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CETCI Launches the FCS Flexible Control System, a High Performance Gas Detection Controller with Logic Control

CETCI Launches the FCS Flexible Control System, a High Performance Gas Detection Controller with Logic Control

Delta, British Columbia, Canada – Critical Environment Technologies Canada Inc. (CETCI) is pleased to announce the release of our FCS Flexible Control System. The FCS replaces the PDC, offering dramatic technological and functional improvements over its predecessor.

The FCS Flexible Control System is a sophisticated, high performance Controller that offers up to 128 gas channel configurations for monitoring toxic, combustible and refrigerant gases with versatile control functionality for non-hazardous, non-explosion rated, commercial and light industrial applications. The FCS is designed to accept inputs from digital and analog transmitters and/or Peripheral Devices (in various combinations), using Modbus® RS-485 or 4-20 mA analog input. In addition, the FCS is available with Modbus® RS-485 output or BACnet® MS/TP output for communicating with a Building Automation System (BAS).


Standard features include, a full colour, LCD touch screen with LED indicators for Power, Status and Fault, a door mounted audible alarm, an extensive menu structure with password protection, a USB port for firmware upgrades and data downloads, four internal 5-amp, dry contact relays, two configurable switch inputs and two strobe/horn output drives. The built-in data logging capabilities have a large capacity memory for saving all channel readings, configuration changes and transition data. The FCS has a maximum of 32 priorities which can be configured to define the relationships between the channels and the relays, allowing up to. Up to three conditions can be assigned to each relay. Channels can be assigned to report their Low, Medium, High and/or Fault statuses which in turn can be configured to trigger one re more relays to act on one or more of those statuses and channels. The logic control and flexibility of the priority levels is immense, allowing numerous monitoring and alarming configurations.

Optional, value added features include, internal analog inputs (AI) and/or analog outputs (AO), a top mounted strobe and a locking door. The FCS, like our new suite of products, uses our signature black enclosure that is IP54 rated when the optional water tight buzzer is installed at time of order.

Depending on the type and size of the application, the FCS may require additional devices to create the complete system. For networks that extend over a large area there is the potential for data noise and a reduction in the signal. The LNK-XT Network Extender is a signal booster that extends the range of the Modbus communications. An LNK-XT is recommended every 610m (2000ft) and up to 6 of these devices can be used on one FCS network. For very large system application and/or very long wire runs, the Remote Power Supply is available to boost the voltage and provide a renewed amount of power to compensate for voltage drops. The RPS-24VDC converts 90-240 VAC power to 24 VDC power. If more than the four internal relays are needed, two remote devices are available – the RLY-4 which offers four contacts and the RLY-8 that offers eight. All relays are rated at 5 amps. A maximum of 56 relays can be accommodated by the FCS. In the event that the optional internal analog inputs and/or analog outputs are insufficient, there two peripheral devices, the LNK-AI and the LNK-AO available. The LNK-AI offers 4 analog inputs and the LNK-AO offers 4 analog outputs. Depending on the internal AI and AO configurations, up to a maximum of 14 LNK-AO and 14 LNK-AI devices can be connected to the FCS.

The FCS is ideal for use in large, enclosed parking facilities, indoor recreation facilities, food processing plants, refrigeration plants, chemical storage rooms, manufacturing plants and many more.

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CETCI Launches the DCC-MRI Oxygen Monitoring System

CETCI Launches the DCC-MRI Oxygen Monitoring System

Delta, British Columbia, Canada – Critical Environment Technologies Canada Inc. (CETCI) is pleased to tell you about the DCC-MRI Oxygen Monitoring System for MRI room applications in hospitals and clinics. The DCC-MRI replaces our GEM-MRI, offering technological and functional improvements over its predecessor.

Magnetic Resonance Imaging equipment is cooled by compressed gas. Compressed gas, if it leaks will displace Oxygen, creating the potential for an oxygen deficient or hazardous atmosphere. To meet general health and safety protocols, Oxygen monitoring devices are required to be present in MRI rooms. However, due to the strong magnetic field inside the MRI room, electronic equipment tends to not operate properly when mounted inside the room. The DCC-MRI system is designed to be installed on the wall outside of the MRI room with a flexible, sample line running from the inlet port fitting to the sampled environment. The factory tested maximum length of line is 15.24 m (50 ft). The DCC-MRI constantly monitors the target air area and indicates real time Oxygen levels on the LCD display.

