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Ratiometric

Ratiometric is used to describe an output signal which changes in proportion to a change input or supply voltage.

A typical ratiometric device would be a strain gauge output pressure sensor, where the output sensitivity is described as a ratio between output and input supply voltage.

If the sensor is described as having a 3 mV/V ratiometric output sensitivity, this means that the full spanĀ output will increase by 3 millivolts for every 1 volt increase in supply voltage.

Featured strain gauge based measurement products

  • TPH Strain Gauge Ultra High Pressure Sensor - Very high range pressure sensor with a millivolt output signal for pressure ranges from 1000 up to 5000 bar gauge.
  • Yacht diesel fuel and water level sensor for non-uniform shaped marine tanks - Submersible level sensors for irregularly shaped fresh water, grey water, black water, and fuel oil tanks on a classic sailing yacht.

Glossary of Measurement Signal technical terms

  • 2 Wire
  • 3 Wire
  • 4 to 20 mA Current Loop Output Signal
  • 4 Wire
  • Amplified Voltage Output
  • BFSG – Bonded Foil Strain Gauge
  • Deadband
  • FSO – Full Scale Output
  • HARTĀ®
  • Intrinsic Safety
  • mV/V – Millivolts per Volt Output Signal
  • NC – Normally Closed
  • NO – Normally Open
  • Piezoresistive Strain Gauges
  • Rangeable
  • Span
  • Span Offset
  • Span Sensitivity
  • Square Root Extraction
  • Threshold
  • Totalizer
  • Transducer
  • Transmitter
  • TSL – Terminal Straight Line
  • TSS – Thermal Span or Sensitivity Shift
  • Turndown Ratio
  • USB
  • Vented Cable
  • Wheatstone Bridge Strain Gauge
  • Zero Offset
  • Zero Tare

Help from Measurement Signal resources

  • Transforming a 2 wire Current Loop into a Voltage Output Signal
  • Supply voltage and load resistance considerations for pressure transmitters
  • What can cause random variation in pressure transducer output
  • What is the difference between zero offset and zero drift?
  • Why use 4-20mA and 3-15 psi rather than 0-20mA & 0-15psi

Guidance with Measurement Signal requirements

  • Wireless
  • Measurement Signal
  • Rangeable
  • Intrinsic Safety
  • High Frequency Response
  • Digital Interface

Tools for Measurement Signal calculations

  • Pressure Sensor Calculator
  • Temperature Sensor Calculator
  • DP Flow Transmitter Output Calculator
  • 4 to 20 mA Supply, Load, Shunt and Signal Calculator

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  • Pressure
  • Level
  • Temperature
  • Interfacing
  • Datalogging
  • Calibration
  • Wireless

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