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hontzsch flow measuring technology Hand-held unit HFA-Ex A handy and easy-to-use anemo-meter for measuring flow velocity, volume flow and température of air/gases and water/liquids in explosive atmosphères. Measurable variables are the flow velocity v in m/s and the température t in *C 411 associated Hontzsch vane wheel flow sensors with approphate plug can be connected to the HFA-Ex display unit: • sensors for non idirectional sensing • sensors for idirectional sensing • sensors with integrated température probe PT100 • température probe PT100 • sensors designed as probes or measuring tubes The HFA-Ex with its associated sensors is a pièce of equipment in ATEX Ex ia IIC T4 type of protection, intended for use in potentially explosive tmospheres: Category 2 (Zone 1) Examples of Application Controlling measurement in potentially explosive atmosphères • measurements in outgoing air, exhaust gases, flue gases, process gases ... also in aggres-sive médiums up to 500 °C • incoming and outgoing aîr in paint spraying booths in the automobile Industry • on filtenng devices and ventila-tlng fans • of deposit gas in garbage dumps U262 HFAEx DoP e 110729 • regulating and adjusting air conditioning and ventilating Systems • monltoring/measuring backflow when uslng ± dlrectlonal sensing sensors • uslng velodty area method to détermine the flow rate or the average flow velocity by approval tests and inspections for proof of guarantee according to VDI/VDE 2640 • distribution measurement of natural gas Corresponding Documents • U117 Data Sheet Vane Wheel Flow Sensors FA • U116 Overview FA • U205 User's Information FA Probes • U260 Directions for Use HFA-Ex • U264 Operating Instructions HFA-Ex http://www.h0ent2sch.com 1/3
