Thermal Flow Sensor TA10/15 Ex-d - U352 - Höntzsch - #1

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Functional principle • flow measurement according to the the heat transfer method • temperature-compensated measuring Gases • pure gases, gas mixtures: air, nitrogen, methane, natural gas, hydrogen, argon, carbon dioxide, helium, sulphure hexafluoride, landfill gas ... • calibration can be carried out with a multitude of gases or gas mixtures to achieve the lowest measuring uncertainty Particles, humidity in the gas • charges in the gas caused by particles such as dust and fibres do not affect the measurement, as long as there is no abrasion or deposits on the sensor • deviations in values as a result of variable air humidity in normal atmospheric conditions are covered by the measuring uncertainty specifications Examples of application • measuring - in Ex applications - of air velocity - of compressed air and gas consumption as well as leakage flows - of laminar flow in safety cabinets or machines - in exhaust air and burner supply air - in air-conditioning applications - in air in low vacuum range with pressures greater than 200 hPa abs. Measurable variables • standard velocity Nv, standard flow rate NV/t, mass flow proportional • norm: temperature tn = +21 °C, pressure pn = 1014 hPa U352_TA1015 Exd_DoP_e_090730 http://www.hoentzsch.com 1/6 Thermal Flow Sensor TA10/15 ... ZG1 Ex-d Design / Sensor • probe with integrated transducer in the Ex-d connection enclosure • thin film sensor element Sensor TA10/15 ... ZG1 Ex-d Drawing 1: Connection on sleeve (Muffe) with inside thread provided on site Thermal flow sensor TA10/15 ... ZG1 Ex-d with integrated, configurable transducer UTA in pressure-proof Ex-d enclosure for application in potentially explosive atmospheres Advantages • application in potentially explosive atmospheres: Category 1/2 G (Zone 0/1) and Category 1/2 D (Zone 20/21) • high measuring dynamics Nv (up to 1 : 1000) • low measurement uncertainty, even at lowest flow velocities • direct air/gas mass flow proportional measuring; additional measurement of pressure and temperature is not necessary • sensor has no moving parts • stainless steel sensor housing • greater temperature and pressure resistance ranges • low installation costs • minor pressure drop thanks to small dimensions • durable • sterilisable (materialresistance of sensor allowing) • easy configuration via HART interface