The system is designed with an internal flow detector, sample draw pump, adjustable flow meter and an internal LPT-A Analog Transmitter that houses an integral Oxygen sensor. The measurement range of the sensor is 0 to 25.0% volume Oxygen. The alarm is factory configured to a descending alarm set point of 19.5% vol to alert if there is a deficiency of oxygen in the target air area.



Features include two 4 – 20 mA outputs, one alarm level line voltage relay with field configurable time delays and trigger levels, a blocked flow alarm indicating a dirty filter or clogged tubing, a side mounted audible buzzer, an LCD digital display with LED indicators for channel alarm status and fault conditions and a door mounted Silence push button.

The DCC-MRI Oxygen Monitoring System is designed to accurately measure to government established exposure levels for Oxygen deficiency for health and safety.

For more information on the DCC-MRI, please visit

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Four Channel Gas Detector for Wastewater Treatment Plants

Four Channel Gas Detector for Wastewater Treatment Plants

Critical Environment Technologies Canada Inc, (CETCI) offers strategic and reliable gas detection solutions for many applications, including wastewater treatment plants. Our QCC Quad Channel Controller, is an ideal fixed gas detection system for this type of application.

A wastewater treatment facility is a wet maze of rooms, pipes, pumps, wells, chambers, concrete tanks and settling basins. Each treatment stage the wastewater goes through involves hazardous gases that may be already present, are produced or are added to complete the process. To ensure the safety of the workers, equipment and the facility, every area presenting a gas hazard should be monitored, including the gas storage rooms, ozone generator room and any room that gas passes through. In the larger, open areas, a fixed gas detection system is suitable; in confined spaces that operators enter and where gas may be present, portable gas detectors are more appropriate.

The most common hazardous gases found in this type of facility are hydrogen sulphide, methane, ammonia, carbon monoxide, chlorine and oxygen deficiency. Some facilities may also use ozone, chlorine dioxide or sodium hypochlorite with the chlorine during the sanitization treatment process. Furthermore, sulphur dioxide is often used to de-chlorinate the water once the treatment process is complete.

CETCI’s QCC Quad Channel Controller offers a fixed, continuous gas monitoring solution with four gas channels, three programmable relays, a door mounted audible alarm and an optional BACnet RS-485 output signal for communicating with a building automation system. The four gas channels can be configured with any combination of analog or digital transmitters with the same or different types of gas sensors. For large applications, multiple QCC controllers can be networked together, each providing another four available gas channels and 3 relays. Other value added, optional features include 2 analog outputs with a data logger, manual equipment ON/OFF switch, top mounted strobe, remote strobe and horn combo and a remote display module that offers the ability to view the gas level readings in a separate location from the controller and transmitters.

The potential for physical damage to the gas detection equipment is high in this type of harsh, wet environment. CETCI’s equipment is constructed to withstand the unpredictable water levels and acidic or caustic conditions from gases like hydrogen sulphide and chlorine when it mixes with water.


About Critical Environment Technologies Canada Inc.

Critical Environment Technologies designs and manufacturers indoor air quality and fixed gas detection systems including self-contained systems, controllers and transmitters (analog, digital and wireless). Applications include commercial HVAC, institutional, municipal and light industrial markets worldwide. Many of these applications are for vehicle exhaust, but areas of specialization include refrigeration, food processing plants, manufacturing plants, wastewater treatment plants, commercial swimming pools and many more.

For more information about our products, check out our website at or to discuss a tailored gas detection solution for your application, contact us at 1-877-940-8741.

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What is the difference between Residential and Commercial Gas Detectors and why should Residential Detectors NOT be used in Commercial or Industrial Applications?

What is the difference between Residential and Commercial Gas Detectors and why should Residential Detectors NOT be used in Commercial or Industrial Applications?

