grey October 12th. Ordinarily, that might mean the weekend’s plans would have to be changed: sitting by the fireplace instead of having a picnic; cleaning up the house instead of mowing the lawn. But to the Terrain Race team from alpscontrols.com, the rain and cold simply meant that the conditions would be ideal for running, climbing, crawling and slopping through the water and muck.

The race — a 5K jaunt through woods and mud, overcoming about 15 obstacles — is a daunting one, even more so before the sound of the starter’s pistol.

I’ve always wanted to do one of these. I was nervous at first – I just turned 50 this year and I didn’t train beforehand — but it was a blast! I think I did really well and I’d do another one next week if I could.

Chris Colacito, Key account manager

But once the team got going, it was clear that all 7 would look out for each other, help each other out, and bond strongly together as a team-building exercise.

alpscontrols terrain race team
The alpscontrols team — resplendent in their custom-ripped, bright yellow, red, and black logo dress shirts — set out on a grueling 5K mud-and-obstacle run.

“It’s always nice to hang out with the guys outside of work,” says customer service rep Jeremy Roberts. “It’s a great chance for us to build team morale. In an event like this, you get to see who your coworkers really are.”

Among the obstacles that challenged the team were a set of Tarzan swinging ropes (the consensus of the team was that Ernie dominated these), a muddy slide down a ravine into a 4-foot-deep swamp-pond — “So cold,” says Chris. “Everyone’s moaning. It’s hilarious.” — a massive, heavy, low-to-the-ground cargo net requiring the team to crawl, slither and roll through the mud beneath it, and a particularly difficult upside-down — and uphill! — pole-and-ring climb.

At the end of the course, the team had to scale a 16-ft-high cargo net — not by any means a simple task after so much rain and physical punishment up to that point. But the team pulled together and helped each other out.

That cargo net was sweet! We all went through it together — and it really helps you back here in the office afterward. We’re all on a good page together. It legitimately helps us in our work after we’ve done stuff like that.

Joel Miller, Customer service
alpscontrols terrain race cargo net

At the race’s end, the soaked, mud-caked warriors exult in their triumph. Medals are bestowed. Tons of pictures taken. Stories shared and bonds strengthened. “It was fantastic, a great time,” says Brandon North on the customer service team. “Just to know you could do it, and see the guys in a different light. Maybe next year more of us will do it together.”

I had done this before, but it was great fun to do it again with these guys as friends. Not everyone’s at the same level so it’s a fun bonding experience, the guys all helping each other, working as a team.

Ernie Larson, Customer service supervisor
alpscontrols terrain race team medals

Get 10% off selected differential pressure products from Setra Systems!

2019 August 6
by admin; 1,210 views

Limited-time special offer: take advantage of discounted prices until 9.15.19!

Known for their quality and reliability, differential pressure transmitters from Setra Systems are designed with premium capacitive sensing technology and capable of measuring both liquid and gasses.

And right now you can save 10% when you order these on alpscontrols.com:

MRG Multi-Range General Pressure Transducer

Combines the flexibility of a multi-range with the performance of a single range transducer.

With 8 selectable ranges and 3 selectable outputs, easily adjustable on the job with a flip of a switch or jumper.

Get 10% off the MRG from Setra Systems on alpscontrols.com

MR1 and MR2 Multi-Range General Purpose and Critical Pressure Transducers

The MR1 and the MR2 from Setra Systems are ideal solutions for any general or critical HVAC applications, offering total flexibility to make changes on the job site.

8 field-selectable ranges, boxed in an IP67/NEMA 4-rated housing, and sealed with a gasket to make them wash-down capable for difficult applications.

Get 10% off the MR1 from Setra Systems on alpscontrols.com

Get 10% off the MR2 from Setra Systems on alpscontrols.com

2651 Very Low Differential Pressure Transducer

A low differential pressure transducer that uses a dead-ended capacitive sensing element that requires minimal amplification, and delivers excellent accuracy and longterm stability.

A cost-effective solution that offers an excellent price-to-performance ratio and meets the requirements in all typical HVAC applications.

