Digitally compensated highly accurate voltage output transducers for precise measurement of gauge, absolute and differential pressures.

# Precision

## High Accuracy, Precision & Resolution Pressure Gauges

Pressure gauges for high accuracy pressure measurement with high resolution digital displays, high precision pressure measurement technology and selectable pressure units for use in the laboratory as a secondary pressure standard.

## LHR – Linearity, Hysteresis and Repeatability

Linearity, Hysteresis and Repeatability (LHR) is often used to describe the room temperature precision of a pressure sensor, excluding all zero & span offsets, temperature errors and long term stability. Also see non-linearity and pressure hysteresis.

## Accuracy

Accuracy of a measurement instrument defines how much a measurement value may deviate from the perfect measured value.

## Precision

Precision is the measure of how closely a set of readings will be to a reference line that passes through the middle of all the points.

## NL – Non-Linearity

Non-Linearity is the deviation error derived from the straightness of a set of recorded measurements when compared to a straight line, such as bsl or tsl, drawn through all the results. The maximum non-linearity error is normally expressed as a percentage of full scale.

## Pressure Hysteresis

Pressure Hysteresis is the difference between two separate measurements taken at the same pressure but one where the pressure was increasing and the other where the pressure was decreasing. The hysteresis is caused by the natural reluctance of a pressure sensing material such as a diaphragm to return to its original position, shape or form […]

## BSL – Best Straight Line

Beast straight line (BSL) is the mathematically derived straight line which runs through the middle of a set of readings in such a way to achieve the smallest error across all the results. The measurement precision of a device is often specified in relation to the maximum deviation from the best straight line.

## Calibration Error Calculator

Use this calibration error calculator to determine the accuracy of a measurement device which has a linear input and output characteristic.

## Measurement Accuracy

There are many contributing error factors which go into a total uncertainty calculation. The way accuracy is defined for pressure instruments on technical data sheets can vary significantly across manufacturers and product types.

## Pressure Calibration

This guide will answer many of your questions about using & selecting pressure calibration equipment.