Fixed Air Monitoring
Total Group provides fixed air monitoring solutions for continuous detection of hazardous gases and airborne contaminants in industrial and high-risk environments. Our service supports real-time, automated monitoring for settings such as manufacturing facilities, confined spaces and hazardous worksites. The monitoring requirements depend on the substances present, the work being performed and the areas workers occupy.
For a new project or a review of existing monitoring, start with the site’s hazard assessment and the purpose of detection. A system intended to warn of a gas release has different requirements from a program intended to measure a worker’s exposure over a shift.
How fixed air monitoring fits your worksite
Fixed monitoring uses sensors positioned to monitor designated locations. It can provide ongoing readings for the substances and conditions the selected equipment is designed to detect. A reading at one sensor does not establish conditions throughout a building, vessel or work area. Detector selection and placement need to account for possible release points and how gases move or disperse.
Portable monitoring and personal exposure sampling answer different questions. Workers may move beyond a fixed sensor’s monitored area, and some contaminants require a different measurement method. Fixed detection should therefore be considered alongside the site’s testing and exposure-assessment requirements, rather than treated as proof that every worker’s exposure is acceptable.
The UK Health and Safety Executive’s gas-detection guidance addresses detector suitability, positioning, maintenance and alarm response. These are useful technical planning considerations, not Canadian legal requirements.
Plan sensor coverage and alarm response
A fixed monitoring plan should identify which gases or contaminants need detection, the required measuring range and where readings will support decisions. Review the layout, ventilation, potential leak sources and changes caused by maintenance or shutdown work. Equipment also needs to suit the environment where it will operate.
Define who receives an alarm and who can stop work, coordinate evacuation and call for assistance. Check whether workers can recognize the warning in noisy areas or while wearing hearing protection. Agree how alarms will be communicated to operations, contractors and the site’s emergency response personnel. If the project calls for links to ventilation or shutdown controls, identify those requirements during planning.
Plan for calibration, functional checks, maintenance access and interruptions to monitoring. A sensor fault or loss of power needs a defined response, just as a gas alarm does. The HSE guidance also highlights detector failures, alarm failures and releases that sensors can miss because of their position.
Alberta examples: monitoring and exposure requirements
For workplaces governed by Alberta’s OHS Code, Part 4, sections 16 and 21 requires employers to assess potential harmful-substance exposure, establish procedures to minimize it and meet applicable occupational exposure limits. Section 20 specifies methods for measurements used to demonstrate compliance with those limits. A fixed-area reading alone should not be assumed to satisfy that measurement requirement.
For confined-space work, Part 5, section 52 requires pre-entry atmospheric testing by a competent worker using appropriate calibrated instruments. Further testing is required as often as necessary. Continuous monitoring is required where the atmosphere could change unpredictably after entry, and test results must be recorded. Requirements elsewhere depend on the applicable jurisdiction and work.
Connect monitoring to entry controls and rescue readiness
Fixed air monitoring does not authorize confined-space entry or replace the entry permit, tending-worker arrangements or rescue provisions. In Alberta, Part 5, sections 55–57 addresses effective rescue, emergency procedures, tending-worker communication and safe access for workers and rescue personnel.
Site planning should connect alarm actions with the entry supervisor, tending worker and emergency response arrangements. Consider access restrictions and how responders will receive current information about atmospheric hazards. As CCOHS explains, atmospheric testing is one component of a confined-space entry program.
What to supply when discussing your project
Send the following information to help define your fixed air monitoring requirements:
- Site location, work areas, drawings and the planned work schedule.
- Hazard assessments, safety data sheets and known gases or contaminants.
- Existing detector details, alarm arrangements and monitoring records.
- Ventilation information, available power and access restrictions.
- Site contacts, alarm-response roles and relevant entry or rescue plans.
Identify the records your site needs and who will retain them. Alberta requires confined-space test records under Part 5 and exposure-measurement records under Part 4, with different retention requirements. Discuss your monitoring needs with Total Group, or explore our Rescue services for related project support.