Get 10% off the 2651 from Setra Systems on alpscontrols.com

After 24 years, Pat Goettel says good-bye, and we all cry.

2019 July 18
by admin; 2,344 views

Here’s what you need to understand right off the top: before Patricia Goettel came to work at alpscontrols.com, we only had a small handful of employees. We didn’t have departments for sales, marketing, or even software development.

In 1995, Pat joined alpscontrols. And then became the person who would set the standard for our world-class customer service.

Now, 24 years later, we pride ourselves on that service — and we know, right now on the eve of Pat’s retirement at the end of July 2019, that she’s the one who guided and shaped it into reality. alpscontrols President Dave Meyers says,

Pat was here from virtually the beginning, and she set the tone for what good customer service looked like. She demanded that we get back to customers quickly, that we answer the phones promptly and professionally. She took that role and helped develop all of the support processes that we use today.

Back then, alpscontrols.com was small. Really small. Like “three people huddled into a tiny room” small. We started out not so much of a stand-alone company, as much as a procurement resource for control contractors to pool together and get better pricing. Pat and the rest of our small team would take orders via phone or fax — logging them onto Excel spreadsheets and calling them into the small number of suppliers that we had.

Taking orders over phone and hand-typing them into Excel. Yep, that was 1995, all right.

In the ensuing years, Pat, through the many customer service employees that she has trained, has been instrumental in guiding us toward our current business model: efficient ordering; friendly, smart, and responsive product support; and paying attention to customers like a mother watches over her family.

Because that’s how many of us think of Pat: she’s our company mom. She cares deeply for our customers and vendors. She nurtures every transaction until she’s certain it’s right, and complete, and beneficial to everyone. And she remembers — with no exaggeration — a staggering, comprehensive history of alpscontrols, our customers, our transactions, and our legacy. Customer Service Supervisor Ernie Larson joined Pat’s team about 11 years ago, and he deeply admires what she has achieved, saying:

The customers love her because she knows them all personally, with intimate knowledge of their lives and their business. Pat reaches them on a personal level, and it’s the same with our suppliers. They know she gets things done, and her knowledge of the website is ridiculous!

The ending of Pat’s tenure at alpcontrols.com also comes with another, unexpected, milestone: she’s the first member of our staff to retire, so in addition to feeling her loss on a personal basis, we also have no clue what it’s like to move forward without someone who is so important to us. It’s extraordinarily difficult to imagine alpscontrols without Pat. August 1st will come without her sitting — at the insanely early, way-before-office-hours that were her tradition — at her corner desk in our support area. That desk area is like the beating heart of our company, a bullpen where people gather and thousands of spontaneous discussions have been launched: of products, POs, manufacturers, shipping, deadlines, and so much more. Her desk is where we’ve shared everything from news and surprises to laughter and donuts. Her desk will be empty and we will feel the vacuum of her absence with the memories of so many business and personal moments we have shared with Pat. Jim Kalafatis, who has worked closely with Pat for 21 years, knows he will acutely feel it when she’s gone:

I’ll miss her. She is strong-willed and extremely determined, and I’ve always admired her personal dedication to our customers and vendors as people and friends first. I’ve seen Pat go to bat for them time and time again, and she always defends their needs over everything else. It’s something I’ve learned from her, something I know many of us at alpscontrols will take with us after Pat leaves for retirement.

Personal dedication. Getting things done. Sky-high standards of service and professionalism. A warm and supportive nature to everyone our business touches. These are the things we’ll keep with us when Pat Goettel says good-bye to alpscontrols.

And as she goes, we’ll send our love, our gratitude, respect, and more than a few tears along with her.

For more memories of Pat’s long dedication to service at alpscontrols, take a look at this video:

UPDATED 5.22.20: Upcoming price increases from our manufacturers.

2019 June 26
by admin; 1,648 views

Sad, but true: sometimes our manufacturers increase their prices. We don’t like it any more than you do, but it’s a simple truth of our industry that prices can, over time, change.

