Gas Detection Maintenance FAQs.
What types of gas detectors do you service and repair?
We service and repair portable handheld, and wireless/connected gas detectors from major manufacturers. Supported sensor types include combustible (LEL), oxygen (O2), toxic gases (CO, H2S, NO2, SO2, Cl2, NH3, HCN, etc.), and specialty sensors on request.
How often should gas detectors be serviced?
Recommended service intervals depend on device type and environment. Portable detectors typically require bump testing before each use and full calibration/service every 3–12 months. Fixed systems usually need quarterly visual inspections, semiannual functional checks, and annual full maintenance. Follow manufacturer guidance and applicable regulations.
What is a bump test and why is it necessary?
A bump test exposes the detector to a known concentration of gas to verify sensor response and alarm activation. It confirms proper functionality between calibrations and best practice is to bump test prior to each work shift or any time contamination or rough handling is suspected.
What is the difference between calibration and span adjustment?
Calibration adjusts the instrument’s response to match a known gas concentration using a certified gas cylinder. Span adjustment sets the meter’s reading at a specific concentration point. Calibration restores accuracy across the measurement range and is more comprehensive than a simple span check.
How long does a typical repair take?
Repair times vary by issue and part availability. Simple repairs (sensor replacement, battery swaps, firmware updates) often complete within 1–3 business days. Complex board-level repairs or custom parts may take 1–3 weeks. We provide estimates and status updates for each job.
Can sensors be replaced in the field, or must equipment be shipped to a service center?
Many sensor and battery replacements can be performed in the field by trained personnel with the correct parts and procedures. For warranty work, complex diagnostics, or equipment under controlled calibration conditions, we recommend sending units to our service center.
Do you provide calibration certificates and traceability?
Yes. We issue calibration certificates traceable to NIST standards for each instrument serviced. Certificates include pre- and post-calibration readings, gas standards used, technician ID, date, and recommendations.
What causes sensor drift and how can it be minimized?
Sensor drift is caused by sensor aging, exposure to harsh contaminants (siloxanes, silicones, high sulfur compounds), humidity, temperature extremes, and mechanical/electrical shock. Minimize drift by following manufacturer-prescribed bump and calibration schedules, using protective filters, and avoiding exposing sensors to known poisons.
Is repair covered under warranty?
Warranty coverage depends on the manufacturer’s terms and the nature of the fault. Manufacturing defects are often covered; damage from misuse, environmental damage, or unauthorized repairs typically is not. We assess units and provide a clear warranty determination before performing paid repairs.
What documentation should I keep for compliance and audits?
Maintain records of purchase, manufacturer manuals, calibration certificates, service/repair logs, bump test records, and maintenance schedules. Records should include dates, technician names, gas concentrations used, serial numbers, and any corrective actions. These documents demonstrate compliance with OSHA, NFPA, and other applicable standards.