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.
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
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
- How are Dwyer flowmeters properly read?
- The flow rate is read at the maximum width portion of the float regardless of shape.
- What factor is used to correct for different flowmeter inlet pressure?
- 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))
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)
- Why are top mounted valves recommended for flowmeters used for vacuum service?
- 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.
- Is the Rate-Master® or Visi-Float® Flowmeter compatible with any media?
- 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.
- Are special ranges available for the Rate-Master® and/or Visi-Float® Flowmeter?
- Yes, other ranges are available which are not specified in our catalog. Please feel free to contact Dwyer with questions on these ranges.