Instrumentation, Measurement & Control Division

Process controllers read signals from sensors and adjust outputs to hold temperature, pressure, flow or level at set point. They range from simple panel meters to advanced PID controllers.

Controller Products

• PID controllers – precise closed-loop control
• Process meters – display and alarm process signals
• Panel meters and displays – local indication

Choosing a Controller

Match inputs (thermocouple, RTD, mA, voltage) and outputs (relay, SSR, analog) to your process. Consider alarms, ramp/soak programming and communications. Panel size (1/16, 1/8, 1/4 DIN) affects layout.

Centro offers controllers and displays for process and temperature control.

Shop by type: Panel Meters and Displays | PID

Related categories: Instrumentation, Measurement and Control | Recorders | Pressure Control | Instrument/Compression Fittings | Flow Control

Flow meters measure the rate and total volume of liquids and gases moving through pipes and channels. Accurate flow data supports billing, batching, process control and efficiency improvements.

Flow Meter Types

• Magnetic flow meters – conductive liquids with no moving parts
• Turbine flow meters – clean, low-viscosity liquids
• Positive displacement meters – viscous fluids
• Thermal mass meters – gas flow
• Rotameters – simple visual indication
• Open channel and anemometer meters – water channels and airflow

Choosing a Flow Meter

The fluid, flow range, accuracy, pipe size and installation constraints decide the technology. Consider pressure drop, straight-run needs and output signals.

Centro can help you select flow meters for your fluid and application.

Shop by type: Anemometer Flow Meters | Magnetic Flow Meters | Turbine Flow Meters | Roto Meters | Thermal Flow Meters | Visual Flow Meters

Related categories: Flow Control | Flow Transmitters | Flow Sensors | Flow Switches | Flow Control Accessories

Compression fittings are used in a variety of industries for a multitude of applications. Compression fittings are most commonly used in applications where copper or brass tubing is inserted into the fitting. The ferrule then compresses the tubing, creating a watertight seal. Compression fittings can be found in everything from plumbing and refrigeration to automotive and aerospace applications. Our team is proud to offer a wide variety of compression fittings, ensuring that you'll find the perfect solution for your needs. Centro carries instrument and compression tube fittings in stainless steel and brass, along with tubing, valves and adapters to complete your instrument lines. Please browse our website to learn more about our products and services.

Related categories: Instrumentation, Measurement and Control | Sensors | Recorders | Analytical Tools | Controllers

Level control is essential for many industrial and commercial applications, ranging from simple water tanks to complex chemical processing systems. Industrial applications often require control to maintain safe and efficient operations. This can be accomplished through the use of float switches or differential pressure control. Float switches are devices used to measure the level of a liquid in a tank. They work by using a float that is attached to a switch. When the float rises or falls with the level of the liquid, the switch is activated. This can then be used to trigger an alarm or shut off a pump. Differential pressure control is another level control method that uses pressure sensors to measure the difference in pressure between two points. This can be used to determine the liquid level in a tank. Differential pressure control is often used in applications requiring precise level control. We carry a complete selection of level-control products to meet your needs. Our float switches are ideal for small-scale applications, while our radar and differential pressure control systems are designed for more demanding environments. We also offer load cells for use in weight-based level measurement. Whether you need a simple float switch or a sophisticated differential pressure system, we have your level control products.

Shop by type: Bulk Solids | Liquid Level

Related categories: Instrumentation, Measurement and Control | Temperature Measurement, Instrumentation and Control | Analytical Tools | PVF | Sensors

Pressure control products measure, monitor and regulate pressure in liquids, gases and steam. Accurate pressure control protects equipment and keeps processes stable.

Pressure Control Products

• Gauges – pressure, differential and specialty gauges
• Pressure transmitters and transducers – electronic monitoring
• Pressure switches – alarm and control set points
• Pressure regulators and sequence valves – control downstream pressure
• Accessories – snubbers, syphons, manifolds and gauge valves

Building a Measurement Point

Choose instrument range, accuracy and wetted materials, then add the right accessories, such as isolation valves and snubbers, for safe, accurate readings.

Centro supplies pressure control instruments and accessories from leading brands.

