Instrumentation, Measurement and Control - Sensocon®
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 Sensocon® (3)
Differential Pressure Gauge Accessories
Differential pressure gauge accessories help DP gauges install safely and read accurately. Manifolds, mounting kits and tubing protect gauges and make maintenance easier.
Accessories Available
- 3-valve manifolds – isolate and equalize
- Mounting brackets – panel and pipe mounting
- Tubing and fittings – connect pressure ports
- Overpressure protection – protect sensitive elements
Choosing Accessories
Match connections and pressure ratings to the gauge and process. Always equalize before isolating to protect the gauge.
Centro supplies DP gauge accessories.
Related categories: Differential Pressure Gauges | Backflow Test Kits
Differential Pressure Gauges
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
Pressure Transmitters
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
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The Series 211 Differential Pressure Transmitter can accurately measure positive, negative, or differential pressure and send the corresponding 4-20 mA or 0-10 V output signal. The SERIES 211 Differential Pressure Transmitter is not position sensitive and can be mounted in any orientation without compromising accuracy. It also features a power LED, so you always know when the transmitter is operating. The compact, lightweight design makes installation simple and easy.
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The Series 212 Weather-Proof Differential Pressure Transmitter can accurately measure positive, negative, or differential pressure and send the corresponding 4-20 mA or 0-10 V output signal. The SERIES 212 Weather-Proof Differential Pressure Transmitter is designed with an IP 65 enclosure that can be easily mounted to any flat surface. The Series 212 is not position sensitive and can be mounted in any orientation without compromising accuracy. The compact, lightweight design makes installation simple and easy.
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The Series A1 Digital Differential Pressure Gauge is a patented microprocessor based digital pressure gage for positive, negative, and differential measurement designed to be a direct replacement for mechanical gauges. The Series A1 digital differential pressure gauges utilize an extremely stable piezoresistive sensing technology to give a standard full scale accuracy of 1%. For applications requiring better accuracy, the A1 is also available with 0.5% or 0.25% accuracy.
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The Series A2 digital differential pressure gauge is a patented microprocessor based digital pressure gage for positive, negative, and differential measurement designed to be a direct replacement for mechanical gauges. The Series A2 differential pressure gauges utilize an extremely stable piezoresistive sensing technology to give a standard full scale accuracy of 1%. For applications requiring better accuracy, the A2 is also available with 0.5% or 0.25% accuracy. The A2 digital differential pressure gauge also has an optional 4-20 mA output for applications requiring an output signal. The A2 features a bright ½" LED display and process arch, which gives the gauge improved readability and precision. The A2 digital differential pressure gauges also feature 5 user selectable engineering units including in. w.c., mm w.c., cm w.c., kPa, and Pa. The Series A2 offers an improved look, and performance compare to mechanical gauges.
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The Series A4 digital differential pressure control is a patented microprocessor based pressure controller for measuring positive, negative, and differential pressure as well as velocity and air flow. The Series A4 differential pressure controller includes (2) 8A SPDT relays and an optional digitally scalable 4-20 mA output. The programmable control allows full configuration of variables such as setpoints, dead band, engineering units, flow coefficients, and more. The programming is done from a user friendly menu on the OLED display. The OLED also displays the exact setpoints or other user defined variables during normal operation. Furthermore, the menu structure can be customized by moving variables to different menu levels to accommodate user preferences. Compared to other mechanical products, the Series A4 digital differential pressure controller has a significantly reduced depth, an improved look, and better performance.
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The Series S-5000 differential pressure gauge is a low-cost, diaphragm operated, mechanical pressure gauge in a miniature housing. The SERIES S-5000 gauge can be used in applications for measuring positive, negative, or differential pressure with an accuracy of 5% (Full Scale). Standard applications include monitoring filter status, duct static pressure, room pressure, fan or blower pressure, paint booths, dust collectors, and cabinet purging along with many other uses.
