Flow

Flow includes flow transmitters, flow sensors, flowmeters, sight flow indicators, and water meters. Mass flowmeters, controllers, flow indicators and controllers are ideal for measurement of flow rates. Flow switches come as paddle, thermal, piezo, and shuttle/piston.

Sight Flow Indicators Sight Flow Indicators are local visual indicators of flow rate. Viewing windows at economical prices that are easily replaceable and serviceable. View More

Mass Flowmeters and Controllers This category contains sensors that indicate flow rate for low flow systems. The mass flowmeters monitor flow, pressure, and temperature. Some products are programmable. View More

Flow Indicators / Controllers This category contains remote flow indicators and controllers for use with flow transmitters. Dwyer meters and totalizers display flow rate. The weatherproof, UV resistant, large, dual line display allows for more information, making it easier to read and simpler to program. View More

Flow Transmitters Flow Transmitter are sensors with an electrical transmission output for remote indication of flow rate. The different transmitters are Ultrasonic, Paddlewheel: in-line, adjustable and fixed, electromagnetic: adjustable, in-line and fixed, and turbine: in-line. Accessories and Fittings for these flow transmitters are also in this category. View More

Flow Sensors This category contains Flow Sensors that measure flow rates. The options are In-Line or Turbine. The In-Line turbines are designed to be inserted in a pipeline through compression fitting. The turbine flow sensors are designed for any pump, pressure or gravity feed system. View More

Flow Switches Flow Switch Sensors with an electrical contact output at a specific flow rate have different types of switches, which are paddle, thermal, piezo, and shuttle/piston. View More

Flowmeters Flowmeters indicate flow rate. The different sensors include dial, in-line, ultrasonic, orifice plate, totalizing meters, variable area, venturi, or with switch output. The different designs of the flowmeters have a variety of applications. View More

Water Meters Water Meters are sensors that indicate flow totalization of water. Available are local and remote inidication models. Dwyer's multi-jet models are economical and dry dials. Each meter applies to different applications. Dwyer water meters are designed for long service life and maintenance-free operation, even under harsh conditions. View More

Questions

QUESTIONS

Question

How are Dwyer flowmeters properly read?

Answer

The flow rate is read at the maximum width portion of the float regardless of shape.

Related

Series VFC/VFCII

Series VF

Series MM

Series RM

Question

What factor is used to correct for different flowmeter inlet pressure?

Answer

If the flowmeter is exhausting to atmosphere, no correction factor is needed. If back-pressure is present due to downstream plumbing or restrictions, this error can be corrected utilizing the conversion curves in our full-line catalog or the following equation.

Pressure: Q2 = Q1 x √((P1 x T2)/(P2 x T1))

Where:
Q1 = Observed Flowmeter Reading
Q2 = Standard Flow Corrected for Specific Gravity
P1 = Actual Pressure (14.7 psia + Gage Pressure)
P2 = Standard Pressure (14.7 psia, which is 0 psig)
T1 = Actual Temperature (460 R + Temp °F)
T2 = Standard Temperature (530 R, which is 70°F)

Related

Series RM

Series VFC/VFCII

Series MM

Series VF

Question

Why are top mounted valves recommended for flowmeters used for vacuum service?

Answer

To maintain atmospheric pressure in the indicating bore and therefore preserve accuracy; an inlet restriction would reduce pressure in the bore. This is essentially the opposite situation to outlet back-pressure in a pressure system which increases pressure in the bore and also affects accuracy. Remember that all standard Dwyer flowmeters are calibrated for standard atmospheric pressure and temperature in the bore.

Related

Series MM

Series RM

Question

Is the Rate-Master® or Visi-Float® Flowmeter compatible with any media?

Answer

The Rate-Master® Flowmeter is manufactured from a polycarbonate plastic and the Visi-Float® Flowmeter is manufactured from acrylic. Compatibility charts need to be reviewed to determine if these materials of construction are compatible with your media.

Related