KNOWLEDGE SECTION

Pressure measurements

Pressure instrument mounted on an isolator assembly

Safely Removing Pressure Instruments from Isolators

Learn why removing a pressure instrument from an isolator can disturb fill fluid, calibration, and process safety, plus safer service options.

Mechanical pressure switch illustrating deadband between trip and reset points

Pressure Switch Deadband and Hysteresis Explained

Learn how pressure switch deadband and hysteresis define trip and reset points, prevent chatter, and depend on mechanical switch design.

Sanitary pressure gauge on a hygienic process connection

Key Considerations for Selecting a Sanitary Pressure Gauge

Learn how to select a sanitary pressure gauge for hygienic processes, including materials, diaphragm design, cleanability, compliance, and connections.

Pressure sensor being checked with calibration equipment

Zero and Span Adjustability in Pressure Sensors: Benefits and Limits

Learn how zero and span adjustment corrects pressure sensor endpoint drift, when it helps accuracy, and why multi-point calibration may still be needed.

Microswitch inside a mechanical pressure switch assembly

How to Choose a Microswitch for a Pressure Switch Application

Learn how to choose a pressure switch microswitch by contact form, electrical rating, deadband, reset behavior, environment, and contact material.

Sanitary pressure gauge connected to process piping for cleaning and sterilization

CIP, SIP, and Autoclaving for Pressure Gauge Cleaning and Sterilization

Learn how CIP, SIP, and autoclaving apply to pressure gauge cleaning, sterilization, hygienic design, and instrument compatibility.

Bourdon tube pressure gauge sensing element and dial mechanism

Bourdon Tube Construction Types and Performance Requirements

Learn how Bourdon tube construction types, materials, fatigue resistance, and geometry affect pressure gauge reliability and performance.

Pressure switch used in a safety-related pressure measurement loop

SIL Certification for Pressure Switches: What It Means and When It Matters

Learn what SIL certification means for pressure switches, how it relates to safety functions, and when SIL-capable devices should be specified.

Pressure instruments used in pharmaceutical and biotech process systems

Pressure Measurement Instruments for Pharmaceutical and Biotech Processes

Learn how pressure gauges, transducers and differential sensors support hygienic processing, containment, calibration and validation in pharma and biotech.

Mechanical pressure gauge with built-in overpressure protection

Pressure Gauges with Built-In Overpressure Protection

Learn how pressure gauges with built-in overpressure protection limit Bourdon tube motion during surges and where rugged or stainless designs fit.

Pressure transducer diaphragm exposed to hydrogen service conditions

Hydrogen Permeation and Embrittlement in Pressure Transducers

Learn how hydrogen permeation and embrittlement affect pressure transducers, including wetted materials, diaphragm barriers, pressure range, and design factors.

Differential pressure gauge installed on industrial process piping

Differential Pressure Gauge Comparison for Industrial Applications

Compare differential pressure gauges for industrial service, including ranges, static pressure, materials, accuracy, approvals, and applications.

Pressure gauge dial showing zero indication and pointer stop area

Zero Box vs. Dial Pin on Pressure Gauges: Why Zero Indication Matters

Learn how a zero box differs from a dial pin on pressure gauges and why free zero indication helps reveal pointer offset or damage.

Solid-front and open-front pressure gauge case designs

Solid-Front vs. Open-Front Pressure Gauges: Case Design and Safety Behavior

Learn how solid-front and open-front pressure gauge cases differ in rupture behavior, rear venting, and suitability for hazardous service.

Pressure gauge and instrumentation on ammonia plant piping

Selecting Pressure Instruments for Ammonia Plant Applications

Learn how to select ammonia plant pressure instruments for material compatibility, temperature isolation, vibration control and overpressure protection.

Low-pressure gauge assembly with diaphragm seal and process connection

Selecting Instrument Assemblies for Low-Pressure Measurement

Learn how pressure range, instrument type, diaphragm seals, fill fluids and materials affect low-pressure instrument assembly selection.

Pressure transducer with an electrical connector and cable

Selecting Electrical Connections for Pressure Transducers

Learn how to select pressure transducer electrical connections based on output type, sealing, wiring, vibration, service needs, and hazardous locations.

