Fueling Stations (CNG, LNG, LPG)

Bus Garages

Bus Garages



Water Treatment and Other Hazerdous Sites

Reliable, Dependable and Durable Products

Reliable, Dependable and Durable Products

Reliable, Dependable and Durable Products

Reliable, Dependable and Durable Products

#1 Priority Our Customers

#1 Priority Our Customers

#1 Priority Our Customers

Leader in Gas Monitoring and Control Systems

Leader in Gas Monitoring and Control Systems


Featured: New intrinsically safe hydrogen sensor


Introducing Rel-Tek’s newest hydrogen gas sensor the GasBoss 100C approved for both US and Canadian markets. For use with hydrogen fuel-cell application. This sensor along with its compatible Intrinsic Safety Barrier the DBL-GB comes in two versions, the wall mount GasBoss 100C and the ceiling mount GasBoss 100/AP-C. The New sensor animatedI.S. Barrier also is available as a stand-alone product for use in Class I, Division 1 Groups B, C and D. For more information, Click Here
Approved intrinsically safe to the following safety standards:
UL 913
UL 61010-1
CAN/CSA-C22.2 No. 60079-0
CAN/CSA-C22.2 No. 60079-11
CAN/CSA-C22.2 No. 61010-1
hydrogen gas sensor the GasBoss 100C

American Flag and Canadian Flag
The GasBoss 100C can also detect 0-100% LEL of 80 different combustible gases in Groups B, C, and D for industrial and environmental applications.

Our Industry Solutions

Delivering the Best Solutions and Services to our customers.

Rel-Tek engineers design and plan a complete monitoring and control system to meet all your specific requirements, while keeping you Ahead, Way Ahead

MSHA, CANMET, UL, etc Approved Sensors, Equipment and accessories

There are over 100 approvals (MSHA, CANMET, NYC-MEA, and UL standards) covering Rel-Tek environmental sensors and accessories for use in various applications.

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Dependable Hardware

Rel-Tek's hardware are the best in the industry. They are very low maintenance and are designed and manufactured in house from ground up.

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A+++ Services

At Rel-Tek, we truly care about our customers and go out of our way to help them. That also includes troubleshooting our systems over the phone and the Internet in the event customers need help. Plus, we offer on-site quarterly maintenance service.

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State of the Art Technology (Software/System)

We have state of the art technology for gas monitoring systems, which was built from the ground up by Rel-Tek Corporation.

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We attend events and shows to meet with people in other industries and potential customers showcasing our products and technologies

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Now Available. Touchscreen Wall-Mount System with virtual keyboard

Touchscreen Wall-Mount Computer was designed for use as a zone monitoring device. This device can monitor its own zone or remotely look at other zones through the primary computer.

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Rel-Tek Corporation is ahead... way ahead.

We have state of the art technologies and equipment for all of your needs for your site(s).


What People say’s About us

“I have been in charge of installing and maintaining three of Rel-Tek's Millennia-DX carbon monoxide monitoring systems at three of our mines for over a year now. I would like to thank Rel-Tek for producing a product as dependable as the ones they provided for our operations. I have been informed by an associate of mine using a competitor's CO system, that they experience false alarms due to interference of their radios and wireless tracking system. I have not once had a false alarm at any of my three mines. The Rel-Tek CO systems have been working perfect for over a year. Thank you.”

Electronics Specialist.

Manalapan Mining Corp., Pathfork, Kentucky

“Just a quick note to let you know how much I appreciate the Rel-Tek equipment here. I tell everyone, if I were designing a facility I would specify Rel-Tek. To date we have had zero equipment failure. I have had occasion to call tech support with questions and they have always given me the answers I needed. ”

John,Facility Maintenance Manager

Southern California mass transit maintenance garage

“The Millennia-DX, GasBoss and MagiKal equipment has performed flawlessly since being installed by Rel-Tek [basic system dates from '98]. We are very satisfied with both products and service. Using Rel-Tek for our methane monitoring needs has been one of the best decisions made by this agency."”

CNG garage Maintenance Director

Simi ValleyTransit Authority, Simi Valley, CA

“I feel the sensors are reliable with or without MagiKal automatic calibration. [System dates from '95; upgraded twice, adding Magikal in '01]. We automatically calibrate [38 CH4 and 18 CO] sensors monthly, and our tanks last a year. Products are very reliable and technical support is outstanding. They are very courteous and responsive. Magikal reduces the amount of time spent on calibrating every sensor manually. ”

LNG garage Manager of Maintenance

Sun Metro Transit Authority, El Paso TX

“The Rel-Tek [CH4] sensors work very well, and the support has been helpful, although we truly needed very little, as the system has performed without failure. It actually performs better than expected.”

Well site Instrumentation Engineer.

Consol Energy, Claypool Hill, VA

“The equipment is working as we were told it should. We do an auto-calibration once a month and we have only had to replace each set of [cal-gas] tanks once so far [in four years]. I believe the auto-calibration virtually eliminates human error. We have always been able to call and get answers to any questions we had. Thank you.”

Director of Maintenance

Lowell Regional Transit Authority Lowell, MA

“We highly recommend this system. I am very happy with your product and the response from your technicians, when I called with concerns. I wish you well at your new facility and thanks again for all of your help.”


Kern High School District Bakersfield, CA

Our Customers are our #1 priority.