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The Series S2000 differential pressure gauge is a low-cost, diaphragm operated, mechanical pressure gauge. The SERIES S2000 gauge can be used in applications for measuring positive, negative, or differential pressure. Standard applications include monitoring filter status, duct static pressure, room pressure, fan or blower pressure, paint booths, dust collectors, and cabinet purging along with many other uses.
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The Series Sz-5000 differential pressure gauge is a low-cost, diaphragm operated, mechanical pressure gauge in a miniature housing with easy front access to the zero adjustment. The SERIES Sz-5000 gauge can be used in applications for measuring positive, negative, or differential pressure with an accuracy of 5% (Full Scale). Standard applications include monitoring filter status, duct static pressure, room pressure, fan or blower pressure, paint booths, dust collectors, and cabinet purging along with many other uses.
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The Series S2000 differential pressure gauge is a low-cost, diaphragm operated, mechanical pressure gauge. The SERIES S2000 gauge can be used in applications for measuring positive, negative, or differential pressure. Standard applications include monitoring filter status, duct static pressure, room pressure, fan or blower pressure, paint booths, dust collectors, and cabinet purging along with many other uses.
$81.51$85.00
Typically ships within 2-4 weeks
Subject to factory lead times
Cable Gland S2221 is a liquid tight PG-21 cable connector for 0.354-0.603" diameter cable. This is commonly used along with the A-101 Weatherproof Cover for Series A gauges and controls. (SERIES A)
$10.55$11.00
Typically ships within 1-2 weeks
Subject to factory lead times
1/4" OD Vinyl Tubing for use with S2000 barbed fittings. Sold as 5ft length. (SERIES S2000)
$10.55$11.00
Typically ships within 1-2 weeks
Subject to factory lead times
Weatherproof Cover / Surface Mount Bracket is an accessory for the Series A family of products. The Series A has been designed to meet NEMA 4X standards when installed with the Weatherproof Gauge Cover, included gasket, and appropriately connected with a 3/4" or PG-21 Cable Gland conduit connection. The Weatherproof Cover also allows any Series A gauge or control to be surface mounted with the included hardware. (SERIES A)
$19.18$20.00
Typically ships within 1-2 weeks
Subject to factory lead times
Hanging Bracket / Stand is an L-bracket with a hanging hole and a 3 hole bolt pattern. This bracket allows for mobile use of the S2000 differential pressure gauge. (SERIES S2000)
$14.39$15.00
Typically ships within 1-2 weeks
Subject to factory lead times
Surface Mounting Plate is an aluminum surface mounting bracket for the Series S2000. (SERIES S2000)
$9.59$10.00
Typically ships within 1-2 weeks
Subject to factory lead times
Air Filter Gauge Kit converts any S2000 into an air filter gauge. The kit includes an aluminum (A-103) surface mounting bracket with screws, (2) (A-131) brass static pressure tips, (2) (A-202/A-203) shut off valves and (2) (A-024) 5 ft lengths of 1/4" OD vinyl tubing. (SERIES S2000)
$40.28$42.00
Typically ships within 1-2 weeks
Subject to factory lead times
Brass Static Pressure Tip with Barbed Connection is a brass barbed static pressure tip for 3/16" and 1/8" ID tubing with a 1/8" NPT. This pressure tip comes with 2 washers and a nut. (SERIES S2000)
$10.55$11.00
Typically ships within 1-2 weeks
Subject to factory lead times
90° Rubber Fitting for 3/16" ID push on tubing. (SERIES A)
$4.80$5.00
Typically ships within 1-2 weeks
Subject to factory lead times
Short Shut Off Valve is a plastic shut off valve that has a short 1/4" length brass end with a 3/16" NPT connection and a second end with a push in connector for 1/4" (6mm) O.D. tubing. (SERIES S2000)
$15.35$16.00
Typically ships within 1-2 weeks
Subject to factory lead times
Long Shut Off Valve is a plastic shut off valve that has a long 1" length brass end with a 3/16" NPT connection and a second end with a push in connector for 1/4" (6mm) O.D. tubing. (SERIES S2000)
$15.35$16.00
Typically ships within 1-2 weeks
Subject to factory lead times
Patented microprocessor based digital differential pressure controller.
