Bullard COHP High-Pressure Breathing Air Carbon Monoxide Monitor – 10 PPM Alarm

Bullard COHP High-Pressure Breathing Air Carbon Monoxide Monitor – 10 PPM Alarm

Protect workers using supplied-air respirators with the Bullard COHP High-Pressure Carbon Monoxide Monitoring System, designed to continuously monitor compressed breathing air for carbon monoxide (CO) contamination.

This monitoring system is designed for industrial breathing-air applications, including sandblasting helmets, abrasive blasting respirators, and other supplied-air respiratory protection equipment.

The monitor continuously samples the compressed breathing-air supply, displays carbon monoxide concentration in parts per million (PPM), and activates visual and audible alarms when CO reaches the preset alarm threshold.

IMPORTANT: THIS SYSTEM MONITORS CARBON MONOXIDE. IT DOES NOT FILTER, REMOVE, OR REDUCE CARBON MONOXIDE FROM THE BREATHING-AIR SUPPLY.

Product Information

• Manufacturer: Bullard

• Product: Carbon Monoxide Breathing Air Monitor System

• Series: COHP

• Application: High-Pressure Compressed Breathing Air

• Monitored Contaminant: Carbon Monoxide (CO)

• US Alarm Set Point: 10 PPM

• International Alarm Set Point: 5 PPM (where configured)

• Display: Digital CO Concentration in PPM

• Alarm Type: Audible and Visual

• Normal Operation Indicator: Green LED

• Alarm Indicator: Red LED

• Sample Airflow: Approximately 0.5 Liters Per Minute

• Power Options: 115 VAC or 12 VDC

• Enclosure: Protective Polycarbonate Case

Features

• Continuous monitoring of carbon monoxide in compressed breathing air

• Designed for high-pressure breathing-air systems

• Digital display indicates CO concentration in PPM

• Preset 10 PPM alarm threshold for US configurations

• Audible alarm warns of elevated carbon monoxide

• Red LED indicates an alarm condition

• Green LED indicates normal operation below the alarm threshold

• Internal regulator and flow restrictor control sample airflow

• Protective polycarbonate enclosure

• External alarm indicators for easy visibility

• Portable or wall-mountable enclosure configuration

• Suitable for industrial supplied-air respirator systems

What the Carbon Monoxide Monitor Does

The Bullard COHP continuously samples compressed breathing air and measures the concentration of carbon monoxide present in the air supply.

A small amount of compressed air is diverted through a sampling hose into the monitor.

Inside the unit, a preset regulator and flow restrictor reduce and control the sample airflow to approximately 0.5 liters per minute.

The sample air passes through the sensor chamber, where the monitor analyzes the carbon monoxide concentration.

The measured CO level is displayed on the monitor in parts per million (PPM).

This continuous monitoring allows personnel to identify elevated carbon monoxide levels that could make the breathing-air supply unsafe.

Visual and Audible Alarm System

The Bullard COHP provides clear indications of breathing-air conditions.

Normal Operation – Green LED

When the measured carbon monoxide concentration is below the configured alarm threshold, the green LED illuminates to indicate normal monitoring operation.

Carbon Monoxide Alarm – Red LED and Audible Alarm

When the CO concentration reaches the configured alarm threshold, the red LED activates and an audible alarm sounds.

The standard US configuration uses a 10 PPM CO alarm setting.

International configurations may use a 5 PPM alarm setting.

The alarm warns personnel of potentially unsafe breathing-air conditions requiring immediate action under the facility's respiratory protection procedures.

Why Carbon Monoxide Monitoring Is Important

Carbon monoxide is a colorless, odorless, and potentially deadly gas.

Compressed-air systems can become contaminated with carbon monoxide from sources such as engine exhaust entering the compressor intake or certain compressor operating conditions.

Because carbon monoxide cannot be reliably detected by smell or appearance, continuous monitoring provides an important warning capability for workers relying on compressed air for respiratory protection.

This is particularly important in industrial environments where supplied-air respirators are used for extended periods.

Designed for Supplied-Air Respirator Systems

The Bullard COHP is suitable for appropriately configured high-pressure breathing-air systems serving equipment such as:

• Bullard supplied-air blasting helmets

• Type CE abrasive blasting respirators

• Industrial supplied-air hoods

• Supplied-air painting respirators

• Industrial respiratory protection systems

• Centralized compressed breathing-air installations

Compatibility depends on the complete breathing-air system configuration and the manufacturer's requirements.

Protective Polycarbonate Enclosure

The monitoring system is housed in a protective polycarbonate enclosure designed for industrial use.

The enclosure provides:

• Protection for internal monitoring components

• External visual alarm indicators

• External audible alarm

• Portable or wall-mounted installation options

• Convenient access to monitoring information

Power Requirements

The Bullard COHP monitoring system supports:

• 115 VAC power

• 12 VDC power

Verify the power configuration and required accessories for the specific unit before installation.

Breathing-Air Quality Requirements

The Bullard COHP must receive compressed breathing air meeting the applicable Grade D breathing-air requirements.

The sample air must be free of oil and liquid water to prevent sensor contamination and inaccurate operation.

Proper breathing-air filtration, compressor maintenance, air-quality testing, and monitoring procedures remain essential.

This monitor does not purify breathing air or correct an unsafe air supply.

Applications

• Industrial sandblasting operations

• Abrasive blasting contractors

• Shipyard and marine surface preparation

• Industrial painting and coating facilities

• Structural steel blasting

• Bridge maintenance and rehabilitation

• Industrial tank and vessel cleaning

• Manufacturing facilities using supplied-air respirators

• Centralized breathing-air systems

Important Safety Information

THIS UNIT IS A CARBON MONOXIDE MONITOR ONLY. IT DOES NOT REMOVE CARBON MONOXIDE FROM COMPRESSED AIR.

A separate, properly designed breathing-air system is required to supply air that meets applicable respiratory protection requirements.

The COHP monitor must be installed, calibrated, maintained, and operated according to Bullard's instructions.

If the monitor activates its carbon monoxide alarm, personnel must follow the facility's established respiratory protection and emergency procedures.

Never assume compressed air is safe to breathe simply because it has passed through a particulate filter, moisture separator, or standard compressed-air dryer.

Important

This listing is for one Bullard COHP High-Pressure Carbon Monoxide Monitoring System with a 10 PPM US alarm configuration.

Breathing-air compressors, filtration systems, respirator helmets, breathing-air hoses, and other accessories are sold separately unless specifically stated otherwise.

Verify the system configuration, electrical requirements, sampling connections, calibration requirements, and included accessories before ordering.

Need help selecting a Bullard carbon monoxide monitor, breathing-air filtration system, or replacement components for your supplied-air blasting respirator? Contact us with your equipment model and application—we'll help you identify the correct equipment to keep your operation working safely.