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Flow

Coriolis Transmitter

Coriolis Flow Transmitter. A device that measures the mass flow rate and density of a fluid flowing through a tube and converts that measurement to an electrical signal that can be used to operate an integrated digital or analog readout, or to control another device. The liquid being measured flows through a vibrating tube, which provides the rotating reference frame enabling the Coriolis effect.

  • SPEC #: 17410
  • Code: 17-04-01

Flow Transmitter, Positive Displacment and Paddle

Paddlewheel and Positive Displacement (PD) Flow Transmitters: Paddlewheel devices have a paddle wheel mounted perpendicular to the flow path, and are used determine the flow, in an enclosed pipe, of gas, air, and liquids. PD devices measure the volume or flow rate of a moving fluid or gas by dividing the fluid or gas into fixed, metered volumes or parcels. These devices have a rotating or reciprocating mechanism that allows passage of these parcels. The number of parcels that pass through the chamber determines volume. The rate of revolution or reciprocation determines the flow rate.

  • SPEC #: 17470
  • Code: 17-04-07

Magmeter Flow Transmitter

Magmeter Flow Transmitter. A device with no moving parts that measures the volumetric flow a fluid, and converts that measurement to an electrical signal that can be used to operate an integrated digital or analog readout, or to control another device. Because the measurement is based upon Faraday’s Law, which involves ratio between the velocity of a conductor through a magnetic field and the voltage generated, the fluid being measured must be electrically conductive. There are two common types of magmeter transmitters: insertion and in-line.

  • SPEC #: 17420
  • Code: 17-04-02

Orifice Flow Transmitter

Orifice Flow Transmitter. A device that measures the flow rate of liquids or gases, and converts that measurement to an electrical signal that can be used to operate an integrated digital or analog readout, or to control another device. The flow is measured through the differences in pressure from the upstream side to the downstream side of an obstruction (the orifice) that narrows flow path and causes the liquid or gas to constrict. The greater the flow, the greater the difference in pressure.

  • SPEC #: 17430
  • Code: 17-04-03

Rotameter

Rotameter. A device that measures the flow rate of liquid or gas in a closed tube. It is a variable area meter, which measures flow rate by allowing the cross sectional area that the fluid travels through to vary. A rotameter consists of a tapered glass tube with a float inside that is pushed up by flow and pulled down by gravity. At a higher flow rate more area is needed between the float and the tube to accommodate the flow, so the float rises. The float is shaped so that it rotates axially as the fluid passes, allowing one to tell if the float is stuck since it will only rotate if it is free. Readings are usually taken from the top of the float.

  • SPEC #: 17440
  • Code: 17-04-04

Switch

Flow Switch: A device that monitors flow and sends an electronic signal to another device such as a pump to protect or control it. Flow switches are used for pump protection, cooling circuit protection, flow-rate alarms, and general flow monitoring. Flow switches are available for use with air, steam or liquid.

  • SPEC #: 17450
  • Code: 17-04-05

Switch - Differential Pressure

Differential Pressure Switch. A device which uses differential air pressure to actuate an electric switch at a pre-set actuation point. This may be the difference between two positive or two negative pressures, one of each, or a positive and atmospheric or a negative and atmospheric pressure.

  • SPEC #: 17460
  • Code: 17-04-06

Transmitter/Controller For Gas

Gas Flow Transmitters/Controllers. These devices measure gas flow in pipes or ducts ranging from _ in tubing to flue stacks greater than 25 ft in diameter, and generates an electrical signal that can be used to control a readout, controller component, or other device. Usually ultrasonic in design, they are obstructionless, cause no pressure drops, and require little maintenance. Analog and digital outputs in velocity and actual volumetric flow rate are standard.

  • SPEC #: 17480
  • Code: 17-04-08