Archive | Transmitters

Ammonia Vent Line Gas Detector

Ammonia Vent Line Gas Detector

Critical Environment Technologies Canada Inc. (CETCI) is pleased to introduce our Ammonia (NH3) vent line gas detector.

The LPT-A Vent Line Ammonia Transmitter (P/N: LPT-A-VLT-NH3-S) is designed to detect and alert operators of high concentrations of ammonia in vent lines of refrigeration systems caused by equipment failure or system over pressurization. Slow leaks of refrigerant can be costly over time and a dangerous situation could present itself if a high pressure release were to occur. Typically, normal vapour flow is handled by the ammonia compressor, but a vapour flow in excess of the compressor’s capacity will enter the vent stack and can cause a large amount of the gas to travel up the vent line and discharge. In addition, higher than normal concentrations of ammonia can be caused by faulty valves, damaged or worn equipment, contaminants and/or equipment failure or system overpressure. Without safety precautions in place, hazardous levels of ammonia from equipment failure or over pressurization could cause an explosion and seriously jeopardize the health of workers and people in the surrounding area.

The VLT provides continuous, real-time monitoring of the levels of ammonia in the relief vent line. It can be configured to alarm at a pre-determined set point (1.0% / 10,000 ppm is recommended) and send an analog signal to activate a remote strobe or horn, or communicate with a controller or PLC to activate or shut down equipment as required.

The catalytic NH3 sensor has a range of 0 to 3% volume (0 – 30,000 ppm) and is potted into a 2” pipe fitting protruding from the back of the enclosure which connects to a coupler that is used to secure the device to a mounting pipe. The VLT may be mounted on the vent relief stack above the pressure relief valve using the 3/4” cast steel coupler. Or it can be mounted outside on the relief header, 3 to 5 feet above the roof-line. Unless exposed to very high concentrations of ammonia for a prolonged period of time, the sensor should last 3+ years.

The circuitry is housed in a durable, copper coated, ABS/polycarbonate enclosure that is water / dust tight (drip proof) and corrosion resistant. The factory installed splash guard on the (unused) front vent protects the interior from water entering the enclosure. A water tight gland provides a water tight conduit entry for the cable.

The VLT is virtually maintenance free, but removal from the pipe extension will be required to access the sensor during calibration. Bump tests should be done monthly and a full calibration conducted yearly (unless a significant exposure incident occurs, after which additional bump tests and/or calibrations are required to ensure the device is working properly and the sensor has not been poisoned).

Vent line systems should always be treated with extreme caution and workers should assume a relief valve could release at any time. Take necessary safety precautions and follow industry standard practices when installing, servicing and calibrating the VLT.

 

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 www.critical-environment.com or to discuss a tailored gas detection solution for your application, contact us at 1-877-940-8741.

Posted in Products, TransmittersComments Off on Ammonia Vent Line Gas Detector

Monitoring Ozone (in the air) in Hatchery & Fish Farm Applications

Monitoring Ozone (in the air) in Hatchery & Fish Farm Applications

Critical Environment Technologies Canada Inc, (CETCI) offers strategic and reliable gas detection solutions for many applications, including ozone gas detection in the aquaculture industry.

Hatcheries, fish farms and such in the aquaculture industry require clean water to maintain a high survival rate while rearing aquatic animals. Contaminated water increases the risk of infection which in turn can compromise production. A common way to disinfect water is by generating ozone on-site with an ozone generator. Ozone is a powerful bactericide and viricide that decreases the risk of infection from water borne diseases which helps maintain a high survival rate, aerates the water and leaves no undesirable residues. However, ozone is highly toxic to humans and aquatic animals at very low levels. Standards set by OSHA allow a permissible exposure level of less than 0.1 mg/L on a time-weighted average for an 8 hour work period and a maximum single exposure level of 0.3 mg/L for less than a 10 minute duration.

For human safety, the ozone concentrations in the air should be monitored in the locations that could become contaminated with ozone. A typical ozone system for a hatchery operation has an ozone generator and three chambers. The ozone generator creates ozone which is then introduced into the first tank, the counter flow diffusion chamber. Here the oxidization of dissolved matter occurs. The first ozone gas detector should be installed in the ozone generator room to monitor for potential leaks around the ozone generator and piping structures. If the gas detector were to go into alarm, it can be configured to shut off the ozone generator, stopping the production of ozone. In addition, the ventilation and make-up air fans can be triggered to come on and go off at set intervals, including when the gas detector goes into alarm. The second chamber is the reaction or contact tank where the disinfection of the water and slow chemical reactions occur. Depending on the operation setup, the second chamber may be in the ozone generator room or in another room or general area. From the contact tank, the water gets sent to the third chamber which completes the slow reactions and the majority of the residual ozone decomposes. Any undissolved or residual ozone gas is collected and vented by way of the ozone destruction process which will destroy the ozone in the gas before releasing it into the atmosphere. A second ozone gas detector should be installed near the ozone destructor to monitor the exhaust air stream to ensure the ozone destructor is operating effectively.

CETCI’s LPT-A-O3 Ozone Gas Detector offers a fixed, continuous gas monitoring solution for hatcheries, fish farms and other aquaculture operations that use ozone to clean the water. Use as a standalone system, or combine up to four ozone gas detectors with our QCC Quad Channel Controller for larger applications. Each LPT-A-O3 transmitter features an audible alarm, LCD display with real time gas readings and a programmable relay to shut down the ozone generator. When combined with a QCC Controller, three more relays are available for triggering safety events such as switching on/off ventilation fans or make-up air fans and/or activating a remote strobe/horn. More value-added features available are two analog outputs, a data logger, manual equipment ON/OFF switch, top mounted strobe, remote strobe and horn combo and remote display module that offers the ability to view the gas level readings in a separate location from the controller and transmitters.

