MRC Global ValveWatch


All field devices, including the small data acquisition computers and communication system, are certified as intrinsically safe for Class 1 Division 1, Zone 0 installation.

Actuator Pressure Sensor

This sensor is mounted in the pressurized section of either a pneumatic or hydraulic actuator and are available in various pressure ratings for optimal scaling.

MRC Global ValveWatch Actuator Pressure Sensor
  • Ranges from 3.5 bar (51psi) to 700 bar (10,000 psi)
  • Stainless steel construction
  • Integrated terminal compartment with long or short body (5900)
  • Frequency response to 3.5 kHz
  • High over pressure capability
  • Hazardous area certifications
  • mV output
  • NPT or BSP connections


Strain Sensor

This sensor monitors the mechanical performance of the valve and actuator. A strain gauge is mounted directly on the yoke and measures dimensional changes by analyzing the amount of force between the valve and the actuator. This type of sensor can also be used to measure torque or thrust.

MRC Global ValveWatch Strain
  • High strength titanium epoxy
  • Thrust - gate valve
  • Torque - ball valve
  • Gage - 5000 ohm full bridge
  • Method of attachment - 2-part epoxy
  • Sensor can be used to indicate torque or thrust
  • ATEX - Ex i
  • Simple device on request


Dynamic Pressure Sensor

These sensors are used to detect leaks in the pipe and the sealed cavity compartment of the valve by using two equal dynamic pressure sensors mounted in the upstream, downstream and cavity positions on the valve. The sensor reports the difference in pressure at both locations. The data they collect is then used to confirm seal integrity.

MRC Global ValveWatch Dynamic
  • Range - up to 10,000 psi
  • Type - full bridge
  • Resistance - 2000 Ohm
  • Full scale output - 10mV/V
  • Excitation voltage - 1 to 10 volts


Acoustic Sensor

This non-intrusive sensor is mounted on the valve itself on or on the pipe near the valve. When the valve is in the closed position, this acoustic sensor can detect a difference in pressure across the valve, which would indicate a leak.

MRC Global ValveWatch Acoustic Sensor
  • Minimum dP for detectable gas leakage > 1 bar
  • Minimum dP for detectable liquid leakage > 3 bar
  • Valve / pipe surface temperature -40 to 225°C
  • Flow regimes oil, gas, water, multiphase

Product, suppliers, manufacturers and services vary by region. For more information, contact an MRC Global location in your region.