NAMUR NE 43 Fault Signaling: What 3.6 mA and 21 mA Mean
NAMUR NE 43 fault bands on a 4-20 mA loop: the 3.6 mA and 21 mA thresholds, what three manufacturers actually implement, and where the signal gets lost.
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Room Pressure Monitoring: Cleanroom & Isolation Guide
Set, measure and monitor room pressure for cleanrooms and isolation rooms: standard setpoints, cascade design, and choosing a low-range DP transmitter.
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NACE MR0175 Material Selection for Sour Service: A Pressure-Instrument Guide
How to read NACE MR0175 / ISO 15156 for a pressure transmitter: when a tap is sour, why the measuring diaphragm is the hard part, and which wetted materials keep you compliant.
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Cryogenic Pressure Measurement: How to Spec a Transmitter That Survives the Cold
How to measure cryogenic pressure for LNG, liquid nitrogen and liquid hydrogen: the -65 C sensor floor, pressure siphon and remote-seal standoff, fill-fluid freezing, 316L material selection, and range by cryogen.
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Hydrogen Pressure Transducer: How to Spec One That Lasts
How to spec a hydrogen pressure transducer: diaphragm material for permeation and embrittlement, range for the hydrogen chain, and ATEX/IECEx zone rating.
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Pressure Snubber Selection: Types, Sizing & When to Use One
How to choose a pressure snubber: porous disc vs piston vs adjustable, sizing for the spike not the steady pressure, and when to measure the pulsation instead.
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Diaphragm Seal Pressure Transmitter: When and How to Spec One
When to use a diaphragm seal pressure transmitter, how to pick the membrane material and fill fluid, and how to choose between a flush and a remote capillary seal.
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High Pressure Transducer Selection: Range, Proof & Sealing
How to select a high pressure transducer: range vs proof and burst pressure, sealing by pressure band, sensor technology, and hydrogen service.
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IP Ratings for Pressure Transmitters: How to Specify
How to spec the right IP rating for a pressure transmitter: the two digits, the IP68 depth caveat, IP-vs-NEMA crosswalk, IP69K washdown, and where water gets in.
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Impulse Lines for Pressure & DP Transmitters: Field Rules
How to route impulse lines for pressure and DP transmitters: slope, tube size, material, freeze and plugging. Field rules that keep readings honest.
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Electronic Pressure Switch: How to Choose and Set One
How an electronic pressure switch works, when a mechanical switch still wins, and how to set the setpoint and deadband without relay chatter.
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Differential Pressure Transmitter for Flow Measurement
A differential pressure transmitter is still the flow meter you will find on more lines than any other, and not because it is the most accurate. It is cheap, it is hard to kill, and it works on almost any clean fluid. The catch is that the transmitter does not measure flow at all. A…
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4-20 mA Current Loop: How the Signal Works
How a 4-20 mA current loop works: why it uses current not voltage, live zero and NAMUR NE43, loop-powered two-wire wiring, supply sizing, and mA-to-units conversion.
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High-Temperature Differential Pressure Transmitter Guide
A standard differential pressure transmitter sits at the same temperature as its electronics, and that ceiling is low. On the capacitive HM3051 cell the amplifier is rated only to +93 °C. The silicone-filled measuring element reaches +104 °C. Suppose your process is superheated steam at 250 °C, hot circulating oil at 280 °C, or a column bottom above 300 °C….
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Pressure Transducer Troubleshooting: A Symptom-First Field Guide
Pressure transducer troubleshooting by symptom: no output, stuck at 4 mA, pegged at 20 mA, drift and noise — plus loop checks and when to replace.
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How to Calibrate a Pressure Transmitter: A Field Procedure
Step-by-step pressure transmitter calibration: the 5-point method, what each point should read in mA, pass/fail scoring, and why re-ranging isn’t calibration.
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How to Select a Sanitary Pressure Transmitter for CIP/SIP Lines
A working engineer’s guide to choosing a sanitary pressure transmitter: process connections, surface finish, the 3-A/EHEDG/ASME-BPE standards, and the CIP/SIP temperature limit that catches people out.
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Pressure Transmitter Output Signals: 4-20mA vs 0-10V vs RS485
Pressure transmitter output signals compared: 4-20mA vs 0-10V vs 1-5V vs RS485 – wiring, cable distance, fault detection, and how to choose.
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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.
