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Model DSS18T High Quality Pressure Sensor with Mounted Diaphragm Seal

Brand: WIKA Alexander Wiegand SE & Co. KG
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Diaphragm seal systems are used to protect the pressure measuring instrument from aggressive, adhesive, crystallising, corrosive, highly viscous, environmentally hazardous or toxic media. 

The diaphragm made of stainless steel provides for the separation from the medium. The pressure is transmitted to the measuring instrument via the system fill fluid which is inside the diaphragm seal system.
Features
  • Quick cleaning, without residue.
  • Milk thread fitting per DIN 11851.
  • Suitable for cleaning out of place (COP).
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Diaphragm seal systems are used to protect the pressure measuring instrument from aggressive, adhesive, crystallising, corrosive, highly viscous, environmentally hazardous or toxic media. 

The diaphragm made of stainless steel provides for the separation from the medium. The pressure is transmitted to the measuring instrument via the system fill fluid which is inside the diaphragm seal system.
Features
  • Quick cleaning, without residue.
  • Milk thread fitting per DIN 11851.
  • Suitable for cleaning out of place (COP).
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Specifications

Brand

Design

  • High-Quality Pressure Sensor, welded to Diaphragm Seal

Current Output

  • 4 ... 20 mA (2-Wire)

Power Supply

  • DC 8 ... 35 V

Accuracy at Reference Conditions

  • ≤ ± 0.5 % of Span

Permissible Load in Ω

  • Current output ≤ (Power Supply - 7.5 V) / 0.023 A

Current Supply

  • Maximum 25 mA

Dissipation Loss

  • 828 mW

Reference Conditions (per IEC 61298-1)

  • Mounting Position: Calibrated in vertical mounting position with pressure connection facing downwards
  • Power Supply: DC 24 V
  • Humidity: 45 ... 75 % Relative Humidity
  • Atmospheric Pressure: 860 ... 1,060 mbar [12.5 ... 15.4 psi]
  • Temperature: 15 ... 25° C [59 ... 77° F]

Pressure Limitation

  • ≥ 10 bar [150 psi]: 2 times
  • < 10 bar [150 psi]: 3 times

Permissible Temperature Range

  • Storage:  10° to 60° C [50° to 140° F]
  • Ambient:  10° to 40° C [50° to 104° F]
  • Medium: -10° to 80° C [50° to 176° F], for CIP and SIP Max. 130° C [266° F]

Wetted Material

  • Diaphragm Seal: Stainless Steel 1.4404 (316L)
  • Diaphragm: Stainless Steel 1.4435 [316L

Non-Wetted Material

  • Angular Connector: PBT/PET GF30
  • Zero Adjustment Ring: PBT/PET GF30
  • Case: Stainless Steel 1.4571 [316Ti]

Surface Roughness Wetted

  • Ra ≤ 0,76 μm [30 μin] per ASME BPE SF3 (Except for weld seam)

Level of Cleanliness of Wetted Parts

  • Oil and grease free per ASTM G93-03 level F and ISO 15001 (< 1,000 mg/m²)

System Fill Fluid

  • Medicinal White Mineral Oil KN 92 (FDA 21 CFR 172.878, 21 CFR 178.3620(a), USP, EP, JP)

Permissible Humidity (per IEC 68-2-78)

  • ≤ 67 % Relative Humidity at 40° C [104° F] (In accordance with 4K4H per EN 60721-3-4)
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Applications

  • Hygienic pressure measurement in sanitary applications for the food and beverage industry
  • For dairies, dairy products, breweries and soft drink production
  • Mounting to pipelines and vessels with 4 ... 20 mA output signal
  • For gases, vapour; liquid, pasty, powdery and crystallising media
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