Technical Specifications:

• Measurement Type: Differential Pressure, Static Pressure, Process Temperature (3-variable simultaneous)
• DP Range: 0 to 100 kPa (configurable, typical ranges: 0–2.5 kPa to 0–1000 kPa)
• Static Pressure Range: 0 to 16 MPa (160 bar)
• Temperature Range: -40°C to +120°C (process fluid)
• Output Signal: 4 to 20 mA DC (HART 7, FF, or PA protocol selectable)
• Accuracy (DP): ±0.04% of URL (Upper Range Limit)
• Accuracy (Static Pressure): ±0.1% of span
• Accuracy (Temperature): ±0.1°C
• Process Connection: FF1 — DIN flange-to-flange (DN50, PN40, RF face per DIN 2527)
• Drain/Vent: FN1 — 1/2″ NPT female (bottom connection)
• Wetted Material: Hastelloy C-276
• Process Temperature (ambient): -40°C to +85°C
• Protection Rating: IP67 (IEC 60529)
• Explosion Proof: Ex d IIC T6 Gb (ATEX), FM Class I Div 1, CSA Class I Div 1

Functional Features:

• Simultaneous 3-variable measurement from a single process tap — eliminates need for separate instruments
• Local LCD display shows all 3 process variables, bar graph, and device status
• HART 7, FOUNDATION Fieldbus H1, Profibus PA protocol selectable
• Built-in temperature sensor (Pt1000) for process temperature measurement
• SIL 2 certified (IEC 61508) for safety instrumented functions

Performance Parameters:

Material Composition:

• Wetted Parts: Hastelloy C-276 (UNS N10276) — superior resistance to chlorides, sulfuric acid, and mixed acids
• Diaphragm Seal: Hastelloy C-276 with fluorocarbon (FKM) O-ring
• Housing: Aluminum alloy (AL6063-T5) with epoxy polyester powder coat (RAL 5010)
• Cable Gland: 316L Stainless Steel with nickel plating

Structural Characteristics:

• Dimensions: 168 mm (H) × 118 mm (W) × 155 mm (D) (excluding flanges)
• Weight: Approximately 6.5 kg (with FF1 flanges)
• Flange Dimensions: DN50 (2″), PN40, RF face, bolt circle 110 mm, 4 × M12 bolts
• Display: 128 × 64 pixel LCD with white backlight, 4-line text + bar graph

Working Principle:
The transmitter uses a resonant silicon sensor for differential pressure and static pressure measurement. The silicon diaphragm vibrates at its natural resonant frequency (~100 kHz), which shifts proportionally to applied pressure. A capacitive pick-off detects the frequency shift and converts it to a digital pressure value. The integrated Pt1000 RTD measures process temperature via 4-wire resistance measurement. The microprocessor fuses all 3 variables using proprietary algorithms to compensate for temperature effects on DP and SP readings. The result is transmitted as 4–20 mA + HART digital signal.

Key Advantages:

• Hastelloy C-276 wetted parts — handles the most aggressive chemical processes (HCl, H2SO4, acetic acid, chlorides)
• 3-variable measurement from single connection — reduces process penetrations by 66%
• SIL 2 / SIL 3 capable — suitable for safety-critical applications
• DIN flange connection (FF1) — standard European piping compatibility

Applicable Industries:

• Chlor-alkali plants (chlorine gas, caustic soda)
• Sulfuric acid production
• Pharmaceutical reactor monitoring (aggressive solvents)
• Offshore oil and gas (seawater injection)
• Pulp and paper digester monitoring

Installation Requirements:

• Install vertical or inclined (process connection at bottom) for liquid service
• For gas service, install process connection at top or side with vent at top
• Use DN50 PN40 DIN flanges with spiral wound gasket (graphite + 316L)
• Connect drain/vent (FN1) to closed collection system for hazardous fluids
• Bond the transmitter housing to plant ground (impedance < 1 Ω)

Usage Precautions:

• Do not exceed 16 MPa static pressure — will permanently deform the silicon sensor
• Do not apply pressure to the drain/vent (FN1) fitting when process is pressurized
• Perform zero calibration with both process connections at equal pressure (for DP)
• Replace diaphragm seals every 5 years in corrosive service (even with Hastelloy C-276)
• Verify HART communication address is unique on the loop before commissioning