Instrumentation, Measurement and Control - ControlAir
Instrumentation refers to devices that measure or control physical variables such as temperature, level, flow, or pressure. These products are essential in the industry because they allow for maximum output with mi...
Categories from ControlAir (1)
Pressure Regulators
Pressure regulators reduce and hold downstream pressure for gases and liquids. Stable pressure protects equipment, improves process control and saves energy.
Regulator Types
- Air and gas regulators – pneumatic and process gases
- Liquid regulators – water and process liquids
- Back pressure regulators – maintain upstream pressure
- Precision regulators – instrument and analytical
- High-pressure regulators – cylinders and hydraulics
Choosing a Regulator
Select inlet and outlet pressure range, flow, media and materials. Oversizing causes poor control.
Centro supplies pressure regulators for industrial systems.
Related categories: Pressure Control | Sequence Valves | Pressure Transmitters | Pressure Switch | Gauges
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The ControlAir Type 410 is a high precision regulator designed to
provide reliable performance under variable operating conditions.
This quality unit is ideal as an economical alternative for control of
industrial process applications. The regulation characteristics of the
Type 410 have been proven to be superior to comparable
competitive units. Durable materials and corrosion resistant
construction provide reliable operation in harsh industrial
environments.
$117.99
Available for Purchase
Subject to factory lead times
The ControlAir Type 410 is a high precision regulator designed to
provide reliable performance under variable operating conditions.
This quality unit is ideal as an economical alternative for control of
industrial process applications. The regulation characteristics of the
Type 410 have been proven to be superior to comparable
competitive units. Durable materials and corrosion resistant
construction provide reliable operation in harsh industrial
environments.
$108.04
Available for Purchase
Subject to factory lead times
The ControlAir Type 410 is a high precision regulator designed to
provide reliable performance under variable operating conditions.
This quality unit is ideal as an economical alternative for control of
industrial process applications. The regulation characteristics of the
Type 410 have been proven to be superior to comparable
competitive units. Durable materials and corrosion resistant
construction provide reliable operation in harsh industrial
environments.
$117.99
Available for Purchase
Subject to factory lead times
The ControlAir Type 410 is a high precision regulator designed to
provide reliable performance under variable operating conditions.
This quality unit is ideal as an economical alternative for control of
industrial process applications. The regulation characteristics of the
Type 410 have been proven to be superior to comparable
competitive units. Durable materials and corrosion resistant
construction provide reliable operation in harsh industrial
environments.
$101.95
Available for Purchase
Subject to factory lead times
The CG330/CG340 series of compressed gas filter regulators are specifically engineered to deliver accurate pressure control while ensuring near-zero atmospheric leakage under steady-state or dynamic flow conditions. This makes them ideal for applications involving inert gases, natural gases, and other medias that must comply with strict fugitive emissions regulations. Constructed from durable, high-quality materials, these regulators are built to provide reliable, long-lasting performance in demanding industrial environments. The CG330/CG340 series is designed for critical applications where eliminating gas leakage is a regulatory necessity, ensuring operational efficiency and environmental safety.
$87.35
Available for Purchase
Subject to factory lead times
The ControlAir Type 410 is a high precision regulator designed to
provide reliable performance under variable operating conditions.
This quality unit is ideal as an economical alternative for control of
industrial process applications. The regulation characteristics of the
Type 410 have been proven to be superior to comparable
competitive units. Durable materials and corrosion resistant
construction provide reliable operation in harsh industrial
environments.
$101.95
Available for Purchase
Subject to factory lead times
The ControlAir Type 410 is a high precision regulator designed to
provide reliable performance under variable operating conditions.
This quality unit is ideal as an economical alternative for control of
industrial process applications. The regulation characteristics of the
Type 410 have been proven to be superior to comparable
competitive units. Durable materials and corrosion resistant
construction provide reliable operation in harsh industrial
environments.
$101.95
Available for Purchase
Subject to factory lead times
The ControlAir Type 410 is a high precision regulator designed to
provide reliable performance under variable operating conditions.
This quality unit is ideal as an economical alternative for control of
industrial process applications. The regulation characteristics of the
Type 410 have been proven to be superior to comparable
competitive units. Durable materials and corrosion resistant
construction provide reliable operation in harsh industrial
environments.
