Differential pressure transmitter 988

Product catalog summary

General Description: The 988 series differential pressure transmitters are designed for measuring differential pressure and overpressure in various applications.

Applications: These transmitters are suitable for monitoring liquid and gaseous, non-flammable, and non-aggressive media. They are used in building automation, sanitary and industrial measurement technology, heating systems, filter and compressor monitoring, and cooling systems for heating and air conditioning.

Pressure Range: The transmitters offer different pressure ranges for optimal application adaptation, utilizing a ceramic pressure measuring cell with temperature compensation via internal PTC.

Output Signal: Available in 3-wire (0-10 V or 4-20 mA) and 2-wire (4-20 mA) versions.

Electrical Connection: Options include a 4-pin standardized device plug (DIN EN 175301 Form A) or a 4-pin M12 flange plug (A-coded, DIN EN 61079).

Technical Data: The series 988 features standard measuring ranges of 0-2 bar, 0-6 bar, and 0-10 bar, with a ceramic pressure measuring cell coated with Parylene C. The operating voltage ranges from 18-30 VDC or AC/DC, with power consumption under 1.2 W. The accuracy of the measuring cell is +/- 0.4% (typical) and +/- 1.0% (maximum).

Environmental Conditions: The transmitters operate in temperatures from -20°C to +85°C and humidity levels of 0-95% rH (non-condensed).

Process Connection: Standard process connections are 2 x inner thread G1/4 Axial.

Materials: Media-contact materials include brass or stainless steel pressure chambers and EPDM O-rings. Non-contact materials include NBR seals and ABS covers.

Protection and Compliance: The transmitters have an IP65 protection rating and conform to CE and RoHS standards.

Order Matrix: Options for pressure range, material of pressure chamber, output signal, process connection, and electrical connection are provided.

Accessories: Various mounting brackets and connection cables are available.

Catalog excerpts

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

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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) incl....

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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 / open...

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