WIKA UPT-20 / UPT-21 Universal Process Pressure Transmitter

$1,000.00

The WIKA UPT-20 / UPT-21 Process Transmitter delivers reliable, configurable pressure measurement for industrial process control. Featuring high measurement accuracy, integrated temperature compensation and optional HART communication, it supports precise monitoring in demanding applications.

The UPT-20 features a standard pressure connection, while the UPT-21 offers a flush diaphragm design for hygienic and process applications. With a large rotatable display, flexible configuration options and robust housing choices, the UPT series adapts to diverse installation requirements.

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The WIKA UPT-20 / UPT-21 is a universal industrial pressure transmitter designed for accurate pressure monitoring and process control. It converts measured pressure into an electrical signal and offers configurable measuring ranges, digital operation and optional HART communication.

The two models accommodate different process connection requirements: UPT-20 for standard pressure connections and UPT-21 for flush diaphragm connections, including selected hygienic configurations.

Key Features

  • High measurement accuracy: Standard accuracy of 0.15% of span, with other options available.
  • Flexible pressure measurement: Supports gauge, absolute and vacuum pressure, depending on configuration.
  • Multiple output options: 4–20 mA and optional HART communication.
  • Large rotatable display: High-contrast LCD with a bar graph for convenient on-site readings.
  • Flexible configuration: Local operation and parameter adjustment through the display and control buttons.
  • Robust housing options: Conductive plastic or stainless steel, depending on configuration.
  • Integrated temperature compensation: Helps maintain measurement stability under varying temperature conditions.
  • Industrial protection: IP66/IP67 protection and hazardous-area approvals available for selected configurations.

Suitable Applications

  • Process Automation: Pressure monitoring and process control.
  • Machine Building: Pressure measurement in industrial machinery.
  • Chemical & Petrochemical Industries: Process pressure monitoring.
  • Food & Beverage: Pressure measurement with suitable hygienic connections.
  • Pharmaceutical Industry: Hygienic process monitoring.
  • Plant Engineering: Pressure monitoring in industrial systems and equipment.

Application suitability depends on the selected process connection, wetted materials, seals and approvals.

UPT-20 vs. UPT-21

UPT-20 — Standard Pressure Connection

  • Designed for conventional industrial pressure measurement.
  • Suitable for machinery, plant engineering and general process applications.
  • Available with various threaded pressure connections.

UPT-21 — Flush Diaphragm Connection

  • Designed for applications requiring a flush process interface.
  • Suitable for selected hygienic and pharmaceutical applications.
  • Offers specialized process connections for compatible installations.

Technical Highlights & Selection Considerations

  • Pressure Range: Confirm the required gauge, absolute or vacuum pressure range.
  • Process Connection: Select a standard pressure port for UPT-20 or a compatible flush diaphragm connection for UPT-21.
  • Output Signal: Choose 4–20 mA or the appropriate HART-enabled version.
  • Display: Determine whether an integrated LCD is required for local readings and configuration.
  • Wetted Materials & Seals: Verify compatibility with the process medium, temperature and operating pressure.
  • Housing & Approvals: Confirm the required enclosure material, IP protection and hazardous-area certification.
  • Operating Conditions: Check process temperature, ambient temperature, pressure fluctuations and installation requirements.

Frequently Asked Questions (FAQ)

Q1: What is the difference between the WIKA UPT-20 and UPT-21?

The UPT-20 uses a standard pressure connection, while the UPT-21 uses a flush diaphragm connection for applications requiring a flush process interface, including selected hygienic installations.

Q2: Does the UPT series support HART communication?

Yes. HART communication is available on selected versions. Confirm the required output and communication protocol when ordering.

Q3: Can the transmitter measure absolute and vacuum pressure?

Yes. Gauge, absolute and vacuum measurement ranges are available depending on the model and configuration.

Q4: Does the UPT series have a digital display?

An integrated LCD display is available as an option. The display supports local reading and instrument configuration.

Q5: Is the UPT-21 suitable for food and pharmaceutical applications?

The UPT-21 offers flush diaphragm and selected hygienic process connections. Confirm the required connection standard, sealing material, temperature limits and applicable approvals for the specific application.

Q6: What information is required for a quotation?

Provide the model, pressure range and type, process connection, output signal, display requirement, wetted materials, seal material and any required hazardous-area or hygienic approvals.

Process Versions & Enclosure Construction

Instrument Concept Universal industrial process transmitter with threaded pressure port, diaphragm seal assembly, or aseptic sterile process connections
On-Site Display & Operation Unit Optional digital display Model DI-PT-U with large high-contrast segment display, integrated bargraph, and 4-button intuitive setup menu (readable from up to 5 m away)
Enclosure Materials (Non-Ex) Conductive PBT plastic (EN 60079-0:2012, night blue RAL5022);
Precision-cast stainless steel 1.4308 (CF-8) for chemical/petrochemical duties;
Electropolished stainless steel 1.4308 for sanitary/pharmaceutical/food industries;
Epoxy resin coated stainless steel options
Enclosure Materials (Hazardous Ex) Precision-cast stainless steel with epoxy resin coating or electropolished stainless steel with epoxy resin coating

Measurement Accuracy & Performance Limits

Accuracy (IEC 61298-2) Standard: 0.15% of span (options: 0.1% or 0.2% of span);
0.5% of span for measuring ranges > 1,000 bar (15,000 psi)
(Accuracy encompasses non-linearity, hysteresis, non-repeatability, zero offset, end value deviation, temperature effects, and long-term stability)
Turndown & Rangeability Recommended turndown up to 20:1 (≤ 1,000 bar); up to 2:1 (> 1,000 bar)
No accuracy degradation at turndown ≤ 5:1 for ranges 1.6 to 1,000 bar
Non-Repeatability ≤ 0.1% of span (≤ 1,000 bar); ≤ 0.5% of span (> 1,000 bar)
Zero Point & Span Adjustment Zero point: -20 to +95%; Span: -120 to +120% (≤ 1,000 bar); Mounting correction: -20 to +20%
Long-Term Stability Ranges ≥ 1.6 bar: 0.1% / year
Ranges 1.0 to 1.6 bar: 0.15% / year
Ranges < 1 bar: 0.35% / year
Thermal Stability No additional temperature error within compensated range 10 to 70 °C (50 to 158 °F) for ranges up to 1,000 bar;
Outside compensated range: typically < 0.1% / 10 K

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