Shop by type: Pressure Transducers | Pressure Control Accessories | Gauges | Pressure Switch | Pressure Transmitters | Pressure Regulators | Sequence Valves

Related categories: Instrumentation, Measurement and Control | Controllers | Flow Control | Recorders | Seals and Accessories

Industrial sensors monitor humidity, gas, flame, moisture and dew point to protect people, products and equipment. They feed critical data to control and safety systems.

Sensor Categories

• Humidity sensors – HVAC and environmental control
• Gas detection sensors – toxic and combustible gases
• Flame detection sensors – burner and fire safety
• Moisture in oil sensors – lubrication and transformer monitoring
• Dew point sensors – compressed air and gas dryness

Choosing a Sensor

Define what you need to measure, the range, accuracy and output signal, plus environmental and hazardous area ratings. Plan for calibration and maintenance.

Centro supplies industrial sensors for monitoring and safety applications.

Shop by type: Humidity Sensors | Gas Detection Sensors | Moisture in Oil Sensors | Dew Point Sensors

Related categories: Instrumentation, Measurement and Control | Analytical Tools | Instrument/Compression Fittings | Level Control | Recorders

Swivel joints are crucial components used to connect pipes or hoses in a fluid system, allowing for rotation and movement in various directions. These versatile joints are commonly employed in industries like oil and gas, chemical processing, and firefighting, where flexible connections are essential to accommodate movement, vibration, and thermal expansion. Swivel joints provide a reliable solution for preventing hose or pipe kinks, reducing stress on equipment, and enabling smooth fluid transfer even in challenging environments. With different sizes, materials, and pressure ratings available, swivel joints offer the flexibility needed to meet specific application requirements and ensure efficient fluid handling.

Related categories: Instrumentation, Measurement and Control | Hydraulic Accessories | PVF | Temperature Measurement, Instrumentation and Control | Level Control

We carry a complete selection of temperature measurement, instrumentation, and control devices to suit any industrial or commercial application. For various reasons, temperature measurement, instrumentation, and Control products are critical to industrial systems. Thermocouples, for example, are used extensively in industry to measure temperatures in a wide range of applications. Temperature switches are used to control the temperature of a process or system. All three of these products are essential to properly functioning industrial systems. Whether you need a simple temperature gauge for an easy fix or a sophisticated control system for a large factory, we have the products and expertise to meet your needs. Thermocouples, temperature switches, thermometers, and transmitters are available online, and our knowledgeable staff is always on hand to answer any questions. So please browse our selection today and find the perfect solution for your temperature monitoring needs.

Shop by type: Heat Exchangers | Temperature Accessories | Thermometers | Thermocouples and RTDs | Temperature Switches | Temperature Controllers | Temperature Recording | Temperature Transmitters

Related categories: Instrumentation, Measurement and Control | PVF | Level Control | Swivel Joints | Analytical Tools

Instrumentation valves provide precise fluid control for measurement, sampling, and process control systems. Shop instrumentation solenoid valves for automated on/off switching in control loops, needle valves for fine flow adjustment in analyzer and transmitter installations, proportioning valves for electronically modulated flow control, and air-actuated valves for remote operation in process environments. Built-in materials like 316 stainless steel, brass, and PTFE, these small-bore instrumentation valves are designed for tight spaces, high pressures, and compatibility with gases, liquids, steam, and corrosive media. Browse our full selection of instrumentation valves below to find the right fit for your application, or contact us for sizing and selection assistance.

Related categories: Instrumentation, Measurement and Control | Seals and Accessories | Flow Control | Pressure Control | Controllers

Diaphragm seals are devices that seal pressure transmitters to prevent process fluid from coming into contact with the inner workings of the transmitter. Our diaphragm seals are made from high-quality rubber resistant to wear and tear. They are available in various sizes to fit most pressure transmitters. Centro supplies threaded, flanged, sanitary and in-line diaphragm seals, and can help you choose the right seal and fill fluid for your gauge or transmitter. In addition, we offer a wide range of accessories for diaphragm seals, including replacement diaphragms, o-rings, and mounting brackets. Whether you need a single diaphragm seal or a complete Diaphragm Seal kit, we have the products to keep your pressure transmitter working correctly.

Related categories: Seals | Seal Accessories | Isolation Rings | O-Rings