Pressure gauges stored in protective packaging on a shelf

How to Store Pressure Gauges for Accurate, Reliable Readings

Learn how pressure gauge storage conditions, packaging, handling, and recalibration checks help protect accuracy before installation.

Pressure sensor installed on a data center liquid cooling loop

How to Select Pressure Sensors for Data Center Liquid Cooling Systems

Learn how pressure sensors support data center liquid cooling by monitoring pumps, pressure drops, leaks, restrictions and coolant compatibility.

HVAC pressure sensor installed for air or fluid pressure measurement

How to Evaluate HVAC Pressure Sensor Accuracy

Learn how temperature, vibration, installation, drift, and error definitions affect HVAC pressure sensor accuracy in real applications.

Pressure sensor installed on industrial process piping

How to Choose the Right Pressure Sensor: Five Technical Factors

Learn how wetted materials, hydraulic shock, pressure reference, accuracy definitions, and interchangeability affect pressure sensor selection.

Analog pressure gauge with reference and telltale pointer options

How to Choose the Right Pointer Type for a Pressure Gauge

Learn how fixed set hands, adjustable references, telltale pointers, and electrical contacts support pressure gauge monitoring tasks.

Pressure instrument process connections on piping and equipment

How to Choose Process Connections for Pressure Measurement Applications

Learn how to choose process connections for pressure instruments based on thread type, sealing method, media, pressure, vibration and maintenance needs.

Low-pressure transducer connected to pressure tubing

Does Pressure Tubing Length Affect Low-Pressure Transducer Readings?

Learn how pressure tubing length affects low-pressure transducer readings, including steady accuracy, response delay, and setup practices.

Pressure instrument connected to cryogenic piping

Cryogenic Pressure Measurement for Low-Temperature Systems

Learn how cryogenic pressure measurement uses material selection, thermal isolation, capillary lines, and coiled siphons to protect instruments.

Damaged pressure gauge being evaluated for repair or replacement

Can Pressure Gauges Be Repaired Safely?

Learn why pressure gauge repair is often discouraged, what risks affect safety and accuracy, and when replacement or qualified service is preferred.

Pressure gauge pointer positioned near the middle of the dial

Why Pressure Gauge Pointers Should Operate Near Mid-Scale

Learn why pressure gauge pointers are often best kept near mid-scale for clearer readings, lower mechanical stress, and better range selection.

Flush-mounted sanitary pressure gauge on process piping

Why Flush Connections Matter in Sanitary Pressure Measurement

Learn how flush connections reduce recessed pockets, improve cleanability, and support reliable pressure measurement in sanitary piping.

Saddle diaphragm seal installed on a process pipe for pressure measurement

When to Use a Saddle Seal in Process Pressure Measurement

Learn when saddle seals are used for process pressure measurement in large, dirty, viscous, corrosive, or high-temperature piping services.

Low-pressure gauge and pressure instrumentation components

What Low Pressure Means in Pressure Instrumentation

Learn how low pressure is defined and measured with gauges, differential pressure instruments, switches, and transducers in air and process systems.

Technician using a test gauge to verify pressure measurement

What Is a Test Gauge? When to Use One for Pressure Verification

Learn what a test gauge is, how it differs from a working gauge, and when to use one for pressure calibration, verification, and troubleshooting.

Pressure gauge installed on petrochemical process piping

Reducing Severe-Service Effects on Pressure Gauges in Petrochemical Processes

Learn how vibration, pulsation, overpressure, heat, and moisture affect refinery pressure gauges and how targeted protection improves reliability.

Technician calibrating a pressure transducer with test equipment

Pressure Transducer Calibration Methods and Adjustments

Learn how pressure transducer calibration uses reference standards, zero and span adjustments, deadweight testers, and safe field procedures.

Pressure transducer mounted on a process line exposed to changing media temperature

Media Temperature Effects on Pressure Transducer Performance

Learn how process media temperature affects pressure transducer accuracy, compensation, reliability, and installation choices such as capillaries and seals.

Pressure transducer installed on an ammonia refrigeration system

How to Select a Pressure Transducer for Ammonia Refrigeration Systems

Learn how to select a pressure transducer for ammonia refrigeration by evaluating wetted materials, pressure range, accuracy, connections, and approvals.

