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Frequently Asked Questions
Think of your gas detectors like your eyesight. Imagine your vision is gradually getting worse, and you’re not able to see very well. Then, when you update your prescription and get new glasses or contacts, you can see clearly again. Gas detection sensors work almost the same way.
Sensors begin to drift over time, becoming less accurate and less safe. The lack of clarity in the readings will risk not starting the exhaust system when carbon monoxide (CO) is high, causing safety issues, or starting too often when it’s low, causing excessive energy costs.
Certification is the new glasses for your gas detectors.
Solid state sensors react to almost everything in the air including humidity. In many cases the ventilations system run longer than required wasting energy. Electrochemical sensors are accurate to one part per million (PPM), causing less fan runs, more energy cost savings, and better parkade safety.
In our studies, we’ve found current gas detection technology is so much better that you can actually save up to fifty dollars per parking stall, annually, in your parkade!
Gas detectors control the parkade’s exhaust fan system. When exhaust gas concentration reaches a certain level, the fan system must be activated in order to move out the contaminated air and move in fresh air. These fans use costly energy. Furthermore, in the winter, the fans move out the air you’ve already paid to heat and bring in fresh, cold air that must be heated. These excess heating costs are substantial. By using more accurate detectors, the fans need to run less often, the heaters have to reheat the parkade less often, and you save money on your energy costs.
Gasonic is Alberta's leader in gas detection. We’ve been around since 1985, and we are Alberta official distributor for all Honeywell commercial gas detection equipment. We’re passionate about doing the best thing for you, your business, and the environment.
A sample of calibration gas is used to expose the sensor to a known amount of CO and adjustments are made to ensure it’s accurate.
Exposure limits for CO are provincially regulated, and has an 8-hour occupational safety limit of 25 ppm.
Carbon monoxide, the result of the incomplete combustion of carbon-containing fuels, can be lethal and, having no colour, odour, or taste, may not be recognized as being present without the use of a detector. CO is especially dangerous because it replaces oxygen in the bloodstream. Many warning signs of CO exposure are the result of brain malfunction due to the lack of oxygen. The effects of CO depend on the concentration as follows:
  • >50 PPM - Mild headache
  • 50 to 200 PPM - Severe headache
  • 200 to 400 PPM - Weakness, dizziness, nausea, fainting
  • 400 to 1,200 PPM - Increased, irregular heartbeat
  • 1,200 to 2,000 PPM - Loss of consciousness, coma, death
  • 2,000+ PPM - Death may occur in minutes
Carbon monoxide sensors cover 50 feet radius and are mounted 900 mm to 1200 mm (3 – 4 feet)
Diesel exhaust contains mostly oxides of nitrogen and very little carbon monoxide. Nitrogen dioxide sensors are used for diesel exhaust but it is not very effective detecting low level NO2 and controlling the exhaust fans. Nitrogen oxides sensors work better is loading docks when the majority of trucks are diesel powered. The building code only requires NO2 sensors in loading docks and diesel vehicle repair shops.
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