Hydraulic Pressure Transducer Selection: Surviving Spikes and Fatigue
How to choose a hydraulic pressure transducer that survives pressure spikes and cyclic fatigue: sensing tech, overpressure sizing, and field testing.
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Pressure Transmitter Turndown Ratio: What It Costs Your Accuracy
Pressure transmitter turndown ratio explained: how it’s calculated, why re-ranging hurts accuracy, the % of span vs % of URL trap, and how to size the range.
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Wireless Pressure Transmitter: How to Choose & Deploy One
How to choose a wireless pressure transmitter: when wireless beats cable, the protocol decision (WirelessHART vs LoRa vs Bluetooth vs cellular), battery life, and SCADA integration.
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Hazardous Location Pressure Transmitter Selection Guide
How to choose a hazardous location pressure transmitter: IEC Zones, NEC Class/Division, Ex d vs Ex i vs non-incendive, T-codes, and where the HM60 fits.
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Pigtail Siphon vs Condensate Pot: Steam Pressure Trap Selection Guide
How to choose between a pigtail siphon and a condensate pot for steam pressure transmitters, plus sizing, material selection, install practice, and HMK transmitter pairings.
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Precision Pressure Sensor: Where the 0.1 % FS Line Is Real
Reading precision on a pressure sensor spec sheet: the 0.1 % FS line, BFSL vs TEB, the accuracy ladder, calibration cadence, and the three HMK products that meet a real precision specification.
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How to Measure Vacuum Pressure: 6-Step Field Procedure
A six-step field procedure for measuring vacuum pressure across HVAC, process, and lab applications — gauge selection, system-port installation, decay-test diagnostics, and HE27 sensor specs.
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What Is PSI? Pressure Unit Definition & Spec-Sheet Guide
PSI pressure unit definition for engineers — pounds per square inch, conversions, and transmitter selection.
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Absolute Pressure Formula: Equation, Worked Examples & Sensor Selection
P_abs = P_gauge + P_atm explained for engineers. Three worked examples, altitude correction, unit traps, plus HM27/HE27/HPTM189 selection.
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Inches of Water Column to PSI: Conversion + HVAC & Gas Specs
Inches of water column (inWC) explained — PSI/Pa conversion table, furnace gas pressure specs, HVAC duct static range, and DP transmitter selection.
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How to Measure Static Pressure in HVAC: 6-Step Field Procedure
Field procedure to measure total external static pressure (TESP) in HVAC: 6 steps, probe placement, NEBB acceptable ranges, manometer vs DP transmitter device picks.
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Gauge Pressure Formula: Calculation, Units & Engineering Worked Examples
P_gauge = P_abs – P_atm explained for instrumentation engineers. Three industrial worked examples (tank, refinery, HVAC), altitude correction, unit conversions, and HMK transmitter selection.
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PSIA vs PSIG vs PSI: Spec-Sheet Cheat Sheet for Engineers
Decode PSI, PSIA, PSIG, PSID and PSIS on pressure transmitter spec sheets, with conversion formulas, altitude correction table, and HMK / WIKA / Rosemount SKU patterns.
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Pressure Transmitter Symbol on P&ID: PT, PIT, PDT Guide
Decode pressure transmitter symbols on a P&ID. PT, PIT, PDT explained with ISA-5.1-2024 updates, bubble conventions, tag number anatomy, and signal line types.
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Pressure Gauge Accuracy Class: 0.1 to 4.0 Selection Guide
ASME B40.100, EN 837-1, and GB/T 1226-2017 accuracy class ladder explained: 9 grades, the 4:1 calibration rule, and a 5-factor decision matrix for industrial selection.
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Negative Pressure Gauge Applications: HVAC, Cleanroom, Medical, Refrigeration, Boiler & Automotive
Negative pressure gauges in HVAC, cleanrooms, hospital isolation rooms, refrigeration, boiler draft, and automotive. Typical readings + instrument selection.
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Can Gauge Pressure Be Negative? Yes — When and How
Yes, gauge pressure can be negative. A process engineer explains when sub-atmospheric readings are normal, the unit conversion, and instrument selection.
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Supply Pressure Gauge: What It Does and Where to Spec It
Supply pressure gauge spec guide: psi ranges for pneumatic, hydraulic, instrument air & CDL airbrake; P&ID symbol; transmitter upgrade triggers.
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Oil Pressure Gauge Fluctuating: 5 Causes and Field Fixes
Industrial troubleshooting guide for a fluctuating oil pressure gauge. 5-minute decision tree, 5 causes, mechanical cross-check, tools, R/Y/G operations table.
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Bourdon Manometer: Working Principle, Types, and Limits
How a Bourdon tube manometer works, the C / spiral / helical types, accuracy class, and the 5 field limits that kill it.
