Differential pressure transmitter 988
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Differential Pressure Transmitter 988 General description The differential pressure transmitters of the 988 series are used to measure differential pressure and overpressure. Application Monitoring of liquid and gaseous, non-flammable and nonaggressive media. Possible areas of application • Building automation • Measurement technology in the sanitary and industrial sector • Differential pressure measurement between supply and return in heating systems • Monitoring of filters, fans and compressors • Cooling systems for heating / air conditioning Pressure range For an optimal adaptation to the application, different pressure ranges are available. The measurement is carried out by a ceramic pressure measuring cell, temperature-compensated via internal PTC. Output signal In the 3-wire version there is an output signal of 0 ... 10 V, or 4 ... 20 mA available. For the 2-wire version the transmitter provides an output signal of 4 ... 20 mA. Electrical connection The electrical connection of the transmitter is optionally available with a 4-pin standardized device plug according to DIN EN 175301 Form A, or with a 4-pin M12 flange plug, A-coded, according to DIN EN 61079. OEM versions, assembled versions and different connection threads, as well as other measuring ranges are available on r

0-2 bar; 0-6 bar; 0-10 bar Design at pressure level PN40 Ceramic pressure measuring cell Al2O3 with Parylene C coating 24 VDC 24 V AC/DC (50-60 Hz) 18 – 30 VDC 18 – 30 V AC/DC < 0.51 W (VA) < 1.2 W (VA) Standard measuring ranges and pressure measuring cells (Special measuring ranges on request) Related voltage Admissible operating voltage Power consumption Output singal (linear) Resolution 14 bit Output load Medium, operating and storage temperature Media not freezing or with suitable frost protection! Accuracy measuring cell (FS pressure cell*) Effect of temperature (FS pressure cell)...

Order matrix Pressure range Material of pressure chamber Output singal Process connection Electrical connection 0 … 2 bar 0 … 6 bar 0 … 10 bar Brass Stainless steel 0 … 10 V 3-wire 4 … 20 mA 3-wire 4 … 20 mA 2-wire G 1/4 axial Connection plug EN 175301-803 Form A, without female power connector Connection plug EN 175301-803 Form A, including female power connector Flange connector M12 / 4-pin / A-coded Metal mounting bracket L-Form Metal mounting bracket S-Form Universal mounting bracket U-Form Connection cable / M12 connector / 4-pin / A-coded / female / straight / 4 x 0.34 mm² / 2 m /...

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