Georg Fischer offers a variety of paddlewheel flow sensors, including: Model 525 Metalex, Model 515 Rotor-X, Model 2540 stainless steel, Model 2536 Rotor-X, and Model 2517 brass. Sensors install into 0.5" to 36" pipe sizes, they have flow rates ranging from 0.3 to 20 ft/s, a 20:1-66:1 wide turndown ratio, and come with 25 ft of cable. Sensors have applications for cooling systems, reverse osmosis, heat exchangers, chemical transport, HVAC, boiler feedback monitoring, liquid delivery systems, pure water production, etc.

Gems Sensors & Controls offers paddlewheel RotorFlow flow sensors. Sensors are available in compact/inline stainless steel, brass, and plastic housings. Sensors have flows ranging from 0.1 to 60.0 GPM, an operating range from 4.5 to 24 VDC, and a continuous analog output range from 0 to 10 VDC. Sensors feature bright, visual indications with a choice of adjustable 1 amp switched or pulsed DC outputs.

Cole-Palmer offers paddlewheel flow sensors in the following configurations: remote mount control, micro-flo rate, impeller flow, paddle-wheel flowmeters, powered in-line, etc. Sensors provide low-cost measurement, they have applications for liquids, a maximum operating temperature of 300°F, an accuracy rating of ±1-2%, and come in line sizes ranging from 1/4" to 12".

Omega Engineering, Inc. offers paddlewheel flow sensors that provide accurate and simple flow measurement. Sensors have a repeatability rating of +/- 0.1 fps, they are accurate to +/- 0.2 fps, they have flows ranging from 1 to 6977 GPM, and they have maximum pressures o f 200 PSIG @ 68°F. Sensors are made from the following materials: glass-filled polypropylene, PVDF, Hastelloy C, titanium, and FKM.

Dwyer Instruments, Inc. offers Series PFT paddlewheel flow sensors used to monitor liquid flow rates. Sensors are non-magnetic, and they are used in pipes ranging from 1 1/2 to 40". Sensors have applications for irrigation and building automation cooling systems. Other features include: inductive sensing, non-magnetic technology, field replaceable paddle-wheels, multiple wetted material choices, etc.

Panner Sales Co. offers insertion style paddlewheel flow sensors for measuring the flow of clean, water-like fluids. Signet 2537 paddlewheel flow sensors have low flow capabilities down to 0.1 m/s, they have 4-20 mA outputs, and a built-in user interface for on-site configuration. Other features include: low power, high resolution, installs into pipe sizes from DN 15-200, polypropylene/PVDF wetted materials, etc. Sensors have the following applications: cooling towers, fume scrubbers, reverse osmosis, chemical production, filtration systems, pump protection, process flow monitoring, etc.

Newport Electronics, Inc. offers insertion style FP7001A paddewheel flow sensors. Sensors feature 10mV/°C analog temperature output ratings, a wide chemical compatibility, and an ability to measure temperatures/flows simultaneously. Other features include: temperature specifications ranging from 36 to 302°F, a 5 CPS maximum vixcosity, and an accuracy of +/- 1°C. Sensor applications include high purity fluids, hard-to-handle corrosive aqueous solutions, and accurate monitoring of typical industrial water flows.

Kobold Instruments, Inc. offers DF Series paddlewheel flow sensors. Sensors have fittings ranging from 1/8" to 1 1/2" NPT, GPM ratings ranging from 0.02 to 36 GPM, temperatures up to 180°F, and a maximum pressure of 1450 PSIG. Other features include: analog or frequency output, low pressure drop, digital display, various relay options, no required straight runs, etc. Sensors are constructed from PVDF, polysulfone, trogamid, stainless steel, and brass materials.