Instrumentation, Measurement and Control - WIKA

Industrial pressure gauges are built for the vibration, pulsation and rough handling found in plants, pump rooms and machinery. They give operators a dependable local reading of pressure in water, air, oil, steam and process lines.

Industrial Gauge Options

• Stainless steel cases – corrosion resistance and durability
• Liquid-filled gauges – dampen vibration and pulsation for steady readings
• Brass and stainless internals – match media compatibility
• Bottom and back connections – for line and panel mounting
• Dial sizes from 2" to 6" – readable at a distance

Selecting a Gauge

Choose a range so normal operating pressure sits in the middle of the dial, generally about twice the operating pressure. Use a liquid-filled gauge on pumps and compressors, and add a snubber for pressure spikes. Confirm the connection size and accuracy grade.

Centro carries industrial pressure gauges for plant, process and equipment applications.

Related categories: Pressure Gauges | Process Gauges | Commercial Gauges | Test Gauges | Differential Pressure Gauges

Process pressure gauges are built for chemical, petrochemical, refining and power plant service. Heavy-duty cases, stainless wetted parts and high accuracy give dependable readings in demanding environments.

Process Gauge Features

• Solid-front safety cases – operator protection
• 316 stainless steel internals – corrosive media
• Liquid filling – vibration and pulsation damping
• Accuracy to 0.5% – precise readings
• 4.5" and 6" dials – easy reading

Choosing a Process Gauge

Choose range, accuracy, connection and materials suited to the process. Add diaphragm seals for corrosive, viscous or high-temperature media.

Centro supplies process gauges and accessories for plant instrumentation.

Related categories: Pressure Gauges | Commercial Gauges | Industrial Gauges | Test Gauges | Differential Pressure Gauges

Pressure transmitters send accurate pressure readings to your control system over long distances. They're the standard instrument for process monitoring, control loops and safety systems.

Transmitter Types

• Gauge and absolute transmitters – line pressure measurement
• Differential pressure transmitters – flow, level and filter monitoring
• Smart transmitters – HART and digital communication
• Remote seal transmitters – hot, viscous or corrosive media
• Hazardous area models – explosion-proof and intrinsically safe

Choosing a Transmitter

Select range, accuracy, process connection and wetted materials. Consider output, display and approvals. Manifolds simplify installation and calibration.

Centro supplies pressure transmitters and manifolds for process measurement.

Related categories: Pressure Control | Pressure Regulators | Pressure Switch | Sequence Valves | Gauges

Commercial pressure gauges cover HVAC, plumbing, fire protection and general building services. They're economical, easy to read and available in many standard ranges.

Commercial Gauge Options

• Dry and liquid-filled gauges – general service
• Brass internals – water, air and oil
• Common dial sizes – 2" to 4"
• Bottom and back connections – line or panel mounting
• Fire protection gauges – sprinkler system ratings

Choosing a Gauge

Select a range about twice normal operating pressure, and match connection size and dial type. Liquid-filled gauges handle vibration from pumps.

Centro supplies commercial gauges for HVAC, plumbing and building systems.

Related categories: Pressure Gauges | Test Gauges | Process Gauges | Differential Pressure Gauges | Industrial Gauges

Pressure gauges are instruments used to measure the pressure of fluids or gases in various industrial, commercial, and residential applications. They visually indicate the pressure levels, allowing operators to monitor and control processes effectively. Pressure gauges consist of a dial or digital display with a needle or numeric readout representing the pressure measurement in units such as PSI (pounds per square inch) or kPa (kilopascals). They typically feature a Bourdon tube, diaphragm, or other sensing elements that convert the applied pressure into a mechanical displacement, which is then displayed on the gauge. Pressure gauges are available in different types, including analog and digital, with varying accuracy levels and pressure ranges to suit specific application requirements. They are commonly used in oil and gas, manufacturing, HVAC, and automotive industries, where pressure monitoring is critical for operational safety, system performance, and quality control. Pressure gauges provide valuable feedback for adjusting process parameters, detecting leaks or anomalies, and ensuring the optimal functioning of equipment and systems.

