As part of the National Instruments Measurement Fundamentals Series, this set of tutorials helps you learn about a specific common measurement application topic through theory explanations and practical examples.
What You Will Learn
Essential to any data acquisition is a transducer sensor that converts real-world phenomena, such as temperature and pressure, into measurable currents and voltages. This set of tutorials is designed to provide you with essential information about using and understanding various types of sensors to acquire data.
Measuring Temperature with Thermocouples, RTDs, or Thermistors
Thermocouples are passive sensors that produce small changes in voltage with temperature. Resistance temperature sensors are active sensors whose resistance changes with temperature. Learn more about the difference between thermocouples, RTDs, and thermistors and what environments they are best suited.
Sound waves are created by pressure variations in the air. Microphones transform sound pressure into capacitive variations, which are then converted into an electrical voltage. Review the fundamentals of sound pressure, how microphones work, and how to choose the right type of microphone.
View the complete guide on microphones
Strain gages are used to measure the deformation of a material due to an applied force. The resistance of a strain gage changes with small bends and pulls on the material. Explore basic strain concepts, how strain gages work, and how to select the right configuration type.
View the complete guide on strain gages
Measuring Pressure, Load, and Torque with Bridge-Based Sensors
Pressure, load,a dn torque sensors measure force in different ways. Load cells measure force or weight. Pressure sensors measure force per unit area. Torque sensors measure the tendency of force to rotate an object. See how full bridge strain sensors are used to maesure pressure, load and torque.
View the complete guide on pressure sensors
Accelerometers are commonly used to measure vibration. They contain piezoelectric crystals that generate an electric charge proportional to force from oscillations of a solid. Learn about the theory of vibration, how accelerometers function, and and considerations for choosing the right accelerometer.