Pressure instrument assembly with mixed-metal process connections

How Material Compatibility Affects Pressure Instrument Replacement

Learn how material compatibility, galvanic corrosion, and mixed-metal assemblies affect pressure gauge and transmitter replacement decisions.

Diaphragm seal assembly connected to a pressure instrument

Diaphragm Seal Assembly Certifications and Documentation

Learn how diaphragm seal assembly certifications cover conformance, calibration, pressure integrity, leak testing, and material traceability.

Mechanical pressure gauge dial used to illustrate accuracy grades

ASME Accuracy Grades for Mechanical Pressure Gauges Explained

Learn how ASME accuracy grades define allowable error for mechanical pressure gauges and how grades affect range selection, calibration, and use.

Pressure transducer installed on a negative-pressure system

Selecting a Pressure Transducer for Negative Pressure Systems

Learn how to choose a pressure transducer for negative pressure by comparing vacuum, compound, absolute, and differential sensor options.

Low-pressure diaphragm gauge used for pressure measurement

Selecting a Low-Pressure Diaphragm Gauge for Accurate Readings

Learn how to select a low-pressure diaphragm gauge by range, overpressure protection, wetted materials, connection, pulsation, and environment.

Pressure transmitter installed on industrial process piping

Safe Installation Practices for Pressure Transmitters and Transducers

Learn what to check before installing pressure transmitters and transducers, including range, media compatibility, outputs, approvals, placement, and sealing.

Pressure instruments with environmental compliance documentation

RoHS, REACH, and Environmental Compliance for Pressure Instruments

Learn how RoHS, REACH, Prop 65, SDWA, and conflict minerals rules affect pressure gauges, transmitters, switches, and documentation.

Piston and diaphragm pressure switch actuator comparison

Piston vs. Diaphragm Pressure Switch Actuators: How to Choose

Compare piston and diaphragm pressure switch actuators by pressure range, sensitivity, durability, media compatibility, and application fit.

Sanitary pressure instrumentation installed on food processing equipment

NSF, 3-A and FDA Requirements for Food and Beverage Pressure Instrumentation

Learn how FDA expectations, NSF potable water certification and 3-A sanitary standards affect pressure gauges, sensors and seals in food plants.

Hydraulic pressure transducer connected to hydraulic equipment

Key Features That Make Hydraulic Pressure Transducers Reliable

Learn how pressure spikes, cycling, accuracy, vibration, temperature, materials and signal quality affect hydraulic pressure transducer reliability.

Mechanical pressure gauge installed on process piping

Improving Pressure Gauge Reliability in Severe Process Service

Learn how field surveys, range selection, damping, material compatibility, and temperature protection improve pressure gauge reliability.

Differential pressure sensor for data center cooling control

Improving Low Differential Pressure Accuracy for Data Center Cooling Control

Learn how range selection, zero stability, in-place calibration, and local display features affect low differential pressure sensing in data center cooling.

Pressure switch installed on a hydraulic manifold

How to Select Pressure Switches for Hydraulic Systems

Learn how pressure spikes, pulsation, vibration, enclosure ratings, and operating range affect pressure switch selection for hydraulic systems.

Pressure gauge installed on brewery process piping

How to Select Pressure Gauges for Brewery Applications

Learn how to choose brewery pressure gauges for product contact, utilities, pressure range, temperature, sanitary connections and pulsation.

Technician inspecting pressure gauges during a plantwide instrument audit

How a Plantwide Instrument Audit Reveals Gauge Performance Gaps

Learn how a plantwide instrument audit identifies damaged gauges, severe-service locations, poor ranges, and inventory standardization needs.

Pressure gauge connected to tubing on mobile hydrogen equipment

High-Pressure Instrumentation for Reliable Mobile Hydrogen Systems

Learn how high-pressure gauges are configured for mobile hydrogen systems, including vibration control, connection design, calibration, and testing.

Pressure sensor installed in a hazardous industrial process area

Hazardous Location Certifications for Pressure Sensors

Learn how hazardous-location certifications apply to pressure sensors, including protection methods, regional approvals, and selection factors.

Differential pressure transducer monitoring cooling airflow in a large-scale printer

Differential Pressure Monitoring for Large-Scale Printer Cooling

Learn how differential pressure monitoring verifies cooling airflow in large-scale printers and supports OEM production planning.

