Master Controllers

Understanding the difference between Sequencers and Master Controllers is important. Industrial businesses have to rely on John Henry Foster, St. Louis’ Compressed Air ROI Group to help them understand these differences, and how they impact their business.


  • Rotate compressed based on time
  • Bring more on due to low pressure
  • Load only
  • Normally not fully controllable

Master Controllers

  • Configurable
  • Use rate of change logic
  • Operate other system components
  • Give full system information

John Henry Foster’s Compressed Air ROI Group can provide you with full details on both systems, and learn which is the best option for your specific situation.

AIRx & AIRx Pro Controllers

Sustain peak compressed air system performance with AIRx and AIRx Pro controllers by John Henry Foster. Capable of customizing control to match any specification, John Henry Foster can automate even the most complex systems– eliminating waste and maximizing performance of your compressed air system.

AIRx Logo
AIRx Pro Logo
Features & BenefitsAIRxAIRx Pro
Interfacing Capability
(Any brand of OEM compressor - Including VFD's)
Up to 8 inputsUnlimited # of inputs
(Unlimited distance between panels/compressors)
Automation System (Allen Bradley)CompactLogixCompactLogic or ControlLogix
Pressure ControlSingle PressureMultiple Pressure Control
Up and downstream compressor control
Latest Allen Bradley PLC controller for dependability
Easily adjustable sequencing
Built-in adjustable timing
Total system control utilizing single pressure input
Multi-level login credentials for security
Complete alarm history
Open architecture software
Test screen to confirm interfaces
Inputs for amps, pressure, temp, dew point, flow, etc.
Remote/Modbus communication for health and maintenance monitoring
Custom labeling of compressors and system components
Handshaking & Interfacing capabilities with local HMIs & existing plant-wide systems
120 Volt
NEMA 4/12 classification
Custom design and display to match any specification
Multiple compressor room integration/control
Centrifugal & booster compressor interfacing capabilities
Up/downstream dryer control
Custom design and display to match any specification

Did you know?

JHF can integrate any type, brand, or model of compressor equipment with any type or brand of controller? We will always recommend the best equipment for your application but will implement, integrate, and service your preferred brand and type of equipment.

  • Centrifugal
  • Rotary
  • Reciprocating
  • Dryer

Complete Control = Real Savings with AIRx and AIRx Pro by JHF

Innovation meets simplicity with John Henry Foster’s AIRx Pro, Compressed Air System Automation Controller. This easy-to-configure, highly adaptable controller—with complete, on-location access—makes automating even the most complex systems, easier than ever before. Fully integrate and sequence multiple compressors and dryers to provide reliable air and maximum efficiency. Realize total control and real savings today with the AIRx Pro, compressed air system controller.

Contact JHF's Compressed Air ROI Group Today!