So why is there a picture of a puppy over there on the left? Well, we thought it would make you feel better about the news. Did it work? It’s a cute puppy, right? Everyone likes cute puppies.

But here’s how you can turn this frown upside down: when you know when a price increase is coming, you can buy now from these suppliers and save money before the change.*

Anyway, here’s a current list of upcoming price increases from our manufacturers. We’ll update this list over time, so check back periodically to see what’s new and what’s coming up.

Thanks for reading.

* Pricing policies among manufacturers may vary. Orders placed too close to an increase deadline may not be honored at the pre-change price. Please contact our customer service team for specific bid- and project-related pricing questions.

 

Connect-Air CableM8 Giveaway: We Have a Winner!

2018 July 3

Remember back in April when you could enter for that sweet giveaway for a Connect-Air CableM8 after buying 5,000 feet (five boxes) of cable?

Well, we’ve got a winner! ABM Building Solutions, LLC will walk away with Connect-Air’s all-in-one cable distribution system, which is able to carry up to 10 cable pulls, tools, additional reels, and other parts. Recently our Regional Sales Manager for the Western U.S. Jim Kalafatis met up with Connect-Air’s Regional Sales Manager Ed Serrano to award the prize to Paul Chapling, who is the Operations Manager at ABM’s Sacramento, CA, branch.

When asked how he would use the Cablem8 on an upcoming job, Paul was quick to point out the obvious: “Well…we’re gonna pull wire with it,” which got us all laughing.

Left: Ed Serrano, Regional Sales Manager at Connect-Air; middle: Paul Chapling, Operations Manager at ABM (Sacramento); right: Jim Kalafatis, Regional Sales Manager (Western U.S.) at alpscontrols.com

He also said,

I can definitely see this saving time. Very convenient just for packing the wire up. This wire management system will probably save us labor, time in pulling wire. And then also the ability to to throw the rolls of wire down below, for those pulls that we do. It looks nice rolling it around people’s offices. Typically we’re doing retrofit work, so this would fit right in.

Chapling also explained that the CableM8 was preferred by his engineering department for its ease of use. “We can get all of our Connect-Air wire right away. It’s an efficient time saver we have right here!”

You can also become eligible win amazing prizes! Stay connected to our giveaway offers by subscribing to our newsletter here and filling out the brief form at the bottom of the page.

CO₂ Leak Detection in Refrigeration Applications

2018 May 23

Growing Need for CO2 Leak Detection

Regulations, market drivers and trends reflect that carbon dioxide (CO2) is increasingly being used as a refrigerant in a variety of applications. This includes applications such as:

  • Supermarkets / Grocery Stores
  • Cold Rooms
  • Walk-in Freezers
  • Industrial Cold Storage
  • Food Manufacturing / Processing

CO2 is less environmentally harmful than many of the gases previously used in these refrigeration applications, having a significantly lower Global Warming Potential (GWP)than HFC and HCFC refrigerants. Some of these gases, such as R-404A, are beginning to be phased out of use due to environmental impact and regulations. These factors contribute towards CO2 becoming an increasingly attractive option for use when balanced against the requirements of regulations such as F-Gas (EU Regulation No. 517/2014), and the US EPA Clean Air Act Section 608.

Furthermore, the manufacturers of refrigeration systems continue to develop a growing range of ever more efficient and cost-effective CO2 refrigeration system options, enabling their wider adoption into commercial applications.

The Need for CO2 Leak Detection

While beneficial in environmental impact, CO2 is a potentially harmful gas to humans if sufficiently high concentrations are present. Typical figures stipulated for CO2 exposure by OSHA are:

  • 5,000 ppm – Occupational Exposure Limit (OEL)
  • 40,000 ppm – Immediately Dangerous to Life or Health (IDLH)

Refrigerant safety standards, including EN 378-1:2016 and ASHRAE 34-2013, include these exposure levels to determine the safety of a refrigerant system and the cases inwhich refrigerant leak detection is mandated. These use-cases will typically include refrigerant detection in machinery rooms and

other refrigerated spaces, including cold rooms and walk-in freezers. Where larger refrigerant charge sizes are used, the potential for mandated refrigerant leak detection in larger spaces, such as storage freezers, is increased.