Shop by type: Industrial Gauges | Process Gauges | Commercial Gauges | Test Gauges | Differential Pressure Gauges | Digital Gauges

Related categories: Gauges | Gauge Parts & Accessories | Manometers | Tridicators

Differential pressure gauges measure the difference between two pressure points. They show filter loading, flow through orifices, level in pressurized tanks and pressure drop across equipment.

DP Gauge Options

• Diaphragm DP gauges – low differential ranges
• Piston DP gauges – high line pressures
• DP gauges with switches – alarms and control
• Backflow test kits – backflow preventer testing
• Accessories – manifolds and mounting kits

Choosing a DP Gauge

Specify differential range, maximum line pressure, wetted materials and connection. Use 3-valve manifolds to protect gauges during startup.

Centro supplies differential pressure gauges and accessories.

Shop by type: Backflow Test Kits | Differential Pressure Gauge Accessories

Related categories: Pressure Gauges | Digital Gauges | Test Gauges | Commercial Gauges | Process Gauges

Bimetal thermometers are widely used temperature measurement devices that employ a bimetallic strip to indicate temperature changes. These thermometers consist of two metal strips, typically made of different metals with different coefficients of thermal expansion, bonded together. The metals expand or contract at different rates as the temperature changes, causing the bimetallic strip to bend. This bending motion is then translated into a rotational movement displayed on a calibrated dial to indicate the temperature. Bimetal thermometers are known for their simplicity, durability, and cost-effectiveness. They are commonly used in various industries and applications requiring reliable temperature monitoring, such as HVAC systems, automotive, food processing, and industrial processes. Bimetal thermometers offer advantages such as wide temperature ranges, resistance to shock and vibration, and ease of installation. They are available in different sizes and configurations to suit specific application requirements. With their robust construction and accurate temperature indication, bimetal thermometers provide a reliable and cost-effective temperature measurement solution in various industrial and commercial settings.

Related categories: Thermometers | Industrial Thermometers

Differential pressure liquid control products are essential components used in various applications to monitor and control the pressure difference between two points in a liquid system. These products are designed to measure the pressure drop across filters, pumps, valves, or other flow control devices. They are crucial in maintaining proper flow rates, preventing system damage, and ensuring optimal performance. Differential pressure liquid control products typically consist of a differential pressure transmitter or sensor, a flow element (such as an orifice plate, venturi tube, or flow nozzle), and associated piping and instrumentation. The transmitter or sensor detects the pressure difference and converts it into a proportional electrical signal, which can be used for monitoring, control, or alarm. These control products find applications in oil and gas, chemical processing, water and wastewater treatment, and HVAC systems. They help optimize system efficiency, improve process control, and ensure liquid systems' safe and reliable operation by providing accurate and real-time differential pressure measurements.

Related categories: Liquid Level | Level Switches | Radar | Level Sensors | Float Switch

Thermowells protect temperature sensors from pressure, flow, corrosion and abrasion. They also let you remove sensors for replacement or calibration without draining or shutting down the process.

Thermowell Types

• Threaded thermowells – common for general service
• Socket weld and weld-in – high-pressure installations
• Flanged thermowells – easy removal and corrosive service
• Sanitary thermowells – tri-clamp for food and pharma
• Tapered and stepped stems – strength and fast response

Choosing a Thermowell

Select material, insertion length, bore size and connection. For high-velocity flows, perform a wake frequency calculation to avoid stem failure.

Centro supplies thermowells for temperature sensors and thermometers.

Related categories: Temperature Measurement, Instrumentation and Control | Temperature Regulators | Temperature Transmitters | Temperature Sensors | Temperature Recording

Liquid level sensors detect or measure liquid in tanks and containers. They support pump control, inventory tracking and overfill protection.

Sensor Types

• Ultrasonic sensors – non-contact continuous level
• Capacitive sensors – point and continuous level
• Optical sensors – compact point detection
• Submersible pressure sensors – hydrostatic level
• Float sensors – simple, dependable

Choosing a Sensor

Consider liquid type, tank size, mounting and the output you need. Foam, vapor and buildup affect some technologies.

Centro supplies liquid level sensors.

Related categories: Liquid Level | Water Gauges | Level Switches | Differential Pressure Control | Radar

Pressure snubbers smooth out pressure spikes and pulsations before they reach gauges, switches and transmitters. Damping the surges gives steadier readings and helps instruments last longer, especially near pumps, compressors and quick-closing valves.