Pressure gauge assembly on a water treatment pump system

Diagnosing Premature Pressure Gauge Failure in Water Treatment Pump Systems

Learn how transient overpressure in water treatment pump systems can cause pressure gauges to lose zero and how limiting valves help protect instruments.

Industrial pressure gauges for general-service and harsh-duty applications

Comparing Industrial Pressure Gauges for General Service and Harsh Applications

Compare general-service and harsh-duty pressure gauges, including movement design, dampening, materials, vibration, pulsation and selection factors.

Oil pressure gauge monitoring engine lubrication pressure

What Is an Oil Pressure Gauge?

Learn how an oil pressure gauge monitors engine lubrication pressure, typical PSI behavior, warning signs, causes, and safe response.

Analog and digital pressure gauges used for industrial pressure measurement

Types of Pressure Gauges and How to Choose the Right One

Learn how Bourdon tube, diaphragm, capsule, differential, dry, liquid-filled, analog, and digital pressure gauges differ and where each fits.

High-pressure processing vessel and pressure instruments for juice pasteurization

Pressure Control for High-Pressure Pasteurization of Juice

Learn how pressure is generated, measured, held, and released in HPP juice pasteurization, including common faults and instrument checks.

Pressure gauge mounted on a swimming pool filter

Pool Filter Pressure Gauge PSI: Normal Readings, Troubleshooting, and Replacement

Learn normal pool filter pressure gauge readings, how to set a clean-filter baseline, diagnose high or low PSI, and replace a faulty gauge.

Technician testing a pressure transmitter with a hand pump and meter

How to Test a Pressure Transmitter

Learn how to test a pressure transmitter by isolating it safely, applying known pressures, measuring 4–20 mA output, and checking tolerance.

Tire pressure gauge attached to a vehicle tire valve stem

How to Read a Tire Pressure Gauge Correctly

Learn how to seal a tire gauge on the valve, read stick-style PSI markings, and compare the result with the vehicle pressure placard.

Stick tire pressure gauge measuring a tire valve stem

How to Read a Stick Tire Pressure Gauge

Learn how to seat a stick tire pressure gauge, read the sliding PSI scale, and compare the result with the vehicle placard.

Oil pressure gauge installation with sender and sandwich adapter

How to Install an Oil Pressure Gauge

Learn how to install an oil pressure gauge with a sandwich adapter, route wiring or tubing, connect power and signal, and check for leaks.

Pressure gauge connected to a calibration reference

How to Calibrate a Pressure Gauge

Learn how pressure gauge calibration works, including reference standards, multi-point checks, adjustment, rechecking, and calibration records.

Diagram comparing absolute, gauge, and atmospheric pressure references

Absolute Pressure vs. Gauge Pressure

Learn how absolute and gauge pressure differ, how atmospheric pressure links them, and when each reference is used in measurements.

Dashboard tire pressure warning light with a tire pressure gauge

How to Reset a Tire Pressure Warning Light

Learn how to reset a tire pressure light after checking tire pressures, using TPMS buttons or menus, driving recalibration, and battery power cycling.

Oil pressure gauge showing engine lubrication pressure

How to Read an Oil Pressure Gauge

Learn how oil pressure gauge readings change with RPM, temperature, and load, including normal PSI ranges and warning signs to stop the engine.

Digital micron gauge connected for vacuum pressure measurement

How to Measure Vacuum Pressure Accurately

Learn how to measure vacuum pressure by choosing the right gauge, placing it correctly, and interpreting deep-vacuum readings.

Explosion-proof pressure gauge for hazardous-area pressure measurement

Explosion-Proof Pressure Gauge Selection and Safety Practices

Learn how to select explosion-proof pressure gauges for hazardous areas, including certification, materials, damping, installation, and inspection.

Pressure gauge indicating pressure below atmospheric pressure

Can Gauge Pressure Be Negative?

Learn why gauge pressure can be negative, how it differs from absolute pressure, and where suction or partial vacuum readings appear in real systems.

Where Should an Oil Pressure Gauge Read?

Learn how to interpret oil pressure gauge readings by RPM, temperature, idle conditions, and low or high pressure warning ranges.