$618.47$645.00
Available for Purchase
Subject to factory lead times
Configure product to see pricing
The Series 211 Differential Pressure Transmitter can accurately measure positive, negative, or differential pressure and send the corresponding 4-20 mA or 0-10 V output signal. The SERIES 211 Differential Pressure Transmitter is not position sensitive and can be mounted in any orientation without compromising accuracy. It also features a power LED, so you always know when the transmitter is operating. The compact, lightweight design makes installation simple and easy.
Configure Product
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The Series 212 Weather-Proof Differential Pressure Transmitter can accurately measure positive, negative, or differential pressure and send the corresponding 4-20 mA or 0-10 V output signal. The SERIES 212 Weather-Proof Differential Pressure Transmitter is designed with an IP 65 enclosure that can be easily mounted to any flat surface. The Series 212 is not position sensitive and can be mounted in any orientation without compromising accuracy. The compact, lightweight design makes installation simple and easy.
Configure Product
Configure product to see pricing
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The Series A1 Digital Differential Pressure Gauge is a patented microprocessor based digital pressure gage for positive, negative, and differential measurement designed to be a direct replacement for mechanical gauges. The Series A1 digital differential pressure gauges utilize an extremely stable piezoresistive sensing technology to give a standard full scale accuracy of 1%. For applications requiring better accuracy, the A1 is also available with 0.5% or 0.25% accuracy.
Configure Product
Configure product to see pricing
Configure product to see pricing
The Series A2 digital differential pressure gauge is a patented microprocessor based digital pressure gage for positive, negative, and differential measurement designed to be a direct replacement for mechanical gauges. The Series A2 differential pressure gauges utilize an extremely stable piezoresistive sensing technology to give a standard full scale accuracy of 1%. For applications requiring better accuracy, the A2 is also available with 0.5% or 0.25% accuracy. The A2 digital differential pressure gauge also has an optional 4-20 mA output for applications requiring an output signal. The A2 features a bright ½" LED display and process arch, which gives the gauge improved readability and precision. The A2 digital differential pressure gauges also feature 5 user selectable engineering units including in. w.c., mm w.c., cm w.c., kPa, and Pa. The Series A2 offers an improved look, and performance compare to mechanical gauges.
Configure Product
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The Series A4 digital differential pressure control is a patented microprocessor based pressure controller for measuring positive, negative, and differential pressure as well as velocity and air flow. The Series A4 differential pressure controller includes (2) 8A SPDT relays and an optional digitally scalable 4-20 mA output. The programmable control allows full configuration of variables such as setpoints, dead band, engineering units, flow coefficients, and more. The programming is done from a user friendly menu on the OLED display. The OLED also displays the exact setpoints or other user defined variables during normal operation. Furthermore, the menu structure can be customized by moving variables to different menu levels to accommodate user preferences. Compared to other mechanical products, the Series A4 digital differential pressure controller has a significantly reduced depth, an improved look, and better performance.
Configure Product
Configure product to see pricing
The Series S-5000 differential pressure gauge is a low-cost, diaphragm operated, mechanical pressure gauge in a miniature housing. The SERIES S-5000 gauge can be used in applications for measuring positive, negative, or differential pressure with an accuracy of 5% (Full Scale). Standard applications include monitoring filter status, duct static pressure, room pressure, fan or blower pressure, paint booths, dust collectors, and cabinet purging along with many other uses.
Configure Product
Configure product to see pricing
The Series S2000 differential pressure gauge is a low-cost, diaphragm operated, mechanical pressure gauge. The SERIES S2000 gauge can be used in applications for measuring positive, negative, or differential pressure. Standard applications include monitoring filter status, duct static pressure, room pressure, fan or blower pressure, paint booths, dust collectors, and cabinet purging along with many other uses.
