The 04 Series Single Gas Monitors are compact personal gas monitoring instruments for facilities that need dedicated monitoring of one gas or a defined gas combination in a portable format.
Available models support monitoring for CO, H2S, O2, CO with H2 elimination, CO and O2, and select toxic gases, giving industrial users several options within the same single-gas monitor family.

Process Controls Corporation supplies the 04 Series Single Gas Monitors for industrial environments where pocket-size portability, visual/audible/vibration alarms, field-serviceable components, and application-specific gas selection are important purchasing considerations.
Key Characteristics
- Single-gas monitor family with CO-04, HS-04, OX-04, and SC-04 configurations
- Detectable gas options include CO, H2S, O2, NH3, Cl2, HCN, NO2, PH3, and SO2
- CO with H2 elimination and CO & O2 dual sensor options available
- Visual, audible, and vibration alarms are standard
- Three preset alarms are user adjustable
- Field-serviceable design with replaceable sensors and filters
- Pocket-size housing with alligator clip and 360° rotation
- Impact, dust, and water resistant enclosure with IP-67 rating
- Operates on two AAA alkaline batteries, with operating time dependent on model
- Includes datalogging capability and automatic backlighting during alarm conditions
Ideal Applications
- Hazardous material response
- Mining operations
- Refineries and petrochemical facilities
- Water and wastewater treatment
- Pharmaceutical facilities
- Utilities
- Chemical plants
- Fire services
Product Family Includes
- CO-04 Carbon Monoxide Single Gas Monitor
- HS-04 Hydrogen Sulfide Single Gas Monitor
- OX-04 Oxygen Single Gas Monitor
- SC-04 Toxic Gas Single Gas Monitor
- CO-04C CO with H2 Elimination Single Gas Monitor
- CX-04 CO & O2 Dual Sensor Monitor
Industries Served
- Hazardous Material
- Mining
- Refineries/Petrochemical
- Water/Wastewater Treatment
- Pharmaceuticals
- Utilities
- Chemical Plants
- Fire Services
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