Differential pressure level measurement explained: hydrostatic principle, four install configs (open tank, closed tank dry/wet leg, bubbler), LRV/URV calculation, interface measurement, and how DP compares to radar and guided-wave for refinery, tank farm, and separator service.
Cold junction compensation explained: what it is, 5 methods, real error budget for Type K, and the 3 field failure modes nobody documents.
Learn how a differential pressure transmitter works — from ΔP sensing and three sensor technologies (capacitive, diffused silicon, resonant silicon) to static pressure effects and 3-valve manifold startup.
RTD vs thermocouple — compare accuracy, range, response speed, wiring, drift, and cost. Learn the 500°C rule engineers use to pick the right sensor.
You need to replace a thermocouple — or spec one for a new line — and the catalog shows eight letters. K, J, T, E, N, S, R, B. Each has a different alloy pair, a different temperature ceiling, and a different set of environments where it thrives or fails. Most thermocouple-type references list those…
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.