Snubber Types

• Porous metal disc snubbers – sintered elements for gases and light liquids
• Piston snubbers – self-cleaning action for dirtier fluids
• Adjustable snubbers – tune the damping to your system
• Brass and stainless steel – match media compatibility

Choosing a Snubber

Select the element grade based on fluid viscosity: finer discs for air and water, coarser for oils. Match thread sizes to your gauge and process connection. For very severe pulsation, combine a snubber with a liquid-filled gauge.

Centro carries pressure snubbers and gauge accessories to protect your instruments.

Related categories: Pressure Control Accessories | Manifold Valves | Gauge Cock Valve | Instrument Valve | Syphons

Pressure control accessories protect instruments, simplify maintenance and make pressure measurements more accurate. Syphons, snubbers, manifolds and valves are essential to a dependable gauge or transmitter installation.

Accessories Available

• Pressure snubbers – dampen pulsation and spikes
• Syphons – protect gauges from live steam
• Manifold valves – isolate and equalize transmitters
• Gauge cock and instrument valves – isolate instruments for service
• PT plugs – quick test ports for pressure and temperature checks

Building an Installation

A typical gauge installation includes an isolation valve, a protection device (snubber or syphon) and the gauge itself. Choose materials compatible with the media and pressure ratings above system maximum.

Centro carries pressure control accessories to complete and protect your instrument installations.

Shop by type: Pressure Snubber | Manifold Valves | Gauge Cock Valve | Instrument Valve | Syphons | Instrument Valve Accessories | PT Plugs

Related categories: Pressure Control | Gauges | Pressure Transducers | Pressure Switch | Pressure Transmitters

Needle valves give fine, repeatable control of low flows in instrument lines, sampling systems and gauge isolation. A slender, tapered stem seats into a matching orifice, so a few turns of the handle let you dial in precise flow or shut it off completely.

Needle Valve Options

• Straight and angle patterns – suit your piping layout
• Hard-seat and soft-seat designs – metal seats for high temperature, PTFE or PEEK for bubble-tight shutoff
• Bar stock and forged bodies – in 316 stainless steel, brass and carbon steel
• NPT, tube and socket weld ends – connect directly to tubing or pipe
• High-pressure models – rated to 6,000 psi and beyond

Selecting a Needle Valve

Consider the pressure and temperature rating, the flow coefficient (Cv) you need, and the media's compatibility with the body and packing. Choose regulating stems for throttling and standard stems for isolation. Panel-mount options and lockable handles are available for instrument panels.

Centro carries instrumentation needle valves in a wide range of sizes and materials for process, hydraulic and analytical systems.

When it comes to instrumentation systems, precision and reliability are key. Pipes, valves, and fittings (PVF) are critical in maintaining accurate measurements, controlling pressure, and ensuring smooth operation in industrial processes. Stauff PVF products are designed to handle high pressures, temperature fluctuations, and corrosive environments, making them ideal for industries like oil and gas, chemical processing, power generation, and manufacturing.

What Stauff PVF Products Do We Offer?

We provide a full range of Stauff PVF components built for instrumentation applications, including:

• Instrumentation tubing – High-quality stainless steel tubing for precise fluid and gas control.
• Needle valves – Allow for fine adjustments and accurate flow regulation.
• Ball valves – Provide quick on/off control for efficient system management.
• Check valves – Prevent backflow and protect sensitive instrumentation.
• Tube fittings and adapters – Available in various configurations to ensure leak-free connections.
• Manifold valves – Streamline pressure control and system isolation in complex setups.

Why Choose Stauff PVF Products?

• Precision-engineered for demanding applications.
• Corrosion-resistant materials ensure durability in harsh environments.
• Leak-free performance keeps systems running efficiently.
• Wide compatibility with different instrumentation setups.

Find the Right PVF Solution

Whether you're setting up a new instrumentation system or upgrading existing components, Stauff PVF products offer the reliability and performance you need. Browse our selection online or reach out to our team for expert guidance in choosing the right components for your application.