$108.04
Available for Purchase
Subject to factory lead times
The CG330/CG340 series of compressed gas filter regulators are specifically engineered to deliver accurate pressure control while ensuring near-zero atmospheric leakage under steady-state or dynamic flow conditions. This makes them ideal for applications involving inert gases, natural gases, and other medias that must comply with strict fugitive emissions regulations. Constructed from durable, high-quality materials, these regulators are built to provide reliable, long-lasting performance in demanding industrial environments. The CG330/CG340 series is designed for critical applications where eliminating gas leakage is a regulatory necessity, ensuring operational efficiency and environmental safety.
$151.04
Available for Purchase
Subject to factory lead times
The ControlAir Type 410 is a high precision regulator designed to
provide reliable performance under variable operating conditions.
This quality unit is ideal as an economical alternative for control of
industrial process applications. The regulation characteristics of the
Type 410 have been proven to be superior to comparable
competitive units. Durable materials and corrosion resistant
construction provide reliable operation in harsh industrial
environments.
$117.99
Available for Purchase
Subject to factory lead times
The ControlAir Type 410 is a high precision regulator designed to
provide reliable performance under variable operating conditions.
This quality unit is ideal as an economical alternative for control of
industrial process applications. The regulation characteristics of the
Type 410 have been proven to be superior to comparable
competitive units. Durable materials and corrosion resistant
construction provide reliable operation in harsh industrial
environments.
$108.04
Available for Purchase
Subject to factory lead times
The ControlAir Type 410 is a high precision regulator designed to
provide reliable performance under variable operating conditions.
This quality unit is ideal as an economical alternative for control of
industrial process applications. The regulation characteristics of the
Type 410 have been proven to be superior to comparable
competitive units. Durable materials and corrosion resistant
construction provide reliable operation in harsh industrial
environments.
$117.99
Available for Purchase
Subject to factory lead times
The ControlAir Type 410 is a high precision regulator designed to
provide reliable performance under variable operating conditions.
This quality unit is ideal as an economical alternative for control of
industrial process applications. The regulation characteristics of the
Type 410 have been proven to be superior to comparable
competitive units. Durable materials and corrosion resistant
construction provide reliable operation in harsh industrial
environments.
$101.95
Available for Purchase
Subject to factory lead times
The CG330/CG340 series of compressed gas filter regulators are specifically engineered to deliver accurate pressure control while ensuring near-zero atmospheric leakage under steady-state or dynamic flow conditions. This makes them ideal for applications involving inert gases, natural gases, and other medias that must comply with strict fugitive emissions regulations. Constructed from durable, high-quality materials, these regulators are built to provide reliable, long-lasting performance in demanding industrial environments. The CG330/CG340 series is designed for critical applications where eliminating gas leakage is a regulatory necessity, ensuring operational efficiency and environmental safety.
$87.35
Available for Purchase
Subject to factory lead times
The ControlAir Type 410 is a high precision regulator designed to
provide reliable performance under variable operating conditions.
This quality unit is ideal as an economical alternative for control of
industrial process applications. The regulation characteristics of the
Type 410 have been proven to be superior to comparable
competitive units. Durable materials and corrosion resistant
construction provide reliable operation in harsh industrial
environments.
$101.95
Available for Purchase
Subject to factory lead times
The ControlAir Type 410 is a high precision regulator designed to
provide reliable performance under variable operating conditions.
This quality unit is ideal as an economical alternative for control of
industrial process applications. The regulation characteristics of the
Type 410 have been proven to be superior to comparable
competitive units. Durable materials and corrosion resistant
construction provide reliable operation in harsh industrial
environments.
$101.95
Available for Purchase
Subject to factory lead times
The ControlAir Type 410 is a high precision regulator designed to
provide reliable performance under variable operating conditions.
This quality unit is ideal as an economical alternative for control of
industrial process applications. The regulation characteristics of the
Type 410 have been proven to be superior to comparable
competitive units. Durable materials and corrosion resistant
construction provide reliable operation in harsh industrial
environments.
$108.04
Available for Purchase
Subject to factory lead times
The CG330/CG340 series of compressed gas filter regulators are specifically engineered to deliver accurate pressure control while ensuring near-zero atmospheric leakage under steady-state or dynamic flow conditions. This makes them ideal for applications involving inert gases, natural gases, and other medias that must comply with strict fugitive emissions regulations. Constructed from durable, high-quality materials, these regulators are built to provide reliable, long-lasting performance in demanding industrial environments. The CG330/CG340 series is designed for critical applications where eliminating gas leakage is a regulatory necessity, ensuring operational efficiency and environmental safety.
