LBA Series Low differential pressure sensors FEATURES Pressure ranges 250 and 500 Pa (1 and 2 inch H O) 2 Pressure sensor based on thermal micro-flow measurement Calibrated and temperature compensated Linear 0.5...4.5 V output High flow impedance up to 200 kPa/(ml/s) RoHS compliant Sensortechnics PRO services MEDIA COMPATIBILITY Dry air and other non-corrosive gases SPECIFICATIONS ELECTRICAL CONNECTION Maximum ratings 10 9 8 7 6 Supply voltage V 4.75 ... 5.25 V S DC Output current 1 mA Lead specifications Average preheating temperature gradient 2.5 K/s Soak time ca. 3 min Time above 217C 50 s Time above 230C 40 s 1 2 3 4 5 Time above 250C 15 s Peak temperature 260C Pnin Connectio 1DGN Cooling temperature gradient -3.5 K/s 2V+ s Temperature ranges 3DGN (Main) Compensated 0 ... +70 C 4Vo)ut (bidirectional devices 5Vout (unidirectional devices) Operating -20 ... +80 C 6D, 7, 8, 9, 10 GN Storage -40 ... +80 C Note: All GND pins 1, 3, 6, 7, 8, 9, 10 Humidity limits (non-condensing) 97 %RH have to be connected. 1 Vibration 20 g 2 Mechanical shock 500 g Specification notes: 1. Sweep 20 to 2000 Hz, 8 min, 4 cycles per axis, MIL-STD-883, Method 2007. 2. 5 shocks, 3 axes, MIL-STD-883E, Method 2002.4. E / 11691 / 12 1/3 www.sensortechnics.comLBA Series Low differential pressure sensors PRESSURE SENSOR CHARACTERISTICS 6 6 Peart no.Oeperating pressur Proof pressur Burst pressure LHBAS250U... 0...250 Pa/0...2.5 mbar (1 inch O) 2 LHBAS250B... 0...250 Pa/0...2.5 mbar (1 inch O) 2 bar 2 bar 2 LHBAS500U... 0...500 Pa/0...5 mbar (2 inch O) (30 psi) (30 psi) 2 LHBAS500B... 0...500 Pa/0...5 mbar (2 inch O) 2 5 PERFORMANCE CHARACTERISTICS (V =5.0 V , T =20C, P =1 bara, calibrated in air, output signal is ratiometric to V for all LBA...8... devices and S DC A Abs S non ratiometric to V for all LBA...6... devices) S C.haracteristics M.in T.yp Mtax Uni Non-linearity (1.5 % of reading + (2.0 % of reading + 0.2 %FSO) 0.2 %FSO) Tthermal effectsOCffse55...55 2 mV 00...70 C 4 SCpan55...55 1.7 % 05...70 C 2. 3 Total accuracy5+...55 C (1.5 % of reading 1.5 %FSS) (3.5 % of reading + 0...70 C 1.5 %FSS) O1ffset warm-up shift 5Vm 7 Offset long term stability 0.3 % p.a. C4urrent consumption (no load) 5 mA Response time (t63)21- ms Power-on time 10 Unidirectional devices C.haracteristics M.in T.yp Mtax Uni 4 Zero pressure offset 00.47 03.5 0.5 4 Full scale span 30.94 40.0 4.0 V Full scale output 4.50 Bidirectional devices C.haracteristics M.in T.yp Mtax Uni 4 Zero pressure offset 20.47 23.5 2.5 4 Full scale span 30.94 40.0 4.0 V Oeutputa0t max. specified pressur 4.5 a0t min. specified pressure 0.5 Specification notes (cont.): 3. Total accuracy is the combined error from offset and span calibration, linearity, pressure hysteresis and temperature effects. 4. Min. and Max. values are calculated for 5...55 C temperature range. 5. The sensor is calibrated with a common mode pressure of 1 bar absolute. Due to the mass flow based measuring principle, variations in absolute common mode pressure need to be compensated according to the following formula: P = True differential pressure 1 bara eff P = P eff sensor P = Differential pressure as indicated by output voltage sensor P abs P = Current absolute common mode pressure abs 6. The max. common mode pressure is 2 bar. 7. Figure based on accelerated lifetime test corresponding to 1 year of life. E / 11691 / 12 2/3 www.sensortechnics.com