257-133 RS PRO Radial Flow Turbine Flow Meter for Liquid, 1.5 L/min Min, 30 L/min Max

RS PRO Liquid Flow Sensors_x000D_ RS PRO flow transducers manufactured in acetal copolymer with brass compression fittings at both ends to fit 15 mm diameter pipe connections. These flow sensors are designed to tailor the transducer to any particular requirements and needs of the user. A variety of pipe connections, electrical terminations and flow ranges are possible giving several possible ways in which it can be arranged that should satisfy various applications._x000D_ Before installing flow sensors there are a few things to consider which are bends, valves, flow regulators, tee junctions and other fittings with cause the flow to travel faster at one side of the pipe relative to the other. This asymmetry in the flow can affect the calibration and the disturbance should be as far removed from the sensor as possible and ideally put after the flow sensor. Turbine transducers are affected by viscosity and where possible the viscosity (temperature) of the liquid should be kept fairly constant._x000D_ Sensor options include:_x000D_ 257-149 - Grey liquid flow sensor,0.25 to 6.5 l/min, 500Hz, 4600 pulses/litre_x000D_ 257-133 - Beige liquid flow sensor,1.5 to 30 l/min, 600Hz, 1200 pulses/litre_x000D_ These RS PRO flow transducers have been manufactured to the highest standards and with correct installation and maintenance they will last a long time with reliable operation throughout._x000D_ Features and Benefits:_x000D_ Provides a pulsed output proportional to flow rate_x000D_ LED and photodetector are separated by a turbine mounted on sapphire bearings_x000D_ The bearings are made of sapphire for long life and reliability_x000D_ LED requires an external current limiting resistor (dependent on supply voltage)_x000D_ Suitable for use with mains and heating system waters etc._x000D_ Rise/fall times 60/6ns_x000D_ Output voltage 200mV (low); VCC (high)_x000D_ Diode: Forward current 10mA, Power dissipation 100mW_x000D_ Body, retaining cap and rotor material is acetal copolymer_x000D_ Rotor housing is clear nylon_x000D_ Stainless steel spindle - good chemical resistance_x000D_ Nitrile rubber 'O' ring_x000D_ Length: 89 mm_x000D_ Height: 51 mm_x000D_ Width: 37 mm_x000D_ Easy to install and simple to use_x000D_ Low pressure drop_x000D_ Various flow rates_x000D_ High resolution/frequency output_x000D_ How it works_x000D_ A jet of liquid is directed at a free running turbine in a specially shaped chamber. The rate of rotation of the turbine is directly proportional to flow rate and the number of revolutions is proportional to the total amount of liquid passed. The passage of each turbine blade cuts a powerful beam of infra red light, this blocking is detected electronically._x000D_ Typical Applications:_x000D_ Flow sensors and indicators are flow meter devices used to measure the amount of liquid, gas or vapour that passes through them and each type of flow sensor has its own specific applications and installation constraints. These flow transducers have been designed for use with mains and heating system waters. Flow sensors can be found in various applications that require control of fluids such as:_x000D_ Washing machines_x000D_ Showers_x000D_ Dishwashers_x000D_ Beverage dispensers_x000D_ Water treatment_x000D_ Cooling systems_x000D_ Why RS PRO?_x000D_ RS PRO is our own brand range and brings you a wide range of high-quality, great value products offering you more choice. Trusted by engineers all over the world, every part of every RS PRO product has been rigorously tested against demanding industry standards; they’re only given the RS PRO Seal of Approval if we’re confident of their exceptional quality, which means you can be confident too._x000D_ Note_x000D_ Not suitable for use with strong mineral acids/solutions, strong or searching solvents._x000D_