Flow and Temperature Sensors

Occurs between objects that are touching each other. Collisions between small particles allow fast moving, or vibrating, particles to give some of their microscopic kinetic energy to slower particles.

Uses the principle (Von Karman) that when a fluid flows around an obstruction in the flow stream (bluff object), eddies or vortices are shed alternately

downstream of the object

It measure the force resulting from the acceleration caused by mass moving toward (or away from) a center of rotation.

Are used in many monitoring and control applications, to measure both air and liquid flows.

Operates based on the concept that the pressure drop across the meter is proportional to the square of the flow rate, and the flow rate is found by measuring the pressure differential and taking the square root

Most variable are meters require vertical orientation but this flowmeter can be mounted in any orientation.

The only flow measurement technology that directly measures the volume of the fluid passing through the flowmeter. The flowmeter achieves this by repeatedly entrapping fluid in order to measure its flow.

Types of Flow

Use the principle that the amount of heat removed from a heated temperature sensor by a flowing fluid can be related to that

fluid’s velocity. Commonly applied to air velocities with 50 to 12,000 feet per minute

Has linear relationship between the volumetric air flow rate and its differential pressure. The differential pressure in rated flow rate is quite low so it doesn’t affect the characteristics for any test parts.