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

We offer pressure gauges, vital instruments that measure and indicate fluid or gas pressure within a system. These gauges are commonly employed in various industries, including manufacturing, oil and gas, automotive, and HVAC systems. Pressure gauges consist of a dial or digital display that shows the pressure reading and a sensing element that detects the pressure and converts it into a readable form. They come in different types, such as Bourdon tube gauges, diaphragm gauges, and digital pressure gauges, each suited for specific applications and pressure ranges. Pressure gauges provide crucial information for monitoring and controlling processes, ensuring optimal performance and safety. They enable operators to gauge system pressure levels, detect abnormalities, and make informed decisions regarding system adjustments or maintenance. Pressure gauges may also incorporate features such as maximum pressure indicators, adjustable pointers, or alarms for added functionality. With their accuracy, reliability, and ease of use, pressure gauges are crucial in maintaining operational efficiency and safety in various industries.

Shop by type: Boiler Gauges | Manometers | Pressure Gauges | Gauge Parts & Accessories | Tridicators

Related categories: Pressure Control | Pressure Switch | Pressure Control Accessories | Pressure Transmitters | Pressure Transducers

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

Instrument manifold valves mount between process piping and pressure or differential pressure transmitters. A manifold lets technicians isolate, equalize, vent and calibrate instruments without shutting down the process.

Manifold Types

• 2-valve manifolds – isolate and vent gauge and pressure transmitters
• 3-valve manifolds – isolate and equalize DP transmitters
• 5-valve manifolds – add vent and calibration ports for DP service
• Direct-mount and remote-mount – fit your transmitter installation
• Stainless and alloy bodies – for corrosive and high-pressure service

Choosing a Manifold

Match the manifold to the transmitter type and connection (flanged or NPT), and the process pressure and temperature. Choose hard or soft seats according to temperature and leak-tightness requirements. Integrated manifolds save space and leak points.

Centro supplies instrument manifold valves for pressure and DP transmitter installations.

Related categories: Pressure Control Accessories | Gauge Cock Valve | Pressure Snubber | Instrument Valve | Syphons

Gauge cock valves isolate pressure gauges, switches and transmitters from the process so they can be removed, replaced or calibrated without shutting down the line. They're a small, inexpensive part that saves a lot of time.

Gauge Cock Options

• Tee handle and lever handle – quick quarter-turn operation
• Brass, carbon steel and stainless – match media and environment
• Male and female NPT connections – fit common gauge installations
• Bleed and vent options – safely relieve trapped pressure
• Needle-style gauge valves – higher pressure service

Choosing a Valve

Select the material, pressure rating and connection size for your gauge and process. On steam, use a syphon between the gauge cock and gauge. Bleed valves make gauge removal safer.

Centro carries gauge cock valves and pressure accessories for instrument installations.

Related categories: Pressure Control Accessories | Instrument Valve | Manifold Valves | Syphons | Pressure Snubber

A syphon is a simple yet effective tube-shaped device that consists of two legs bent in a U-shape. The purpose of the syphon is to transfer liquid from a higher container or location to a lower one without the need for any external pumping or suction. One leg of the syphon is inserted into the higher container or source of liquid, while the other leg is placed into the lower container. The liquid in the higher container initially fills the syphon's legs, creating a continuous flow due to the difference in pressure between the two ends. Gravity then causes the liquid to flow through the syphon, moving from the higher to the lower container. Syphons are commonly used in various applications, including laboratory experiments, aquariums, irrigation systems, and fluid transfers in industrial processes. They provide a simple and efficient means of transferring liquids over a vertical or horizontal distance without the need for complex pumps or mechanical devices.

Related categories: Pressure Control Accessories | Instrument Valve Accessories | Instrument Valve | PT Plugs | Gauge Cock Valve

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

Instrument valve accessories complete instrument installations with handles, mounting brackets, plugs, caps and fittings that keep valves secure and serviceable.

Accessories Available

• Replacement handles – standard and color-coded
• Mounting brackets – panel and pipe mounting
• Plugs and caps – seal unused ports
• Locking devices – prevent unauthorized operation
• Fittings and adapters – connect tubing and pipe

Choosing Accessories

Match accessories to your valve series and connection types. Color-coded handles help identify functions.

Centro supplies instrument valve accessories.

Related categories: Pressure Control Accessories | PT Plugs | Syphons | Instrument Valve | Gauge Cock Valve