Control Products Inc / Controlled Fluids Inc

280 Ridgedale Ave
East Hanover,  NJ  07936

United States
  • Booth: 668

Visit #668, Control Products Inc and Controlled Fluids Inc

Control Products Inc (CPI) manufactures accumulator and cylinder position sensors up to 50ft stroke as well as waterproof limit and thermal switches, Co-exhibiting with Controlled Fluids Inc, a hydraulic Systems Integrator, who utilizing CPI sensors provides systems with feedback control.

 Press Releases

  • Last year we discussed CPI sensor solutions for Oilfield hydraulic accumulators and cylinders, but in the fast-paced world of oilfield engineering, that was a long time ago.

    For instance in 2016, CPI didn’t have a fully subsea capable (qualified to 5000ft), intrinsic safety rated (ATEX, IEC-EX) linear position sensor for hydraulic cylinders and accumulators.

    But now we do. Meet the CPI SL2000

    The CPI SL2000 was specifically designed to meet the needs of heavy duty hydraulic system manufacturers, who seek robust, accurate, and reliable solutions to position or charge sensing in long stroke cylinders or accumulators.

    With a high-tech mechanical assembly and space-age material science, the CPI sensor surpasses the durability of all other sensor measurement technologies as well as other draw wire sensor technologies. For harsh duty internal or external cylinder applications, CPI’s technology may be the most hardened, reliable solution in the world.

    Marine Riser And Tensioner System Hydraulics

    Tensioner systems come in many designs but typically employ multiple hydraulic cylinders for stabilizers or the riser will buckle when the rig moves downward, and stretch when the rig rises. If you gather around the moon pool of any offshore rig or vessel during a storm you’ll see a riser/tensioner system hard at work. These systems use a bank of hydraulic accumulators to drive piston displacements in reaction to the heaving of a heavy sea. It is crucial that the tensioner can manage differential movements between the riser and the rig in real time to prevent shearing or undue stress on the wellhead. These huge and powerful accumulators are constructed using a gas and hydraulic fluid and can drive displacements from 10 to 15 meters.

    Using the SL 2000 in Oil Platform Hydraulics

    Because the core measurement technology of the sensor is mechanical draw wire, there are far less things to go wrong with a CPI sensor in a harsh environment. Furthermore the core sensing mechanics are incompressible allowing the sensor to operate inside the hydraulic cylinder, submersed in hydraulic fluid at full pressure. This kind of mounting flexibility makes for a clean integration into most cylinders and small external form factor for applications where a short magnetostrictive sensor is used as the transducer.

    A few other notes about our linear position sensor technology.

    • Because of our innovative draw wire design, we can easily operate for the long stroke lengths in a marine riser tensioner system. CPI sensors have operated with high accuracy to 15 meters of stroke.
    • The CPI SL2000 can be mounted in any hydraulic cylinder or hydraulic accumulator that is at least 8″ ID.
    • Hardened operation is a standard feature of our design. Our sensors have no sealed cavities and are completely immune to pressure. As such, they can be mounted on the oil or gas side of the cylinder, or even outside the cylinder.
    • A patented LVDT based implementation means the core sensing technology is completely non-contacting and immune to local EMI distortions.
    • Our sensor is the only hardened sensor in the world that works with telescoping hydraulics.

    Riser Disconnect Sensing and Control

    CPI Sensors on the oil platform are also used provide critical feedback during a riser disconnect scenario. In this event, the riser must be disconnected before the rig is critically out of position with respect to the well head. Typically a tensioner ring employs six hydraulic accumulators with six valves controlled by the computer through signals from the valves and the CPI linear position sensor which is acting as the piston rod measuring system providing absolute (not relative) position measurement signals. Some systems are implemented with the cylinders mounted directly to the tensioner ring. In these systems, a riser disconnect detected by the CPI linear position sensor will cause the valve to limit the oil-flow and the riser will not gain momentum. The controlling system adjusts the position of the valves and the riser is brought up in a controlled way using input from CPI linear position sensors like the SL2000.

    Contact CPI for Questions About ATEX Rated, Subsea Capable, Harsh Duty Hydraulic Cylinder Position Sensors

    Our engineering team builds, installs, and qualifies these sensors uniquely into each application. Many options are available in the design of your sensor that can make it more robust, longer stroke, or even custom external mounting options for existing In-the-field cylinder applications.

    Please call our engineering team today to discuss your hydraulic accumulator based application or see all our harsh duty linear position sensors.

  • Explosions and failures that occur in the Oil and Mining industry can have catastrophic results. While not every incident rises to the level of the tragic Deepwater Horizon oil spill disaster in the Gulf of Mexico, the nature of drilling operations in such close proximity to highly flammable oil or gas creates an environment ripe for disaster if not managed properly.

    CPI waterproof switches and thermal switches are among the few safety limit switches in the world designed to operate reliably in these environments. Both our waterproof limit switches, and our thermal switch products are specifically designed to withstand extremes of heat, dust, moisture, wind, sand, EMI, and vibration, to allow them to be reliable safety controls in a wide variety of Oilfield and mining equipment.

    Unwanted Combustion in the offshore drilling environment generally revolves around two major sources:

    1. Gas and Diesel Engines
    2. The flammability of airborne chemicals.

    How Safety Limit Switches Control Flammability

    The use of Gas and Diesel engines in close proximity to flammable airborne chemicals poses a twofold risk. In one scenario there is potential sparking that can be caused by an improper fuel/air mix, or improper ignition timing of the engine itself. But in another scenario it is simply the surface temperature of the engine that has the potential to “autoignite” the surrounding atmosphere under certain conditions.

