Technical Articles & Selection Guides
Flow Meter Installation
Magnetic Flow Meter Straight Run Requirements
Match the design code and nearby fittings, then check the available upstream and downstream pipe lengths.
Flow Measurement Maintenance
How Often Should a Flow Meter Be Calibrated?
Separate flow calibration, electronic verification and signal checks, then use as-found records to review the next calibration date.
Flowmeter Diagnostics
Prosonic Flow W 400: Read Diagnostic Messages
Read the complete W 400 HART diagnostic message, distinguish pending and previous events, and keep the signal path in your handover record.
Flowmeter Diagnostics
Prosonic Flow 91 F881: Sensor Signal Checks
A focused guide to the Prosonic Flow 91 F881 sensor-signal code, with manual links, installation checks and a before-and-after record.
Control Valve Guide
Control Valve Sizing Formula: Liquid Cv/Kv Input Checks
Use paired operating conditions and the right pressure reference in liquid Cv/Kv calculations, with worked examples that expose common input mistakes.
Flow Measurement Guide
Flow Meter Accuracy Calculation: Add Terms or Choose a Range?
Calculate flow meter accuracy from reading, full-scale and conditional specifications. Learn when to add terms and when to choose one flow range.
Level Measurement Guide
Radar Level Transmitter Beam Angle: Calculate Beam Width Before Choosing a Mounting Point
Calculate radar beam diameter and radius, check obstacles at their depth, and use the exact antenna specification before reviewing a mounting point.
Pressure Control Guide
Pilot Operated Pressure Reducing Valves: Steam, Water or Hydraulics?
Identify the service, pilot function and operating range before comparing pilot operated pressure reducing valves for steam, water or hydraulic circuits.
Flow Measurement Guide
Insertion Electromagnetic Flow Meters: Three Checks Before Selection
Check liquid conductivity, single-point or full-profile sensing, and pipe geometry before choosing an insertion electromagnetic flow meter.
Compressed Air Measurement Guide
Compressed Air Flow Meter CFM: Range & Installation
Check the CFM reference basis, pipe-specific measuring range and dryer location before choosing a compressed air flow meter.
Check Valve Installation Guide
Check Valve Flow Direction: Arrow and Mounting Position
Match the flow arrow, then verify mounting position for the exact check valve configuration. See why the series name alone is not enough.
Wastewater Measurement Guide
Wastewater Flow Meter Types: Choose by Pipe Conditions
Choose wastewater flow measurement by full-pipe, partly filled or open-channel conditions, then verify the liquid and installation.
DP Level Guide
DP Level: Wet Leg, Dry Leg and Why 0% May Not Mean 0 kPa
Distinguish zero level, zero differential pressure and sensor trim with a defined wet-leg example and signed LRV/URV self-check.
Troubleshooting Guide
Pressure Transmitter Stuck at 4 mA: Check Mode and Loop Power
Separate an expected 4 mA signal from a fixed output, then check the two-wire loop voltage budget using the exact transmitter and fitted options.
Control Logic Guide
Float Switch Water Level Controller: Fill vs Empty Logic
Understand fill and empty sequences, the retained state between two levels, and the different roles of start, stop and alarm points.
Selection Guide
Vacuum Sensor Selection: Gauge, Absolute and Output
Gauge or absolute pressure? Define the reference, range and signal before choosing a vacuum sensor for industrial use.
Selection Guide · 4 min
Multipoint Float Level Switch: Specify the Switching Points
Define switching points, check dimensional limits and match the contact arrangement before specifying a multipoint float level switch.
Manual Guide · 2 min
SAMSON 3730-3 Manual: Match Type and Firmware
Choose between classic Type 3730-3 and two TROVIS manual branches using the device name, hardware and firmware, with direct official document links.
Technical Guide October 2026 · 4 min
Rosemount 3051 Calibration: Zero, Sensor and Output Trim
Separate pressure-reading, loop-current and range problems before selecting zero, sensor or output trim for a Rosemount 3051 HART transmitter.
Selection Guide · 4 min
High-Temperature Float Switch Selection: 6 Checks
A 200°C rating is only the first check. Compare liquid SG, mounting access and contact limits using Flowline and Cynergy3 specification examples.
Technical Guide October 2026 · 4 min
Fisher DVC6200 Troubleshooting: HART and Response Checks
A practical diagnostic guide for DVC6200 HW2 HART units: identify the right manual, separate communication and response faults, and collect useful evidence.
Technical Guide October 2026 · 4 min
SIPART PS2 Initialization: RUN Messages and Checks
A practical guide to SIPART PS2 initialization messages, feedback-design differences and the observations to record before troubleshooting.
