Air Systems Portable Airline Carbon Monoxide Replacement Monitor CO-91

Air Systems Portable Airline Carbon Monoxide Replacement Monitor CO-91

The Air Systems Portable Airline Carbon Monoxide Replacement Monitor CO-91 is designed for industrial safety professionals needing reliable CO detection in breathing air systems. This portable airline monitor connects to breathing air filtration sources or ambient air pumps, providing critical carbon monoxide monitoring with audible and visual alarms to ensure worker safety in confined or hazardous environments.

Key features

• Includes ¼” industrial interchange coupling on a 5’ hose for easy connection
• Standard audible alarm at 95 dBA alerts users to dangerous CO levels
• External alarm and light activate when CO exceeds 10 ppm (5 ppm Canadian standard)
• Standard alarm jack supports remote alarm device connections
• Operates on 9-volt batteries, 8-16 VDC, or 115 VAC power sources
• High intensity 120 dBA alarm option available for enhanced alerting

Ideal applications

• Industrial breathing air filtration monitoring
• Confined space entry safety
• Ambient air pump CO detection
• Worksites requiring continuous carbon monoxide monitoring
• Environments where portable, reliable CO detection is critical

Why buyers choose this product

Buyers rely on the CO-91 for its straightforward installation, clear audible and visual alarms, and flexible power options, making it a dependable choice for maintaining safe air quality in industrial and confined space environments.

Specifications

Brand	Air Systems
Product type	Portable airline carbon monoxide monitor
Alarm sound level	95 dBA standard, 120 dBA high intensity (optional)
Alarm activation threshold	10 ppm CO (5 ppm Canadian standard)
Connection	¼” industrial interchange coupling on 5’ hose
Power options	9-volt batteries, 8-16 VDC, 115 VAC
Alarm features	Audible alarm, external alarm jack, visual light alarm

This replacement monitor is designed for seamless integration with existing airline CO monitoring systems, providing reliable detection and alerting to protect workers from hazardous carbon monoxide exposure. The CO-91 is an essential safety tool for maintaining air quality and compliance in industrial settings.

MFG Part #: CO-91

Product Type	Allegro

Shipping

We Ship Internationally - We can ship to virtually any address in the world, with some restrictions on certain products.

Standard Delivery: Ground shipping typically delivers in approximately 5 business days from our Columbus, OH warehouse.

Expedited Options Available:

• Priority and Expedited handling speeds up processing
• Overnight shipping available (guaranteed) - must order by phone before 12pm EST M-F
• Some items ship "Manufacturer Direct" and cannot be expedited

Important: Inspect your delivery before signing! Note any damage on the shipping document.

Returns Policy

30-Day Return Window: Most new, unopened items can be returned within 30 days for a full refund.

Non-Returnable Items:

• Made-to-order fall protection products
• Used vacuums, respirators, gas monitors, or air scrubbers
• Calibration gas (hazardous material)
• PAPR and specialty respiratory items (non-stock)

Restocking Fee: 30% restocking fee or shipping costs apply if return is due to buyer error.

Refund Timeline: Expect refunds within 4 weeks, though many are processed faster.

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