Technical Specifications:

• Measurement Type: Gauge pressure, absolute pressure, or differential pressure (per configuration)
• Sensor Type: Silicon resonant sensor
• Range: 0 to 100 kPa (0 to 14.5 psi) — indicated by “012” configuration
• Accuracy: ±0.04% of URL (Upper Range Limit)
• Turndown Ratio: 100:1
• Output Signal: 4–20 mA DC (2-wire, HART 7 compatible)
• Digital Communication: HART 7 protocol, Foundation Fieldbus (option)
• Power Supply: 12 to 42 V DC (2-wire loop-powered)
• Response Time: 10 ms (typ., 90% of step change)
• Operating Temperature: -40 to 120 °C (-40 to 248 °F)
• Ambient Temperature: -40 to 85 °C (-40 to 185 °F)
• Process Temperature: -40 to 120 °C (-40 to 248 °F)
• Overpressure Rating: 2× URL (without damage)
• Static Pressure: Up to 40 MPa (5800 psi) depending on model
• Protection Rating: IP67 (with cable gland)
• Housing Material: 316L stainless steel (standard), Hastelloy C-276, Monel (options)
• Wetted Materials: 316L SS, Hastelloy C-276, Tantalum, Gold-plated (options)
• Process Connection: 1/2″ NPT (standard), 1/4″ NPT, G 1/2, G 1/4 (options)
• Display: Optional local LCD display (HART communicator or integrated)
• Weight: Approximately 1.8 kg (4.0 lb)

Functional Features:

• Silicon Resonant Sensor: Provides exceptional long-term stability and high accuracy
• HART 7 Communication: Enables remote configuration, diagnostics, and ranging via HART communicator
• Damping: 0.1 to 32 seconds adjustable
• Zero and Span Trim: Digital trim via HART communicator (no potentiometers)
• Diagnostics: Self-diagnostic alerts for sensor faults, overpressure, and electronics failures
• Totalizer Option: Flow totalization when used with flow computers (via Foundation Fieldbus)
• Low Flow Cutoff: Configurable alarm for flow below minimum threshold

Performance Parameters:

• Long-Term Stability: ±0.04% of URL per year (typical)
• Temperature Effect: ±0.02% of URL per 10 °C (compensated)
• Static Pressure Effect: ±0.02% of URL per 10 MPa
• Vibration Effect: ±0.02% of URL (10–55 Hz, 0.5 mm amplitude)
• Insulation Resistance: 100 MΩ minimum at 500 V DC
• Dielectric Strength: 1500 V AC for 1 minute
• EMC Compliance: EN 61326-1, EN 61000-6-2, EN 61000-6-4
• SIL Rating: SIL 2 capable (per IEC 61508)

Structural Features:

• Compact cylindrical housing (approx. 72 mm diameter × 160 mm length)
• 1/2″ NPT process connection (standard)
• IP67 cable gland entry (M20 × 1.5)
• 316L stainless steel wetted parts
• Optional remote seal for high-temperature or corrosive applications
• DIN rail mounting bracket available as accessory

Working Principle:
The PA1F uses a silicon resonant sensor element. Process pressure acts on a silicon diaphragm, causing mechanical stress that changes the natural resonant frequency of the silicon element. This frequency shift is detected by an electronic oscillator circuit and converted into a digital pressure value. The microprocessor linearizes the signal, applies temperature compensation, and outputs a 4–20 mA signal proportional to the measured pressure. HART communication is superimposed on the 4–20 mA signal using frequency-shift keying (FSK).

Advantage Highlights:

• Silicon Resonant Technology: Superior long-term stability (±0.04% URL/year) versus capacitive sensors
• HART 7 Compatibility: Full remote configuration without opening the transmitter housing
• 2-Wire Operation: Loop-powered design eliminates separate power supply wiring
• High Turndown (100:1): Single transmitter covers wide flow ranges
• SIL 2 Certified: Suitable for safety-instrumented functions
• No Mechanical Trim: All calibration performed digitally via HART

Applicable Industries:

• Oil and gas (wellhead, pipeline, refinery)
• Chemical processing
• Power generation (boiler, turbine, condenser)
• Pharmaceutical manufacturing
• Water and wastewater treatment
• Pulp and paper
• Food and beverage
• HVAC and building management

Installation Requirements:

• Install pressure tap perpendicular to pipe wall (avoid top or bottom of horizontal pipe for liquid service)
• Use impulse tubing of appropriate length and material for the process fluid
• Install manifold with equalizing valve for maintenance isolation
• Ensure process connection is leak-tight (use appropriate sealant/gasket)
• Route signal cable away from high-power cables (minimum 300 mm separation)
• Ground the transmitter housing to plant earth
• For differential pressure: install both impulse lines at the same elevation

Usage Precautions:

• Do not exceed 2× URL overpressure or permanent sensor damage will occur
• Verify process connection rating matches maximum process pressure and temperature
• Use HART communicator (e.g., Yokogawa HT200) for all configuration changes
• Perform zero trim with process valve closed and equalizing valve open
• Do not apply pressure to the sensor before completing electrical connections
• Replace remote seals if diaphragm shows signs of corrosion or deformation