An essential part of every complete blast operation is properly selected and well-maintained respiratory safety equipment capable of delivering “Grade D” breathing air to the operator. When using compressor technology that is driven with internal combustion engines that may be out of service, or in situations where a compressor’s air intake is near exhaust or other hazardous gas emissions, it could be possible for Carbon Monoxide or other toxic vapors to make their way into the compressed air supply. If there is ever concern that this type of contamination exists, it is strongly advised that a Carbon Monoxide monitor be used to ensure that trace amounts of harmful gases are detected and prevented from causing serious harm or death to the blast operator. In the section below we have listed some of the industry’s most proven Carbon Monoxide monitors. There are numerous ways to properly set up an efficient (and compliant) breathing air system so please don’t hesitate to contact us with any questions you might have. For your reference, we have attached a thorough explanation of what constitutes “Grade D” breathing air in a blasting application. This information is also featured in our technical library section listed at the top of the page.

“Breathing Air Quality In An Abrasive Blasting Context”

Air Systems International CO Monitor

Air Systems International is the industry leader in air quality equipment and related systems. Their C091 series airline monitor is one of the most commonly used CO Monitors on the market. This is due in large part to its rugged construction, user-friendliness and ability to be calibrated in the field quickly and easily. This unit and all its components come packaged in a heavy-duty Pelican™ case making it perfect for the toughest field applications. The sensing equipment housed within the case runs off standard 115 VAC power when available. In remote locations where power sources are limited, two 9 VDC batteries installed within the monitor will power the unit with complete functionality. A hardware kit, including all necessary hoses and fittings to connect the monitor to your air system, is included with every unit. When the unit is in operation, should the Carbon Monoxide levels ever exceed the allowable 20 ppm, the unit’s audible alarm (rated at 95 dBA)will sound and a visual light on the face of the case will light up. Upgraded high intensity audible and visual alarms are also available for this unit. The C091 is also available in a panel mounted assembly for fixed applications. The optional field calibration kit (Part # BBK-20) allows the user to do onsite calibrations of the unit to ensure is performing within the correct parameters.

C091 Monitor Brochure
C091 Monitor Operator Manual


Clemco CMS-1 &CMS-2 Monitors

Clemco’s CMS-1 and CMS-2 are proven monitoring systems capable of long lasting and dependable service. The CMS-1 is a stationary (fixed) unit that is wall-mountable and includes its own industrial regulator for fine tuning of incoming air. The CMS-2 is a portable unit housed within a durable polyethylene case with a heavy-duty dust seal built into the lid. Both units are available with either 12 volt DC or 120 volt AC power configurations. In fixed applications, either unit’s 120 volt power cable can be tied to your facility’s conduit system. A hardware kit, including all necessary hoses and fittings to connect the monitor to your air system, is included with every unit. During normal operation, the unit’s signal light will glow green indicating that steady pressure is supplied and less than 20 ppm of CO is present. Should air pressure drop below the required levels or cease altogether, a yellow light will be emitted from the indicator. Should CO levels exceed the allowable 10 ppm, the unit’s audible alarm (rated at 98 dBA) will sound and the indicator light will flash red. On either unit, an optional standalone remote alarm and siren system is available.

Clemco CMS-1 & CMS-2 Brochure
Clemco CMS-1 Operator Manual
Clemco CMS-2 Operator Manual


RPB® GX4 CO Monitor

The RPB® GX4 is an extremely versatile monitoring system that features both conventional sensing technology and a modernized user interface. Typical standalone monitoring systems will allow you to check for carbon monoxide and carbon dioxide – the GX4 gives you the option to detect up to four different gases by inserting replaceable sensors into the front panel. All four sensors are monitored simultaneously and information is displayed on the easy to read LED screen. Should the allowable level of any detected gas be exceeded, the LED light above that gas will light up and an audible alarm (rated at 103 dBA) will sound. The GX4’s mounting options include a heavy duty carrying case for portable service, mounted to a wall for fixed applications or attachment of the unit to the side of the Radex filter for direct connection to the purifier’s outlet air. One feature that truly sets this unit apart from all others is its ability to connect via wi-fi networking or Bluetooth to your phone, table or computer. This function allows the user to view real-time updates on air quality, compile performance logs for safety records and print reports. The wi-fi option allows multiple units to be linked to the same network creating a chain of information that can be viewed and logged simultaneously. The Bluetooth feature will allow a single device to connect directly to the unit when a wi-fi signal is not available. The GX4is available in either 12 volt DC or 110 volt AC power configurations.A field calibration kit is available and will allow the user to do onsite calibration checks of the unit’s sensors to ensure they are performing within the correct parameters. An optional remote alarm and light is available.