Process measurement
Instrumentation & Gauges replacement guide
Identify pressure, temperature, flow, level, analytical, vibration, and other industrial instruments by range, process connection, wetted materials, signal, and approvals.
Evidence boundary. Process instruments require more than a matching range. Verify process connection, materials, signal, power, accuracy, protocol, calibration, and approvals.
Items covered01 · 15 component types
- Pressure gauges
- Pressure transmitters
- Differential-pressure transmitters
- Temperature gauges
- Thermocouples
- RTDs
- Flow meters
- Rotameters
- Level transmitters
- Load cells
- Tachometers
- Vibration sensors
- Panel meters
- Data recorders
- Process calibrators
What to capture02
Manufacturer, model, revision, range, and unitsRecord this before searching for a substitute.
Process connection, insertion length, line size, and wetted materialsRecord this before searching for a substitute.
Supply, output signal, protocol, wiring, and connectorRecord this before searching for a substitute.
Accuracy, response, turndown, damping, and calibrationRecord this before searching for a substitute.
Temperature, pressure, hazardous-area, sanitary, and environmental approvalsRecord this before searching for a substitute.
What must match03
Measurement range and accuracyConfirm it against the original equipment, duty, and source documentation.
Process connection and wetted materialsConfirm it against the original equipment, duty, and source documentation.
Electrical signal, protocol, and powerConfirm it against the original equipment, duty, and source documentation.
Pressure, temperature, vibration, and environmentConfirm it against the original equipment, duty, and source documentation.
Calibration, certification, and safety classificationConfirm it against the original equipment, duty, and source documentation.
Common searches04
What pressure gauge replaces this model?
What transmitter is compatible with this loop?
How do I replace a flow meter?
Can an instrument with the same range replace mine?
Authoritative starting points05
Source-backed field guides1 guide