Oil pressure gauge showing engine idle pressure

Where Should an Oil Pressure Gauge Read at Idle?

Learn what an oil pressure gauge should show at hot idle, why pressure drops when oil warms, and when low PSI requires shutdown and diagnosis.

Dual-gauge gas regulator showing inlet and outlet pressure gauges

What the Two Pressure Gauges on a Regulator Show

Learn how high-pressure and low-pressure regulator gauges differ, what each reading means, and how to identify them by position and dial range.

Pressure gauge mounted on a pool filter system

What Should a Pool Filter Pressure Gauge Read?

Learn how to read a pool filter pressure gauge, set a clean baseline, and recognize high, low, or near-zero readings that need service.

Supply pressure gauge installed upstream of a regulator

What Is a Supply Pressure Gauge Used For?

Learn how a supply pressure gauge monitors upstream pressure, indicates remaining source pressure, and helps troubleshoot inlet-side faults.

Tire pressure gauge pressed onto a vehicle tire valve stem

How to Use a Tire Pressure Gauge for Accurate Readings

Learn how to find the recommended PSI, seat a tire pressure gauge correctly, read pencil-style gauges, and adjust tire pressure.

Mechanical test gauge connected to an engine oil pressure port

How to Test an Oil Pressure Gauge

Learn how to test an oil pressure gauge with a mechanical gauge, circuit checks, and sender resistance tests to separate real pressure faults from gauge issues.

Manifold pressure gauges connected to an air conditioning system

How to Read an AC Pressure Gauge

Learn how low-side and high-side AC gauge readings relate to refrigerant type, ambient temperature, and common pressure fault patterns.

Tire pressure gauge connected to a vehicle tire valve stem

How to Read a Gas Station Tire Pressure Gauge

Learn how to read pen-style, digital, and dial tire pressure gauges at a gas station and adjust tire PSI to the vehicle placard value.

Mechanical oil pressure gauge with oil line and fittings

How to Install a Mechanical Oil Pressure Gauge Safely

Learn how to install a mechanical oil pressure gauge safely, including oil line material, tee fittings, firewall protection, bleeding, and leak checks.

Electronic oil pressure gauge connected to an engine sender

How to Connect an Oil Pressure Gauge

Learn how to install an oil pressure sender, route wiring through the firewall, connect gauge power and ground, and test for leaks.

Pressure gauge installed on a pool filter housing

How to Change a Pressure Gauge on a Pool Filter

Learn how to safely replace a pool filter pressure gauge, seal the threads, restart the pump, and check the connection for leaks.

Tyre pressure gauge being compared with a reference gauge on a valve stem

How to Calibrate a Tyre Pressure Gauge Against a Reference Gauge

Learn how to compare a tyre pressure gauge with a reference gauge, adjust analog models, apply offsets, and decide when replacement is needed.

Pressure transmitter connected to process piping for remote pressure measurement

What Is the Function of a Pressure Transmitter?

Learn how a pressure transmitter converts process pressure into an electrical signal for remote monitoring, PLC/DCS input, control, and alarms.

Industrial pressure transmitters used for process pressure measurement

Types of Pressure Transmitters by Reference Pressure, Sensor Technology, and Application

Learn how pressure transmitters are classified by gauge, absolute, differential reference, sensing technology, and common applications.

Differential pressure transmitter connected to a manifold for zero adjustment

How to Zero a Differential Pressure Transmitter

Learn how to zero a differential pressure transmitter by equalizing the ports, using HART zero trim, verifying stability, and returning it to service.

Multimeter connected in series with a pressure transmitter loop

How to Check a Pressure Transmitter with a Multimeter

Learn how to measure a 4-20 mA pressure transmitter loop with a multimeter, verify zero and span, and interpret common fault readings.

Technician calibrating a differential pressure transmitter

How to Calibrate a Differential Pressure Transmitter

Learn how to isolate, connect, test, record, adjust, and return a differential pressure transmitter to service during calibration.

Differential pressure transmitter connected to high and low process pressure lines

How a Differential Pressure Transmitter Works

Learn how a differential pressure transmitter compares high and low pressures, senses diaphragm deflection, conditions the signal, and outputs process data.

Differential pressure gauge connected across a process component

Why Use a Differential Pressure Gauge?

