The heart of the monitoring system is a long life pyrolizer designed to convert Benzene to an electrochemically active gas detected on PureAire’s sensor cell. The Air check Ex electronics, pyrolizer, sample pump and sensor cell are housed in a weather and explosion-proof enclosure suitable for installation in Class 1, Division 1, Group B, C, and D hazardous areas.
The instrument’s “smart” circuitry continuously monitors sensor cell status and sampling system performance. Continuous sensor cell operation is transmitted via 4-20 mA signal to PureAire controllers, PLC’s or remote alarm systems. Should a system error occur, the Air check Ex outputs a 2 mA signal to remote alarm/control systems to immediately alert control room personnel.
- Detects Benzene at PPM TLV Levels
- Enhanced Self-diagnostic Capability Decreases Downtime and Maintenance Costs
- Long Life Pyrolizer
- Dual Level User Selectable Alarm Relays
- Local Gas Concentration Digital Display
- 4-20 mA Analog Output
- Low Annual Operational Cost
|Sampling Method||Extractive Sample Draw|
|Gases Detected||Benzene (C6H6)|
|Range1 ||0 – 20 ppm|
|Operating Temperature||-20 to +50 ºC|
-4 to +122 ºF
|Local Indicator||Multi Function Back-lit LCD Digital Display|
Displays, Gas Name, ppm Concentration, AL1, AL2 & System Fault Messages
|Sensor Type||Low Cost Disposable Electrochemical Sensor Cell|
|Sensor Life||> 2 years|
|Signal Outputs||4-20 mA Analog Output|
Alarm Level 1 – SPDT AC 125 V, 0.3 A max
Alarm Level 2 – SPDT DC 30 V, 1.0 A max Resistive Load
Fault – SPDT Fail Safe
|Sampling Distance||100 ft|
|Power Requirements||2.0 A|
|Alarm Outputs||3ea. Alarm Relays: Low and High Level Gas Alarm and System Fault|
| Electrical Classification||Explosion Proof Class 1, Div 1, Group B, C, & D|
1 Other ranges available, consult factory.
Low Annual Operation Cost
The PureAire Air check Ex has a low annual maintenance cost. Combined with our built-in, long life pyrolizer and sample pump, the Air check Ex will lower your annual operation costs. When compared to competitive gas monitors, it will pay for itself in just a few years.
Connects to DCS and PLC Controls
The Air check Ex Benzene Monitor is 24 V DC powered and transmits continuous gas concentration levels to any distributive control system, programmable logic controller or PureAire’s proprietary single and multichannel controllers. The Air check Ex Monitor can be operated remote up to 1,000 meters, 0.6 miles from centralized distributive control systems.