Senseca HD 404T Low Pressure Transmitter

PiezoresistiveMeasuring rangeSee table 1 and 2Resolution0.1 Pa for HD404ST2… 0.5 Pa for f.s. up to 500 Pa (except HD404ST2…) 1 Pa for f.s. 1000 Pa0.1 mbar for HD404ST5… 0.05 mmH2O for f.s. up to 50 mmH2O 0.1 mmH2O for f.s. 100 mmH2O0.002” H2O for f.s. up to 4” H2O 0.01 m/s (only SR versions)AccuracySee table 1Long-term stabilitySee table 1OutputHD404T…: active analog 0…10 Vdc (RLmin=10 kΩ) or 4…20 mA (RLmax= 500Ω) HD404ST…: digital RS485 Modbus‑RTUResponse timeHD404T… with dip-switch set to FAST:0.125 s in pressure mode 1 s in speed mode (only SR versions) HD404T… with dip-switch set to LOW:configurable 1, 2 or 4 s (default 2 s) HD404ST… configurable 0.125, 1, 2 or 4 s (default 2 s)Overpressure limit50 kPaConnection to PCHD404T…:RS232 serial port can be connected to a USB port by using the optional CP27 adapterHD404ST…: can be connected to a USB port by using the optional RS48 adapterZero calibrationAutomatic for the versions with AZ optionCompatible mediaOnly air and non-aggressive dry gasesPower supplyHD404T…: 24 Vac ± 10% or 18…40 Vdc HD404ST…: 12…30 VdcAbsorptionHD404T…: < 1 W @ 24 Vdc HD404ST…: < 100 mW @ 12 VdcPressure connectionNickel-plated brass, Ø 6 mmElectrical connectionsScrew terminal block, max 1.5 mm2 , PG9 cable glandOperating conditions-10…+60 °C (-5…+50 °C for the models withAZ option), 0…95% RHStorage temperature-20…+70 °CProtection degreeIP65Installation By opening the lid, 3 mm diameter holes are available so to allowsecuring the base of the instrument directly to a panel or to the wall.844480SensorØ6Dimensions (mm) 65 Ø350Technical SpecificationsHD404TØ3LOW PRESSURE TRANSMITTERFixing holes (mm)PITOT TUBESAISI 316 stainless steel Pitot tubesfor measuring the air speed.The models with TC suffix also measure the temperature with K thermocouple sensor. Supplied with two pieces of silicone tube,internal Ø 4 mm / external Ø 6 mm, length 1.5 m.LL2DL1d1 dTransmitter with SR option connected to a Pitot tubeT1-300 T2-400 T3-800 T3-800TCd mm 3 5 8 8d1 mm 1 2 3.2 3.2D mm 6 8 8 8L mm 300 400 800 800L1 mm 30 45 -----L2 mm 72 120 192 192Operating temp.0…600 °CTemp.sensor ------TC K