As with all refrigeration systems, over time there is the potential for leaks to occur. Causes can include improper maintenance, mechanical wear, inadvertent damage or improper maintenance. With pressurized systems, these factors can contribute to a significantly higher risk of leaks. Due to design requirements, CO2 refrigeration systems typically operate at high pressures; sub-critical or trans-critical system pressure ratings often operate in excess of 2,000 PSI. These high pressure ranges mean that in the event of a major CO2leak, the gas can escape into a space at very high leak rates.

An example:

Taking an example of a walk-in cold room / freezer, with a room volume of 1,000 ft3 / 28.3 m3, and a typical rate of one air exchange per hour, the following can be determined:

  • A leak of CO2 at a rate of 7.5lb/hour, or 3.4kg/hour, will create an atmosphere containing 5,240 ppm of CO2 in just 5 minutes. This surpasses the OEL and reaches a level to which workers should not be exposed.
  • A leak of CO2 at a higher rate of 1lb/minute, or 454g/minute, will create an atmosphere containing 41,920 ppm of CO2 in just 5 minutes. This surpasses the IDLH level, and would be highly and immediately dangerous to personnel entering the space.

These theoretical examples show that CO2 leaks in refrigerated spaces have the potential to become dangerous very quickly. Effective CO2 leak detection can be an essential tool in maintaining a safe environment.

Selecting an Effective CO2 Leak Detector

CO2 is monitored in a wide variety of applications, including Indoor Air Quality (IAQ), occupational workplaces and refrigeration applications. However, it should be noted that not all CO2 monitoring devices are suitable for leak detection in refrigeration applications.

Two key factors that should be considered when looking for a suitable CO2 leak detector relative to the applicable application are Response Time and Operating Temperature.

Response Time

The rate at which CO2 can leak and create a dangerous environment makes response time a critical factor in delivering effective CO2 leak detection. Instruments suited for monitoring of gradual changes in the atmospheric CO2 level, such as used in IAQ applications, may not be suitable for leak detection purposes, where a fast response is needed to ensure that a dangerous working environment is not created and/or entered. It should be advocated to review both the stated response time of the sensor being used in a leak detector, and most importantly the response time of the instrument. Different instrument designs can affect how quickly gas can diffuse into a CO2 sensor.

For example, a sensor can be directly presented to the atmosphere being monitored, thereby helping deliver a fast response time, or the gas may need to diffuse down a capillary tube to enter the sensor which would significantly increase the response time of the instrument and negate the stated response time of the sensor itself. It is imperative that the gas detector response time is appropriate for the designated application to provide the benefit of its intended use.

Operating Temperature

Operating temperature is also a key factor in selecting an appropriate CO2 leak detector for a refrigeration application. There are comparatively few CO2 sensors available on the market that are specified for use at temperatures lower than 0°C / 32°F, with response times required for effective use in the refrigerant gas detection applications. As the use of CO2 in refrigeration continues to grow, it becomes imperative to ensure that sensors appropriate for use in low temperature environments are used by instrument manufacturers whose products are intended for leak detection in refrigerated spaces.

Fundamentally, it can’t be determined what behavior a sensor would exhibit if run outside of its specified operating range without test data, as each sensor may behave differently. What can be stated, is that any reading could be invalid and the device behavior could be undefined. At best, the sensor may be inoperable and a fault detected; at worst an invalid or inaccurate reading may be provided. It could be argued that a sensor operating outside of its designed specifications is less useful than none at all, as it may provide false confidence the gas level is being accurately monitored and its benefit of installation and use is nullified, creating risk of exposure.

Summary

CO2 refrigeration systems are increasingly used in commercial applications, a trend which is expected to continue. In turn, this creates an increasing need for effective CO2 leak detection systems to be employed, helping to enhance the safety of those working in refrigerated spaces. CO2 can be a dangerous gas in sufficient volumes, so care should be taken in selecting an effective solution with an appropriate response time and operating temperature.

Original article provided courtesy of Bacharach