Learning outcomes
- Explain the key principles of pressure, flow, level and temperature instruments.
- Carry out a structured practical check or configuration task.
- Recognise common faults, risks and evidence needed for diagnosis.
Module 8 · Lesson 2
Pressure, flow, level and temperature instruments
Select and apply common industrial measurement technologies for pressure, flow, level and temperature.
Before you begin
Process conditions and manufacturer selection guides.
Safety: Use site procedures, approved test equipment and competent supervision. Never bypass a protection or interlock without formal control.
Step-by-step learning
- Define process fluid, range, temperature, pressure and installation constraints.
- Select a suitable sensing principle and wetted materials.
- Plan straight pipe, tapping, stilling, mounting and environmental requirements.
- Define failure indication and maintenance access.
Ian's practical tips:
- The best sensor is the one that suits the process and can actually be maintained.
- Non-contact level instruments still need a clear measurement path and correct reference point.
Fault-finding questions
- What should be happening, and what evidence proves it?
- Where is the last known correct signal, voltage, state or process condition?
- What changed immediately before the fault?
- Can the system be divided into smaller testable sections?
Practical activity
Create a one-page test record for this lesson. Include expected values, measured results, equipment used, risks controlled, defects found and the final proven condition.