HART vs 4-20mA: HART 7 Guide for Pressure Transmitters
HART isn’t a replacement for 4-20mA — it’s a digital layer on top of it. See when the HART 7 upgrade pays back, and when pure 4-20mA is still enough.
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4-20mA Pressure Transmitter Wiring: 2-Wire, 3-Wire & 4-Wire Guide
You’ve got a new 4-20mA pressure transmitter in hand and you need to wire it correctly the first time — without frying the board, starving the loop of voltage, or spending three hours debugging why the PLC reads zero. Here’s the short version before we get into the diagrams: in about 90% of industrial pressure-transmitter…
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Gauge vs Absolute Pressure: The 95/5 Rule (and the Sealed-Gauge Trap) for Process Instrumentation
Absolute pressure vs gauge pressure explained by a 35-year refinery engineer — the 95/5 decision rule, the sealed-gauge trap, altitude drift for 5 US sites, and how to pick the right HMK transmitter.
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High Temperature Pressure Transducer: 4 Proven Methods from 250°F to 2192°F (and How to Pick Yours)
Choose the right pressure sensor for high temperature service from +250°F to +2192°F. 4 methods compared with real specs and custom options from HMK-TECH.
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Pressure Sensor vs Transducer vs Transmitter: A Three-Axis Decision Framework (2026 Guide)
Stop confusing pressure sensor, transducer, and transmitter. Use our 3-axis framework — distance, frequency, power — plus 3 real project cases from Europe, Singapore and the US to choose the right one in 30 seconds.