Commercial gas detectors can be as much as 100 times the cost of residential gas detectors, making the residential models financially tempting, especially for large area applications. However, there are some important differences in performance, diagnostics, regulatory standards, and configurability between the two that make using residential models in commercial or industrial environments insufficient, dangerous and unlawful.



Residential detectors are built to withstand standard household temperatures and activities, which means they are typically made of regular low impact plastic, are not waterproof or IP rated and are mounted on the wall and forgotten about. If used in a commercial setting, the enclosure alone probably wouldn’t survive a year.

Commercial detectors need to be able to endure all types of conditions such as heat, cold, water, dust, regular maintenance and possible damage from vehicles, machinery or vandalism. Commercial gas detector enclosures are typically rugged, waterproof, IP rated, locking and will last for years in mild to harsh environments.



Residential gas detector sensors are tested before they leave the manufacturing plant and do not require calibration after they are installed. Commercial gas detectors are calibrated before they leave the manufacturing plant and require a regular maintenance schedule that includes bump tests and full calibrations to ensure the device is working properly and accurately sensing gas levels.

Residential sensor technology is basic as no specialized features are required. Likewise, the protocols are basic and often follow an OFF/ON pattern whereby the sensor takes readings at intervals.

Commercial sensor technology is required to be more advanced because of the demands of the environments the sensors are placed in and the information needed to be obtained from them. Commercial sensors are continuously monitoring the air and they may be placed in humid, cold or fluctuating temperatures or spray down environments. There are many sensing technology types (electrochemical, semiconductor, infrared, catalytic, etc.) that have different sensing ranges, lifespans, resolutions, compensations, and are better suited sensing certain gas types in different applications.


Functionality / Configurability

Residential gas detectors are basically maintenance free and once installed don’t require any changes to their pre-programmed settings. The alarm is set on a timed basis and in the event there is a gas leak, it will alarm only after a time-weighted duration of over 60 minutes. Meaning in general, if the gas reading is above the average exposure allowed over an eight hour period for longer than an hour, then the alarm will sound. (Of course, if the gas reading skyrockets over a certain level, the alarm will sound sooner.)

Commercial gas detectors will alarm immediately at one or more pre-determined gas levels, usually referred to as a low alarm and high alarm. Some detectors have a mid-alarm level set point as well. These detectors can also be configured to do many other things such as start or stop ventilation systems, trigger remote strobes/horns, network with each other, communicate with a BAS or a controller, dial emergency response, data log, etc.


Ratings / Certifications and Regulatory Authorities

Residential and commercial gas detection devices are regulated by national organizations such as UL, ANSI, CSA, EMC, local and federal building code, etc. for safety and performance and each must meet different certification standards. Additionally, the standards for commercial devices are further standardized depending on use, such as non-hazardous and hazardous applications. Failure to use the correctly rated equipment in the correct application could seriously jeopardize the health and safety of people and lead to very expensive legal issues.

Then there are the regulatory authorities such as OSHA and NIOSH who have established codes and standards for permissible exposure limits to hazardous gases in the workplace, which differ from the standards set out for residential houses.
In conclusion, residential and commercial gas detection equipment is significantly different in their functionality, physical abilities, required certifications and compliance with local and national codes and standards. One should not be substituted for the other in applications they are not approved or intended for. It is important to understand what features and benefits the different types of gas detectors offer, where and why they should be used, and the rules and regulations that govern that use to ensure that the health and safety of human lives is protected properly and with due diligence.


For suggestions on gas detection systems, indoor air quality monitors and calibration, please visit


Written by Rebecca Erickson

Sensor Insights. The Difference Between Industrial, Commercial and Residential Sensors
Mike Justice, Grid Connect. June 12 2015

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Calibration Could Save Your Life

Calibration Could Save Your Life

There are numerous gases, some humanly detectable and others not, leaking around in the places where we work and play that could be potentially life threatening to us living, breathing beings if they exist in excess of healthy concentrations. Luckily, there are gas detector and indoor air quality systems to detect and alert us when levels become undesirable and potentially lethal. But what good are these systems if their readings are unreliable or inaccurate and alarms aren’t going off when they should be?

It isn’t uncommon for detectors to be installed and never serviced again, even though government regulations such as Occupational Health and Safety Guidelines and many companies’ operation and safety manuals state they should be serviced on a regular basis.