Learn how a differential pressure gauge monitors filter restriction, estimates flow, and helps detect equipment or process changes.

Industrial pressure transmitter connected to control system wiring

What Signal Does a Pressure Transmitter Typically Send?

Learn why 4–20 mA is the typical pressure transmitter output signal, how live zero works, and when voltage, HART, or fieldbus signals are used.

Vacuum gauge measuring pressure in a low-pressure system

What Is a Vacuum Gauge Used For?

Learn how vacuum gauges measure pressure below atmosphere for process control, leak checks, HVAC/R evacuation, lab work, and equipment protection.

Differential pressure gauges for filter and process pressure monitoring

Types of Differential Pressure Gauges and Their Applications

Learn how diaphragm, piston, bellows, and digital differential pressure gauges differ and where each type is used in HVAC and process systems.

Vacuum gauge connected to a calibration manifold and reference standard

How to Calibrate a Vacuum Gauge

Learn how to calibrate a vacuum gauge using a traceable reference, zero checks, multi-point verification, approved adjustments, and records.

Technician calibrating a differential pressure gauge

How to Calibrate a Differential Pressure Gauge

Learn how to isolate, zero, span, and verify a differential pressure gauge for HVAC filters, air handlers, and controlled spaces.

Liquid-filled pressure gauge mounted on industrial equipment

Why Pressure Gauges Are Filled With Glycerin: Benefits, Limits, and Venting

Learn why pressure gauges are filled with glycerin, how liquid fill damps vibration, reduces wear, limits condensation, and when venting matters.

Gauge showing pressure below atmospheric pressure

What Is Negative Gauge Pressure? Principles, Limits, and Vacuum-System Risks

Learn how negative gauge pressure relates to absolute pressure, vacuum limits, cavitation, vaporization, leaks, and gauge selection.

Analog and digital pressure gauges used for pressure measurement

What Is a Pressure Gauge? Working Principles, Gauge Pressure, and Calculations

Learn what a pressure gauge measures, how mechanical and digital gauges work, and how gauge, absolute, and hydrostatic pressure are calculated.

Mechanical and digital pressure gauges used for industrial pressure measurement

What Is a Pressure Gauge? Working Principle, Types, and Practical Use

Learn how a pressure gauge works, common types such as Bourdon, diaphragm, capsule, differential, absolute and digital, and key selection factors.

Digital air-brake instrument panel showing application pressure

What an Application Pressure Gauge Shows in Air-Brake Systems

Learn what an application pressure gauge shows in air-brake systems, how it supports leak tests, and how drivers use it during controlled braking.

Vacuum gauge measuring sub-atmospheric pressure

What a Vacuum Gauge Measures and How to Read It

Learn what a vacuum gauge measures, how inHg, millibar, and microns differ, and how readings help diagnose leaks and pump performance.

Dashboard brake application pressure gauge in an air brake system

What a Brake Application Pressure Gauge Shows in an Air Brake System

Learn what a brake application pressure gauge shows, how to interpret abnormal readings, and how pressure relates to air brake performance.

Digital pressure gauge measuring pressure in a pipe system

How to Calculate Gauge Pressure for Gases, Liquids, and Leak Tests

Learn gauge pressure formulas for gases and liquids, including absolute-to-gauge conversion, hydrostatic head, and leak test errors.

Liquid-column manometer showing fluid height differences and a mercury interface

How to Calculate Gauge Pressure at Point 2 and Mercury Interfaces

Learn how to calculate gauge pressure at point 2 using hydrostatic pressure paths, fluid density, height differences, and mercury interfaces.

Mechanical and digital pressure gauges showing pressure sensing and display methods

How Pressure Gauges Work: From Bourdon Tubes to Digital Sensors

Learn how pressure gauges convert pressure into readings using Bourdon tubes, diaphragms, MEMS sensors, linkages, damping, and calibration.

Pressure gauges used for air and water service

Can an Air Pressure Gauge Be Used for Water—or a Water Gauge for Air?

Learn when air and water pressure gauges can be interchanged, and how pressure shock, trapped water, materials, and range affect safe use.

Well pump pressure gauge on a residential pressure tank system

What Should a Well Pump Pressure Gauge Read?

