ValveWatch® - Sensors

Sensors

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.

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.

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.

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.

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