Glossary · Process instrumentation and analytical measurement
Signal conditioner
Also known as: Signal conditioning module, Signal converter
German: Signalaufbereiter
In instrumentation, a signal conditioner is a device or module that converts a sensor or field signal into a form suitable for further processing, for example by amplifying, filtering, linearizing, isolating or converting it into a standard signal.
- Process instrumentation
In one sentence
A signal conditioner converts sensor signals into a usable form by amplifying, filtering, isolating or converting them to standard signals.
Example
A signal conditioner converts the millivolt output of a load cell bridge into a 0–10 V signal for the PLC analog input.
How it applies
- Engineering: Signal conditioners bridge the gap between sensor outputs (millivolts, resistance, frequency) and controller inputs (standard current or voltage, digital values). They often sit in the control cabinet on DIN rail.
- Commissioning: Configure input type, range and output scaling, and verify the chain end to end with a known input.
- Maintenance: A conditioner is an additional element in the signal chain; its configuration must be backed up so that a replacement behaves identically.
- Documentation: Show signal conditioners in loop diagrams with their settings. Without them, troubleshooters see a mismatch between the sensor and the value in the controller that they cannot explain.
Signal conditioner vs. transmitter
A Transmitter is typically a field device combined with or close to the sensor. A signal conditioner usually sits in the cabinet and processes signals that have already been brought there.