Learn normal well pump pressure gauge readings for 30/50, 40/60, and constant-pressure systems, plus checks for gauge and tank issues.

Water pressure gauge connected to a residential hose bib

What Should a Water Pressure Gauge Read? Safe Home PSI Ranges

Learn safe home water pressure ranges, how to check static, peak, and dynamic PSI, and when PRV or thermal expansion issues need attention.

Water pressure gauge connected to a plumbing test point

Water Pressure Gauges: Proper Use, Testing Methods, and Failure Signs

Learn how to use a water pressure gauge for static, demand, and peak checks, and how to recognize corrosion, clogging, leaks, and shock damage.

Pressure gauge installed on industrial piping

Pressure Gauges and Gauge Pressure: Principles, Uses, and Troubleshooting

Learn how gauge pressure differs from absolute pressure, how pressure gauges are selected and installed, and how common field problems are diagnosed.

Mechanical pressure gauge in a horizontal mounting orientation

Horizontal Pressure Gauge Mounting, Venting, and Ambient Reference Rules

Learn when horizontal pressure gauge mounting is acceptable, how venting and ambient reference affect readings, and why zero checks matter.

Bourdon tube pressure gauge installed on a process line

Bourdon Tube Pressure Gauge Failure: Pulsation, Vibration, and Safer Protection

Learn how pulsation, vibration, overpressure, material compatibility, and case safety design affect Bourdon tube pressure gauge failure.

Boiler temperature-pressure gauge mounted on hydronic boiler piping

Boiler Temperature and Pressure Gauge Troubleshooting and Replacement

Learn how to diagnose stuck boiler temperature-pressure gauges, blocked sensing paths, low readings, and safe tridicator replacement basics.

Boiler pressure and temperature gauge mounted on a hydronic boiler

Boiler Pressure and Temperature Gauge Replacement: Sizing, Threads, and Fit Checks

Learn how to verify stem length, pressure range, NPT thread size, and clearance when replacing a boiler pressure and temperature gauge.

Air Pressure Gauge vs. Water Pressure Gauge: Can You Swap Them?

Learn why air and water pressure gauges are not always interchangeable, including wetted materials, damping, pulsation, and water compatibility.

Pressure transmitter measuring process pressure in an industrial system

Pressure Measurement Principles and Transmitter Basics

Learn how pressure transmitters convert diaphragm motion into electrical signals and how common sensor principles differ in process measurement.

Industrial pressure gauge with safety case construction

Pressure Gauge Safety Design Under EN 837

Learn how EN 837 safety designs use blow-out devices, safety windows, baffle walls, and rear venting to reduce Bourdon tube rupture hazards.

Pressure gauge dial with technical markings and symbols

Pressure Gauge Dial Symbols and Markings Explained

Learn what pressure gauge dial symbols and markings mean, including units, accuracy class, EN 837 references, service marks, and safety indications.

Potentiometric pressure transducer with mechanical linkage and resistive element

Potentiometric Pressure Transducers: Working Principle, Design, and Applications

Learn how a potentiometric pressure transducer converts pressure-driven motion into resistance or voltage, including designs, materials, uses, and limits.

Industrial pressure gauge installed on process piping

How to Select a Pressure Gauge for Industrial Applications

Learn how to choose an industrial pressure gauge by range, accuracy, dial size, wetted materials, connections, seals, vibration and temperature.

Technician calibrating a pressure transmitter with a pressure calibrator

How to Calibrate a Pressure Transmitter

Learn how pressure transmitter calibration is planned, performed, documented, and verified using hand pumps, calibrators, or dead weight testers.

Electronic pressure transducer sensing elements

How Electronic Pressure Transducers Evolved

Trace how electronic pressure transducers evolved from strain gauges and piezoelectric crystals to capacitive and silicon piezoresistive sensors.

Pressure gauge used to illustrate pressure types and units

Types of Pressure and Pressure Units Explained

Learn how absolute, gauge, differential, vacuum, hydrostatic, and dynamic pressure differ, plus common pressure units and notation.

Bellows pressure gauge sensing element and dial mechanism

How a Bellows Pressure Gauge Works

Learn how a bellows pressure gauge uses elastic bellows motion, springs, and linkages to measure gauge, absolute, compound, and differential pressure.