    Autoignition temperatures for some chemicals:

    Diesel: 410 °F Gasoline 500 °F
    Ethanol: 680 °F Hydrogen 930 °F
    Butane: 780 °F Methanol 870°F
    Toluene 990°F Xylene: 860°F

    One of the major contributors to engine overheating is the possibility of uncontrolled overspeed, especially in diesel engines. This can result in speeds of over 2000 rps but not for long! In order to insure that autoignition does not occur, engine surface temperatures must remain below the autoignition temperatures of the flammable airborne chemicals that surround them.

    How CPI J4 Series Limit Switches Work To Prevent Engine Overspeed.

    In order to detect and prevent overspeed, ASO valve switches are used to detect the position of the valve. If the valve is closed it means the engine is in a runaway condition. The engine must quickly shut itself off to prevent conditions that are suspected to have been the root cause of the Deepwater Horizon explosion of 2010. Typically Engines used on large generators (2 mega watt range) are required to have ASO valves.

    CPI’s J4 type switch is perfect for this application because they can handle the high temperatures (configurable for operation up to 400F) that other switches can’t meet. Variations of CPI’s J4 type switch can also be configured to operate in atmospheric pressure up to 50 PSIG, common to these systems.

    CPI’s J4 limit switches have an all stainless steel construction suited for the salt fog atmospheres found on offshore drilling platforms where incorporation of an Air Shutoff Valve (and associated switch) is legislated. Furthermore CPI’s J4 Switch is designed to withstand the high vibration environment found on ASO valves used on diesel engines.

    About CPI Limit Switches

    CPI has been designing and manufacturing extreme duty switches and sensors for over 50 years. Our J4 series of waterproof limit switches have been deployed in some of the toughest environments in the world, where other switches consistently fail.

    Our engineering team can design, manufacture, and qualify the switch you need in your application. We are experts in providing form, fit, and function replacements for switches that fail to last in these extreme, mission critical environments.

    CALL CPI ENGINEERING TODAY to discuss your oilfield safety requirements. Or visit us at http:/

  • SnapStat Thermal Cutoff Switches

    CPI Thermal Cutoff Switches offer some of the most reliable and dependable temperature control in the industry, and as such have many unique applications where an uncompromising approach to thermal switch design is needed. Our product family has a calibration range of 0 to 1850 degrees F and a momentary overshoot up to 2000 degrees F. They feature rapid response time in either snap action, bimetallic, rod & tube, or solid state configurations.

    Additionally these parts are tough, designed to withstand shock and vibration and are environmentally sealed to ensure long operating life under the most severe operating conditions.

    Applications for CPI Thermal Switches.

    Thermal switches are specified as cut-off switches because they represent a straight-forward approach to shutting down a system if a critical temperature is reached. The simplicity of an electromechanical temperature switch is what makes this approach so desirable to designers, as they are passive devices which require no power, and will reliably change state at the specified set point.

    1. Flame Detection in Aircraft Engines.
    2. Plastics extruder barrel overtemp detection in plastics manufacturing.
    3. Brake overtemp indication in industrial vehicles and airplanes.
    4. Engine cooling fan control.
    5. Clutch overtemp in escalators.
    6. Bleed air overtemp indication on aircraft environmental control systems
    7. Window defrost temperature detection on advanced military vehicles.
    8. Over temperature detection for processing equipment in oil refinery process.
    9. Aircraft Avionics overtemp detection.
    10. Gas shut-off  flame detection on railroad switch de-icing application.

    Our expertise in designing and deploying custom thermal cutoff switches goes deep. Control Products, Inc. was founded in 1946 with a line of thermal switches for aerospace and industrial applications. Developing expertise in precise calibration of these devices over a broad temperature range, the company’s business expanded into many different industries, providing a diverse portfolio of experience.

    Thermal Cutoff Switch Product Line

    Currently CPI maintains three primary switch types in its product line:

    SnapStats (0°F – 300°F): Contact movement in the temp switch is achieved using a bimetallic snap disc. Snap action provides shock and vibration immunity and a broader differential. Set point range: 0°F-300°F (-17.8°C-148°C)

    PlugStats (0°F – 650°F): Contact movement is achieved via the different expansion rates of two metals fused together. This is a slow-make-and-break device, which provides very close tolerance temperature sensing, with a small differential. Set point range: 0°F-650F (-17.8°C-343°C)

    Rod & Tubes: (0°F – 1750°F): Contact movement in the switches is achieved via differences in coefficients of expansion of two materials, in this case the outer tube and the internal rod. This product offers very rapid response time and very high temperature sensing. Set point range: 0°F-1750°F (-18.3°C-954°C).

    For a detailed breakdown of our thermal switch line visit our Thermal Cutoff Switch Page.

    For more information about CPI visit our website at


  • CPI SL Cylinder and Accumulator Piston Sensor
    CPI's Hydraulic Cylinder and Accumulator Piston Position Sensors can be used inside of cylinders with no gun drilling required. One P/N can be used for many stroke lengths up to 50ft and with telescopic cylinders as well as single stage cylinders....

  • - Inputs available 5 to 28 VDC

    - All outputs available, Amperage, Voltage, CanBus etc.

    - Subsea capable upon request.

    - ATEX rated upon request. 

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