Pressure DeltaOHM
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- HD 9408T BARO, HD 9408TR BARO, HD 9908T BARO Barometric (pressure) transmitters • SIT Centre 124 accredited laboratory for Pressure Absolute or relative pressures transmitters, DIN 43650 connectors, aluminia membrane Relative or differential pressures transmitters Very low relative or differential pressures transmitters Static port for barometric measures - HD 3604T…, HD 36V4T… Absolute or relative pressures transmitters, with DIN 43650 connectors, stainless steel membrane The qualitative level of our instruments is the result of a continuous evolving of the product itself. This way bring to slight differences between what reported on this manual and the instruments you bought. We can not completely exclude the presence of errors for which we apologise. Data, images and descriptions included in this catalogue can not be enforced legally. We reserve the right to perform any modification and correction at any time without notice.

HD3604T…, HD36V4T… Relative Pressure Transmitters HD3604T... and HD36V4T... are pressure transmitters with microprocessor and current (4...20mA) or voltage (0...5V, 1...5V or 0...10V) output, respectively. The sensor, piezoresistive, is insulated and allows gas and liquid pressure measurement over a wide range of temperatures. The measured pressure is relative to atmosphere. The different models cover the scales from 100mbar to 600bar. The case is in stainless steel 20mm diam. and encloses sensor and electronics: in order to connect it to a pressurized system, it is supplied with a ¼” BSP...

In the models with a 4...20mA current output, In the models with a voltage output, use To make the electrical connections you need to open the female connector. Current output Voltage output Remove the gasket ©.Unscrew the fairlead © and take off the gasket ©. Use a screwdriver to pry and take off the connecting terminal ©. Make the connections as shown in the figure: if present, the shielded cable braid must be connected to the earth terminal. Once the connec- tions are made, close the connector. Transmitter calibration The transmitters are calibrated at three points; no calibration is...

Technical Specifications Output Signal Current Voltage Pressure range Overpressure limit Up to 250 bars 400 nominal bars 600 nominal bars Sensor Material in contact with the measuring fluid Fluid in contact with the diaphragm Operating temperature Power supply voltage Accuracy (linearity, repeatability) Gain sensitivity to temperature changes (@ 25°C) ≤ ±0.008%F.S. between 0 and 70°C ≤ ±0.012%F.S. between -30°C and 0°C and between 70°C and 80°C Zero sensitivity to temperature changes (@ 25°C) Connection to plant under pressure ¼”BSP male 3/4 -pole faston male connector Electrical connection...

HD 20041.. and HD 20V4T... series pressure transmitters can be connected to Delta Ohm HD 9022 single input configurable indicators / regulators or with DO 9404 double input ones. The pressure transmitter has a male threaded !4" BSP. During installation, take special care to the pressure resistance of the junction. Use any appropriate seals. AGreat attention must be placed in the installation of transmitters in the pressure vessel or piping. Attention must be paid to the choice of full scale flow rate for an error, in addition to permanen- tly damage the transmitter, can cause personal...

HD4V8T Piezoresistive 10, 20, 50, 100, 200, 500, 1000, 2000 mbar ±10, ±20, ±50, ±100, ±200, ±500, ±1000, ±2000 mbar 0 … 10 Vdc standard; 4 … 20 mA 0 … 5 Vdc, 1 … 5 Vdc on request ±0.5 % F.S. @ 20°C Infinite < 1% F.S., zero; <1% F.S., span from –20°C to +60°C (from -4° to 140°F) < 1 % F.S. over 6 months at 20°C 1 sec. at 99% of bottom scale reading < 10 m sec. until it reaches the stated precision by applying a pressure level 16 … 40 Vdc or 24 Vac with output 0 … 10 Vdc 8 … 30 Vdc 10 … 40 Vdc or 24 Vac with outputs 0 … 5 Vdc, 1 … 5 Vdc < 4 mA 20 mA @ 20°C, 24 Vdc Sensor Measurement range...

ORDER CODES +Vcc Iout +Vcc Iout Nominale full scale 10 - 20 - 50 - 100 - 200 - 500 mbar (MB) 1 - 2bar (B) 0 = Current V = Voltage Output Type: +Vcc Iout D = Differential pressure -f.s … +f.s with regard to the atmosphere G = Relative pressure 0… +f.s with regard to the atmosphere +Vcc Iout Examples of connections with the HD9022 and DO9404 indicators/regulators HD4V8T with voltage output

deviation of the zero of the sensor to temperature changes: virtually eliminates maintenance. It’s available the (L) “display” option, in which the pressure is visualized on a display with 4 digits in the selected measurement unit. The (SR) “square root” is especially useful if the transmitter is connected to a pitot tube, as the output is directly proportional to the speed of airflow. The transmitters are ready to use and are supplied calibrated at 3 points by the manufacturer. Typical applications for HD404T series are clean room monitoring, filters’ control, flow measures (matched with...

HD404T can be mounted in any position, but typically on a vertical wall with the pressure facing downwards. The gap from zero due to the mounting position can be compensated by using CAL ZERO button. The procedure to follow for manual calibration of zero is the following one: • Make sure that the transmitter is powered by at least 1 hour; • Disconnect both tubes taken from the + and – pressure; • Press CAL ZERO button until the red LED starts to flash; • When the red led turns off, the reset procedure is completed and you can reconnect the tubes to pressure fits. We suggest you to perform...

CODES FOR PURCHASE ORDER SR = with square root output (not available for type D versions) AZ = with auto-zero circuit Examples of connection with HD9022 indicator regulator RANGE MODEL D = differential pressure –f.s…+f.s. G = relative pressure with reference to the atmosphere 0…+f.s. Power supply ACCESSORIES Supplied: • N°1 piece of ∅3.2/∅6.4 silicone tube 2m long • N°2 HD434T.5 plastic fittings. Under request: AP3719: Flow offtake for square or cylindrical channel. Two pieces of ∅3.2/∅6.4 tube 1m long. AP3721: Flow offtake for plastic material cylindrical channel. Two pieces of ∅3.2/∅6.4...