Ozone is a very reactive gas and can quickly corrode metals and damage plastic materials. There should be regular maintenance checks of pipe fittings, gaskets and seals all along the ozone injection system. In addition to a fixed gas detection system, it is also recommended that portable handheld monitors be used to do spot checks for leaks around piping and in poorly ventilated areas. If there is an equipment malfunction, or if tubing’s and fittings leak, or too much ozone is being produced, a properly installed ozone gas detector system will alarm and shut down the ozone generator before a dangerous environment is created and the health and safety of the workers is jeopardized.

 

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 www.critical-environment.com or to discuss a tailored gas detection solution for your application, contact us at 1-877-940-8741.

 

References

Eugster, Ulrich and Bruce Stanley “The Use of Ozone as a Disinfectant in Fish Hatcheries and Fish Farms.” Web.
   http://www.ozomax.com/pdf/article-seafood-hatchery.pdf [accessed 2 October 2015]
Gearheart, Michael and Steven Summerfelt “Ozone Safety in Aquaculture Systems.” Hatchery International (July/August 2007). Web.
  http://www.ozonesolutions.com/files/research/aquaculture_safety.pdf [accessed 2 October 2015]
Summerfelt, Steven T and John N. Hochheimer “Review of Ozone Processes and Applications As an Oxidizing Agent in Aquaculture.” The
  Progressive Fish-Culturist (1997) 59:94-105. Web. http://www.w-m-t.com/library/pdf/Summerfelt_paper_Review_of_Ozone.pdf [accessed 2
  October 2015]
WorkSafe BC “Ozone Safe Work Practices.” (2006) Web.
  http://www.worksafebc.com/publications/health_and_safety/by_topic/assets/pdf/ozone_bk47.pdf [accessed 2 October 2015]

 

Posted in Applications, Products, TransmittersComments Off on Monitoring Ozone (in the air) in Hatchery & Fish Farm Applications

CETCI’s CXT Explosion Proof Transmitter

CETCI’s CXT Explosion Proof Transmitter

Our CXT Explosion Proof Transmitter delivers reliable, accurate monitoring of toxic or combustible gases in potentially explosive and harsh environments and meets CSA and ATEX standards for use in hazardous locations where the potential for explosions is extremely high.

Click here to read more…

 

Posted in Products, TransmittersComments Off on CETCI’s CXT Explosion Proof Transmitter

CETCI Coats All Non-Metallic Enclosures to Eliminate EMI & RFI

CETCI Coats All Non-Metallic Enclosures to Eliminate EMI & RFI

Critical Environment Technologies Canada Inc. (CETCI) professionally coats the interior of all non-metallic system enclosures with a protective electromagnetic interference (EMI) coating for all their gas detection monitors and selective YES branded air quality instruments. This coating is designed to reduce or eliminate potential EMI and radio frequency interference (RFI).

For more than five years, CETCI has tested the EMI coating on the YESAIR. With good results, CETCI has decided to coat all their non-metallic enclosure products with the EMI coating. EMI / RFI shielding provides a high-level of protection without affecting the appearance or operation of the enclosure.

With the amount of electronic equipment being used nowadays, millions of waves and signals float through the air. Therefore, it’s important to protect the product from incorrect frequencies from interfering with the device. Applications, such as ambulance stations, may benefit the most from this as they have large transceivers and compressor / refrigeration rooms that use high voltage equipment.

Benefits to having a non-metallic enclosures includes reduced shipping cost due to the lighter weight of the product, easier installation due to being able to take apart the cover and base, reduced cost to produce a product resulting in savings passed onto the customers, and easier handling due to size and weight. With the many benefits of using non-metallic enclosures, CETCI feels that they are providing more value and a better product to their end users.

For more information on the entire range of gas detection systems and IAQ instruments, please visit www.critical-environment.com.

 

Want to be the first to be notified on updates?
Simply visit www.critical-environment.com, subscribe to CETCI Magazine Blog, find us on Facebook, follow us on Twitter: @cetci, connect with us on LinkedIn, or subscribe to our RSS feed.

Posted in Controllers, Enclosures, Indoor Air Quality, Products, Self Contained, TransmittersComments Off on CETCI Coats All Non-Metallic Enclosures to Eliminate EMI & RFI

AST Analog Transmitters

AST Analog Transmitters

The AST series are rugged, reliable analog transmitters available with electrochemical, catalytic or solid state sensors to detect a wide range of gases. AST transmitters convert the raw signal from a sensor into a useful output that can be sent to a controller or building automation system. The standard housing is rugged PVC and an optional watertight polycarbonate housing is available to suit different applications.

AST

Posted in Products, TransmittersComments Off on AST Analog Transmitters

Transmitters

Transmitters

CETCI makes rugged, reliable analog transmitters in several configurations to suit many different applications. They are available with a variety of sensor types to detect a wide range of gases, including electrochemical, catalytic, infrared and solid state. Several enclosure options are available to meet the environmental requirements. CETCI analog transmitters feature 4 to 20 mA linear output signals, automatic thermal resetting fuse and LED indication for power and alarm. Options include a field settable dry contact relay and a local digital display. Calibration and maintenance procedures are simple and are easily performed in the field.

AST-sm

Posted in Products, TransmittersComments Off on Transmitters

Archives

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.