Technical Specifications:

• Measurement Type: Absolute pressure
• Pressure Range: 0 to 100 kPa (0 to 1 bar abs) — specific range determined by suffix configuration
• Output Signal: 4–20 mA DC (2-wire) with HART 7 communication
• Accuracy: ±0.04% of URL (Upper Range Limit)
• Overpressure Protection: 4 times URL
• Process Connection: 1/2-14 NPT (male) with capillary remote seal
• Capillary Fill Fluid: Silicone oil (GRL specification)
• Ambient Temperature Effect: ±0.02% of URL per 10°C
• Static Pressure Effect: ±0.04% of URL per 10 MPa
• Response Time: ≤ 100 ms (typical)
• Power Supply: 12–45 V DC
• Protection Rating: IP67 (with cable gland)
• Certification: SIL 2 (IEC 61508), ATEX, IECEx, China Ex (Ex ia IIC T6 Ga)

Functional Features:

• HART 7 protocol for digital communication and remote configuration
• Zero and span adjustable via HART communicator or local buttons
• Diagnostic alerts (sensor fault, overpressure, underrange)
• Damping adjustable from 0.1 to 32 seconds
• Low power consumption: typical 15 mA at 24 V DC

Performance Parameters:

• Long-Term Stability: ±0.1% of URL per year
• Operating Temperature: -40 to 125°C (transmitter head), -40 to 200°C (capillary)
• Vibration Effect: ±0.05% of URL (10–550 Hz, 0.5g)
• Electromagnetic Compatibility: IEC 61326-1 compliant

Material Composition:

• Sensor diaphragm: 316L stainless steel
• Capillary tube: 316L stainless steel
• Fill fluid: High-purity silicone oil
• Process connector: 316L stainless steel
• Housing: Aluminum alloy with epoxy coating (Ex-rated version)
• Electrical connector: PBT resin with nickel-plated contacts

Structural Features:

• Compact head-mounted transmitter with capillary remote seal
• Weatherproof junction box (IP67)
• Terminal block with screw-clamp connections
• LCD display optional (local indication variant)

Working Principle:
The AXG150 uses a piezoresistive silicon sensor. Absolute pressure is measured relative to a sealed vacuum reference chamber. The process pressure acts on the diaphragm through the capillary fill fluid. The strain gauges on the diaphragm produce a millivolt signal proportional to pressure. This signal is amplified, temperature-compensated, and converted to a 4–20 mA output. HART communication superimposes digital data on the analog signal.

Advantages & Highlights:

• Absolute pressure measurement eliminates barometric compensation errors
• Capillary remote seal allows installation in high-temperature or corrosive environments
• SIL 2 certified for safety-critical applications
• High long-term stability reduces recalibration frequency
• HART communication enables remote diagnostics and configuration

Applicable Industries:

• Oil and gas (wellhead, pipeline monitoring)
• Chemical processing
• Power generation (boiler, turbine monitoring)
• Semiconductor manufacturing
• Pharmaceutical (sterile process monitoring)
• Meteorological stations

Installation Requirements:

• Mount the transmitter at or below the process connection point to avoid gas trapping in the capillary
• Ensure the capillary bend radius does not exceed 50 mm
• Use appropriate cable glands rated for the hazardous area classification
• Verify the fill fluid (silicone oil) is compatible with the process medium
• Ground the transmitter housing to prevent electrical noise

Usage Precautions:

• Do not exceed the specified overpressure limit (4× URL)
• Do not subject the capillary to sharp bends or mechanical impact
• Perform zero calibration after installation if the transmitter orientation differs from the calibration position
• Replace the capillary assembly if visible damage or leakage is detected
• Ensure the power supply voltage remains within 12–45 V DC at all times