A4 Service Technologies

A4 Systems offers superior quality products for calibration, leak detection and inspection services by using highly accurate IIoT devices and user friendly Software to streamline data management. We develop the exact technology needed for each stage of the data management process: Acquisition, Aggregation, Analysis and Action.

Calibration Technologies

A4.RMP Reference Meter Prover

A4.RMP provides lab quality, on-site measurements and calibrations. Employing our new sensors and machine learning will enhance the reliability and accuracy of your meter calibration services.

  • Fully electronic, closed loop calibration technology
  • Program corporate standards for each client
  • A.I. and M.L. to determine calibration required
  • Dispenser Early Warning
  • Network Flow Rate Performance
  • Actionable Knowledge
  • Quarterly Calibration reports

Leak Detection Technologies

A4.STP Sump Testing Probe



A4.STP provides precision underfill leak detection for sumps and underground storage tanks. All testing is managed through SQCsurvey.com, where you can access all past testing data and analysis, as well as customize automated alerts for detected losses..



  • Potential for human error eliminated
  • Test quality not affected by groundwater/free product
  • Doesn't violate tank manufacturer warranty
  • No maximum tank size restrictions

A4.UTP Ullage Testing Probe



A4.UTP provides precision ullage leak detection for underground storage tanks. All testing is managed through SQCsurvey.com, where you can access all past testing data and analysis, as well as customize automated alerts for detected losses.

  • Potential for human error eliminated
  • Test quality not affected by ethanol enriched products
  • Test not affected by groundwater/free product
  • Doesn't violate tank manufacturer warranty
  • No minimum fuel requirements
  • No maximum tank size restrictions

A4.IMP Interstitial Monitoring Probe

A4.IMP is a solar powered interstitial vacuum monitor for upstream storage tanks. The system gathers remote sensing data and uploads the information via cellular network to SQCsurvey.com (SQC). From there, you can manage an entire network of tanks from any type of device, at any location.

  • Measures down to a 0.01 change in psi
  • Remote data acquisition
  • Programmable computer for customizing test frequency
  • Stand alone structure powered by solar

Temperature Sensing Technologies

A4.TSU.TSU Temperature Sensing Unit



A4.TSU effectively monitors the temperature levels of any piece of equipment, with automated alerts to site workers when the equipment reaches a certain threshold. Alerting workers when these thresholds are met allows for them to take the corrective actions needed before the equipment is damaged.

  • Multiple temperature probes
  • Real time temperature data acquisition
  • 30 minutes of backup battery after power loss
  • Custom temperature thresholds and time delays