$151.04
Available for Purchase
Subject to factory lead times
FAQS
- Selecting the right process instrument starts with defining four things: what variable you need to measure (temperature, pressure, flow, or level), the process conditions the instrument will face (media type, temperature range, pressure range, corrosiveness, and whether the environment is hazardous), the accuracy and response time your application requires, and how the measurement data needs to be communicated (local display only, 4–20 mA signal to a PLC/DCS, or digital protocol like HART or Modbus). For temperature, the choice between thermocouples, RTDs, and infrared sensors depends on the temperature range and accuracy needed. For pressure, gauge type, range, wetted materials, and whether you need local indication or a remote transmitter signal are the key decisions. For flow, the fluid properties (conductive liquid, gas, steam, slurry) determine whether a magnetic, ultrasonic, Coriolis, vortex, or variable-area meter is the best fit. For level, vessel conditions (open vs. pressurized, clean liquid vs. foam/solids) guide the choice between float switches, ultrasonic, radar, or differential pressure technologies. Centro's instrumentation specialists can help you match the right technology to your specific process conditions and budget.
- Accurate process instrumentation is the foundation of safe, efficient, and compliant operations. Every control loop — whether it manages boiler pressure, reactor temperature, tank level, or pipeline flow — depends on instruments that provide reliable, real-time measurements. If a temperature sensor reads inaccurately, a heater may overshoot and damage the product or create a safety hazard. If a level transmitter drifts, a tank may overflow or run dry. If a flow meter is undersized, the control system cannot maintain the correct feed rate. Beyond safety and quality, accurate instrumentation directly impacts energy consumption, raw material usage, and regulatory compliance. Calibrated, properly specified instruments reduce waste, prevent unplanned shutdowns, and provide the data required for regulatory reporting and quality documentation.
- A process control loop is a system that continuously measures a process variable, compares it to a desired setpoint, and adjusts an output to keep the variable at the setpoint. The loop consists of three elements: the sensor/transmitter (measures the variable — e.g., a thermocouple measuring temperature), the controller (compares the measurement to the setpoint and calculates a corrective output — typically a PID controller), and the final control element (adjusts the process — e.g., a control valve that opens or closes to change steam flow). Instruments are the eyes and ears of the loop — without accurate, responsive sensors and transmitters, the controller cannot make correct decisions, and the process drifts out of specification. The entire loop must be properly engineered as a system — sensor accuracy, transmitter range, controller tuning, and valve sizing must all be matched to the process requirements.
- Industrial instruments communicate with controllers and PLCs using standardized electrical signals. The 4–20 mA analog current loop is the most widely used signal in process instrumentation — it transmits a variable measurement as a proportional current (4 mA = zero/low range, 20 mA = full scale), and the current-based signal is resistant to voltage drop and electrical noise over long cable runs. The 0–10 V DC voltage signal is used in some HVAC and building automation applications but is more susceptible to noise and cable length limitations. Discrete (on/off) signals — from switches, relays, and transmitter alarm contacts — indicate threshold conditions like high level, low pressure, or flow/no-flow. Digital communication protocols — HART (layered on top of 4–20 mA for configuration and diagnostics), Foundation Fieldbus, PROFIBUS PA, and IO-Link — enable bidirectional communication between the instrument and the control system for advanced diagnostics, remote configuration, and multi-variable data.
- When instruments are installed in locations classified as hazardous (areas where flammable gases, vapors, or combustible dusts may be present), they must be approved for that classification to prevent ignition. Key considerations include the area classification (Class I for gases/vapors, Class II for dusts, with Division 1 for normally present hazards and Division 2 for abnormal conditions — or Zone 0/1/2 under ATEX/IECEx), the protection method (intrinsic safety, explosion-proof, non-incendive, or purged/pressurized), and the specific gas group and temperature class. Intrinsically safe (IS) instruments — used with IS barriers in the safe area — limit energy to levels too low to cause ignition and are the most common and practical approach for low-power sensors and transmitters. Explosion-proof enclosures contain any internal explosion and are used for higher-power devices. Always verify the instrument's certification (FM, CSA, ATEX, IECEx) matches the area classification before installation.