Flow sensor PLF2000

mass flowmedical

Posifa designed the PLF2000 sériés of liquid flow sensors to replace mechanical turbine flow sensors. With a MEMS thermal flow die at its core, PLF2000 is far more accurate and repeatable, even when flow is pulsatile and provides a linear digital output. Because it ^as no moving parts, PLF2000 does not get stuck nor su^er mechanical breakdown. Cleaning does not require disassembly. Also, because it ^oes not introduce an obstruction (i.e. turbine) in the flow path, it présents minimal flow résistance, making it possible to circulate liquid via gravity, a boiler, or a low-power pump. PLF2000 features Posifa's third-generation thermal flow die, benefiting from the latest innovations in microfabrication. The sensor die uses a pair of thermopiles to detect changes in temperatue gradient caused by mass flow, delivering excellent signal-to-noise, and repeatability. The “solide State” thermal isolation structure éliminâtes the need for the surface cavity or fragile membrane used in competing technologies. The sensor die, with its Silicon Carbide protective film, is capable of direct contact with liquid. allowing the highest level of sensitivity and minimizing the cost of packaging. PLF2000 compiles with NSF/ANSI : Drinking Water System Components - Health Effets and can be used safely In water and beverage appliaces. PLF2000 provides both analog (voltage) and digital I2C output. APPLICATIONS •Coffee and expresso machines »Water dispensers Water purifiers and filtration systems •Beverage vending machines •Detergent vending machines •Cleaning chemical mixing systems •Liquid cooling systems FEATURES »No moving parts ٠Extremely fast response time (< 5 ms)