Sentinel VPT & Watchman VPT Rotary Limit Switches from Sharpe®

Sharpe® Valves Sentinel VPT Rotary Limit Switch
Sharpe® Valves Sentinel VPT has been designed to provide the most visible and reliable valve position indication in explosion-proof environments. With a wide variety of switches and sensors available to match your application, the Sentinel is the perfect choice.


Sentinel VPT Design Features:

  • NEMA 4, 4x, 7, 9 for Explosion-Proof Applications
  • UL and CSA Certified for Explosion-proof.
  • Patented Engineered Loc-Ring Cam and Shaft Retention System provides unsurpassed sensing accuracy over the multi-million cycle life of the physical platform.
  • Clear Ektar cover offers optimum chemical resistance and strength and is environmentally sealed to prevent fogging or entry of contaminants.
  • Careful material selection provides patented indicator a rated life of minimum 1,000,000 cycles.
  • Materials of construction selected to excel in high vibration, corrosive and dirty environments, either indoors or outdoors.
  • Indicator is fully adjustable to any valve or actuator.
  • Internal Switches and terminal block are labeled for easier installation.
  • The industry's only "true" visual valve position indicator available for multi-port valves, adjustable to match the actual physical flow pattern of the valve.


Sentinel VPT NEMA 7 Material Specifications:

  • Enclosure: Aluminum with Optional Iridite for Corrosion Resistance, Optional Hard Anodizing for Severe Applications
  • Shaft: 303 or Optional 316 Stainless Steel
  • Shaft Locking Ring: Stainless Steel
  • Indicator Cover: Ektar Copolyester
  • Bearing: Bronze or Optional 303 Stainless Steel
  • Fasteners: 316 & 18-8 Stainless Steel
  • O-Rings: BUNA-N or Optional Viton
  • Cams and Splines: Acetal


Sharpe® Valves Watchman VPT Rotary Limit Switch
The Sharpe® Valves Watchman VPT has been designed to provide the most visible and reliable valve position indication in general purpose applications. With a wide variety of switches and sensors available to match your application, the Watchman is the best choice.


Watchman VPT Design Features:

  • NEMA 4, 4x for General Purpose Applications
  • CSA Certified for General Purpose applications
  • Patented Engineered Loc-Ring Cam and Shaft Retention System provides unsurpassed sensing accuracy over the multi-million cycle life of the physical platform.
  • Clear Ektar Cover offers optimum chemical resistance and strength and is environmentally sealed to prevent fogging or entry of contaminants.
  • Careful material selection provides patented indicator a rated life of minimum 1,000,000 cycles.
  • Materials of construction selected to excel in high vibration, corrosive and dirty environments, either indoors or outdoors.
  • Indicator is fully adjustable to any valve or actuator
  • Internal Switches and terminal block are labeled for easier installation.
  • The industry’s only “true” visual valve position indicator available for multi-port valves, adjustable to match the actual physical flow pattern of the valve.
  • ”Flat cover” version is available without an indicator for areas with tight space requirements.


Watchman VPT NEMA 4 Material Specifications

  • Enclosure: Aluminum with 2-part Polyurethane Paint
  • Shaft: 303 or Optional 316 Stainless Steel
  • Shaft Locking Ring: Stainless Steel
  • Indicator Cover: Ektar Copolyester
  • Bearing: Bronze or Optional 303 Stainless Steel
  • Fasteners: 316 & 18-8 Stainless Steel
  • O-Rings: BUNA-N or Optional Viton
  • Cams and Splines: Acetal

Download Sharpe® Valves Sentinel VPT & Watchman VPT Rotary Limit Switch Datasheet


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