A gas detector is a safety device. A properly functioning gas detector could be the difference between life and death. Making sure such a device is working properly on a regular basis should, without question, be a part of a scheduled maintenance program. The calibration frequency really depends on the type of system and how it’s being used. For example, portables should be calibrated more frequently because they are used in changing environments. Fixed systems may be calibrated quarterly, bi-annually or even annually depending on the unit. It is good practice to check the gas sensor more closely (every week) during the first 30 days after installation to ensure it is performing as expected and adapting to its new environment. Any problems such as inappropriate location, interference from other gases or issues with sensitivity can then be corrected and your expectation in its performance can be set with confidence.

Regardless of what type of gas detector or indoor air quality system you have, monthly Bump Testing is highly recommended especially for applications involving more dangerous gases and interactions with people, such as Ammonia sensors in ice rinks and Chlorine or Ozone sensors in swimming pools. Bump Testing involves flowing a sample of target gas over the sensor in question and checking that the response is strong enough to confirm response and activate an alarm condition.

Wear and tear on a device may also affect its performance and reliability. Therefore, it is important to inspect fixed and portable gas detectors and air quality monitors for accidental or deliberate damage on a regular basis. Check the housing for cracks, water damage, loose screws and wires, and make sure the filter is clean (if applicable).

The procedure for calibrating the sensors should be simple, repeatable and economical.

  • Establish a preventative maintenance schedule and stick to it – whether you do the work in house or hire a reputable technician
  • Follow the manufacturer’s instructions on how to properly calibrate your detectors
  • Make sure you use the proper calibration adapter that will allow the gas to properly diffuse around the sensor
  • Make life easier by buying a calibration kit so you have all the tools you need on hand in a convenient carrying case
  • Choose from a wide selection of calibrating gases, including Zero Air, available in 34, 58 & 103 liter size cylinders

Calibration is important because it safeguards against unreliable results; it ensures the sensors are accurately measuring to OSH provincial and state standards and will correctly alert humans of an unsafe environment of toxic or combustible gas buildup. If calibration is not already an element of your business, perhaps it should be. It could save your life!

For suggestions on gas detection systems, indoor air quality monitors and calibration, please visit

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CETCI Expands Manufacturing Capabilities & Increases Productivity

CETCI Expands Manufacturing Capabilities & Increases Productivity

Critical Environment Technologies Canada Inc. (CETCI) has doubled its manufacturing and office space to approximately 11,000 square feet as of December 1, 2010.

The service department and production department for portable IAQ instruments have moved into the new additional space. Meanwhile, production department for fixed gas detectors has utilized the space vacated by the portables and service departments in the current plant. Lean manufacturing process principles will continue to be executed as it is one of the basis of CETCI’s success.

The expansion has allowed CETCI to hire more staff in various departments to help increase overall productivity. Despite the recession, CETCI has steadily continued to grow and hire year after year. Just in the past four months alone, CETCI has hired five new employees to join their team. 2011 is no exception. CETCI plans to continue to hire more staff in the coming months to assist in the various departments, production specifically. This plant-wide expansion has and will create several new jobs locally.

With additional staff, CETCI will be able to ensure sustainable customer satisfaction by meeting their customer’s expectations in technology, innovation, support and service.

In addition to expanding plant facility, CETCI has undertaken some energy savings initiative that will reduce electricity consumption. All lighting fixtures and bulbs in all occupied spaces have been replaced with more energy efficient ones.

For more information on the entire range of gas detection systems and IAQ instruments, please visit

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Gas Detectors

CETCI gas detectors are used to detect many different gases. Some of the most common are Carbon Monoxide, Carbon Dioxide, Nitrogen Dioxide, Nitric Oxide, Ammonia, Chlorine, Ozone, Combustible Gases like Methane and Propane, Oxygen, Refrigerants and more.

IAQ Monitors

The YES Series of IAQ Monitors are essential for those responsible for conducting Indoor Air Quality (IAQ) Investigations. These instruments are specifically designed to measure and record the quality of indoor air in offices, buildings, homes, schools, parking garages, ice rinks, etc.