Sentry Saf-T-Vise Corrosion Monitoring Probes

Part #
Sentry Saf-T-Vise Probes

Sentry Saf-T-Vise Corrosion Monitoring Probes

Sentry Saf-T-Vise probes can be inserted and retracted within a pressurized system for applications that need continuous or one-time corrosion monitoring.

An electrical resistance (ER) probe measures two types of corrosion, electrochemical and mechanical. It works in environments that have poor or non-continuous electrolytes, such as vapors, gases, soils, wet hydrocarbons and nonaqueous liquids. These conditions enable the material to corrode.

A linear polarization resistance (LPR) probe measures the electrochemical type of corrosion and is most effective in water-based solutions. This type of probe provides a near-instant measurement of the corrosion rate.

Knowing the corrosion rate at a given moment allows an operator to monitor the effectiveness of a chemical program, propose changes, and make adjustments quickly based on the probe readings.

The Saf-T-Vise STV-ER and STV-LPR probes offer a unique, patented safety feature to increase operator safety: an easy-to-use collet that locks the shaft within the process stream in both low and extremely high-pressure conditions.

The probes are easy to insert and remove from a pressurized pipeline without interruption of the system. The Saf-T-Vise probes may be installed permanently to provide continuous information or portable to gather on-demand data from multiple locations.


To avoid corrosion and equipment damage and enable accurate monitoring, Saf-T-Vise comes with a materials certification and test summary to confirm the product’s materials. These documents improve material traceability to meet the requirements.

Saf-T-Vise corrosion monitoring probes protect operator safety by offering mechanical insertion capability in-high pressure process streams. They can be installed in any orientation at various extension lengths up to 20 feet to reach locations that are difficult to access.

The components are tested at safety pressure 1.5x the operating pressure. This validation feature assures compliance with PHMSA regulations and NACE standards, assuring safety while avoiding substantial financial penalties.

Finally, Sentry’s 30 years of experience comes with the Saf-T-Vise brand. This expertise ensures the product you select will work for your needs, and our experts also advise your team on a suitable installation location.


  • “Bleeder valve” to relieve excess process pressure
  • Patented locking collet safely secures the probe within the process stream until released by the operator
  • Integrated safety chain specific to product model
  • Hand or mechanically insertable to protect operator safety
  • Remote data collection and portable data logger options available
  • All components that contact process fluids are composed of 316/316L SS, excluding probe electrode
More Information
Wetted Materials 316/316L SS
Pressure Rating 3000 psi (207 bar)
Temperature Rating 500°F (260°C)
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