Procurement Guide August 2026 · 6 min
Yokogawa EJA110E RFQ Checklist
What to confirm before quoting a Yokogawa EJA110E differential pressure transmitter.
Procurement Guide August 2026 · 6 min
Honeywell PX2/PX3 Replacement RFQ Checklist
What to confirm before sourcing Honeywell PX2/PX3 replacements or MIP alternatives.
Procurement Guide July 2026 · 6 min
Siemens SITRANS P320/P420 RFQ Checklist
What to confirm before sourcing or replacing a Siemens SITRANS P320/P420 pressure transmitter.
Procurement Guide July 2026 · 6 min
ASCO 320 (8320) Solenoid Valve RFQ Checklist
What to confirm before sourcing or replacing an ASCO 320 (8320) 3-way solenoid valve.
Procurement Guide July 2026 · 7 min
Rosemount 644 Model Code RFQ Checklist
What to confirm before sourcing or replacing a Rosemount 644 temperature transmitter.
Procurement Guide July 2026 · 7 min
Masoneilan SVI II AP Positioner RFQ Checklist
What to confirm before sourcing or replacing a Masoneilan SVI II AP digital valve positioner.
Procurement Guide July 2026 · 7 min
AUMA AM/AC Actuator Controls RFQ Checklist
What to confirm before sourcing AUMA AM or AC actuator controls and related spare parts.
Procurement Guide Updated October 2026 · 5 min
Fisher FIELDVUE DVC7K Digital Valve Controller RFQ Guide
Check DVC7K-H input modes, HART communication and device revisions, with the official manual and RFQ checklist.
Procurement Guide July 2026 · 7 min
Fisher 3582/3582i Positioner RFQ and Calibration Checklist
What to confirm before sourcing Fisher 3582/3582i positioners, calibration help, replacements, parts and documents.
Procurement Guide July 2026 · 7 min
AUMA SA/SAR Actuator Spare Parts and RFQ Checklist
What to confirm before sourcing AUMA SA/SAR actuator replacements, spare parts, wiring details and documents.
Procurement Guide July 2026 · 7 min
Rotork IQ3 Wiring, Commissioning and RFQ Checklist
What to confirm before sourcing a Rotork IQ3 or IQ3 Pro actuator, including wiring, torque, control and commissioning details.
Procurement Guide July 2026 · 6 min
ABB TZIDC Digital Valve Positioner RFQ Guide
What to confirm before sourcing an ABB TZIDC digital valve positioner for control-valve service.
Procurement Guide July 2026 · 6 min
VEGA VEGAPULS 6X Radar Level Sensor RFQ Guide
What to confirm before sourcing a VEGA VEGAPULS 6X radar level sensor, including range, antenna and approvals.
Procurement Guide July 2026 · 6 min
Yokogawa EJX110A Differential Pressure Transmitter RFQ Guide
What to confirm before sourcing a Yokogawa EJX110A differential pressure transmitter, including model code, range and approvals.
Procurement Guide July 2026 · 6 min
Endress+Hauser Micropilot FMR60B RFQ Guide
What to confirm before sourcing an Endress+Hauser Micropilot FMR60B radar level sensor, including order code, antenna and approvals.
Procurement Guide July 2026 · 6 min
Siemens SIPART PS2 Positioner RFQ Guide
What to confirm before sourcing a Siemens SIPART PS2 valve positioner, including order code, signal, enclosure and mounting details.
Procurement Guide July 2026 · 6 min
Fisher DVC6200 Digital Valve Controller RFQ Guide
What to confirm before sourcing a Fisher DVC6200 digital valve controller, including model code, protocol, actuator mounting and nameplate data.
Procurement Guide July 2026 · 6 min
Rosemount 3051 Model Code RFQ Guide
What to confirm before sourcing a Rosemount 3051 pressure transmitter, including model code, range, output and process connection.
Procurement Guide July 2026 · 6 min
ASCO 257 Pilot Solenoid Valve RFQ Guide
What to confirm before sourcing ASCO 257 pilot solenoid valves, including voltage, ports, enclosure and dust collector duty.
How to Select a Radar Level Transmitter: VEGA vs E+H vs Siemens
Rotork vs AUMA: Choosing the Right Electric Valve Actuator
Coriolis vs Electromagnetic Flowmeters: When to Use Which
Solenoid Valve Selection: 2/2 vs 3/2, Direct vs Pilot Operated
Rosemount 3051 vs Yokogawa EJA110E vs Siemens P320
Procurement March 2026 · 5 min
How to Source Obsolete Industrial Spare Parts Without Downtime
Practical strategies for finding discontinued parts and qualifying form-fit-function replacements.