Configure Product
Configure product to see pricing
Configure product to see pricing
The Series Sz-5000 differential pressure gauge is a low-cost, diaphragm operated, mechanical pressure gauge in a miniature housing with easy front access to the zero adjustment. The SERIES Sz-5000 gauge can be used in applications for measuring positive, negative, or differential pressure with an accuracy of 5% (Full Scale). Standard applications include monitoring filter status, duct static pressure, room pressure, fan or blower pressure, paint booths, dust collectors, and cabinet purging along with many other uses.
Configure Product
Configure product to see pricing
The Series S2000 differential pressure gauge is a low-cost, diaphragm operated, mechanical pressure gauge. The SERIES S2000 gauge can be used in applications for measuring positive, negative, or differential pressure. Standard applications include monitoring filter status, duct static pressure, room pressure, fan or blower pressure, paint booths, dust collectors, and cabinet purging along with many other uses.
$81.51$85.00
Typically ships within 2-4 weeks
Subject to factory lead times
Cable Gland S2221 is a liquid tight PG-21 cable connector for 0.354-0.603" diameter cable. This is commonly used along with the A-101 Weatherproof Cover for Series A gauges and controls. (SERIES A)
$10.55$11.00
Typically ships within 1-2 weeks
Subject to factory lead times
1/4" OD Vinyl Tubing for use with S2000 barbed fittings. Sold as 5ft length. (SERIES S2000)
$10.55$11.00
Typically ships within 1-2 weeks
Subject to factory lead times
Weatherproof Cover / Surface Mount Bracket is an accessory for the Series A family of products. The Series A has been designed to meet NEMA 4X standards when installed with the Weatherproof Gauge Cover, included gasket, and appropriately connected with a 3/4" or PG-21 Cable Gland conduit connection. The Weatherproof Cover also allows any Series A gauge or control to be surface mounted with the included hardware. (SERIES A)
$19.18$20.00
Typically ships within 1-2 weeks
Subject to factory lead times
Hanging Bracket / Stand is an L-bracket with a hanging hole and a 3 hole bolt pattern. This bracket allows for mobile use of the S2000 differential pressure gauge. (SERIES S2000)
$14.39$15.00
Typically ships within 1-2 weeks
Subject to factory lead times
Surface Mounting Plate is an aluminum surface mounting bracket for the Series S2000. (SERIES S2000)
$9.59$10.00
Typically ships within 1-2 weeks
Subject to factory lead times
Air Filter Gauge Kit converts any S2000 into an air filter gauge. The kit includes an aluminum (A-103) surface mounting bracket with screws, (2) (A-131) brass static pressure tips, (2) (A-202/A-203) shut off valves and (2) (A-024) 5 ft lengths of 1/4" OD vinyl tubing. (SERIES S2000)
$40.28$42.00
Typically ships within 1-2 weeks
Subject to factory lead times
Brass Static Pressure Tip with Barbed Connection is a brass barbed static pressure tip for 3/16" and 1/8" ID tubing with a 1/8" NPT. This pressure tip comes with 2 washers and a nut. (SERIES S2000)
$10.55$11.00
Typically ships within 1-2 weeks
Subject to factory lead times
90° Rubber Fitting for 3/16" ID push on tubing. (SERIES A)
$4.80$5.00
Typically ships within 1-2 weeks
Subject to factory lead times
Short Shut Off Valve is a plastic shut off valve that has a short 1/4" length brass end with a 3/16" NPT connection and a second end with a push in connector for 1/4" (6mm) O.D. tubing. (SERIES S2000)
$15.35$16.00
Typically ships within 1-2 weeks
Subject to factory lead times
Long Shut Off Valve is a plastic shut off valve that has a long 1" length brass end with a 3/16" NPT connection and a second end with a push in connector for 1/4" (6mm) O.D. tubing. (SERIES S2000)
$15.35$16.00
Typically ships within 1-2 weeks
Subject to factory lead times
Patented microprocessor based digital differential pressure controller.
$618.47$645.00
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.