Autrol APT 3500
Smart Pressure Transmitter
The Autrol APT 3500 is a microprocessor-based smart transmitter designed for advanced pressure, differential pressure, level, and flow measurement. With ±0.04% accuracy, HART 7 / Fieldbus communication, and long-term stability, it delivers reliable performance across demanding industries such as oil & gas, power, chemical, marine, and refining.
It includes automatic temperature compensation, self-diagnostics, and EEPROM protection, making it a robust solution for critical measurement applications.
- Multiple configurations: Differential, Gauge/Absolute, High Static Pressure, Level, Flow
- High reference accuracy: ±0.04% of calibrated span
- Wide rangeability: 100:1
- Long-term stability: ±0.125% URL for 60 months
- Automatic ambient temperature compensation
- Continuous self-diagnostics and EEPROM write protection
- 3-line LCD display with external Zero & Span buttons
- Digital communication: HART 7, Fieldbus Foundation
- Loop powered: 4–20 mA + digital signals
- CE EMC conformity, fail-safe process function
Protocol
4–20 mA analog, HART 7, Fieldbus Foundation
Trim Functions
Zero, DAC, Full
Power / Load
24 VDC, 250–550 Ω loop resistance
Failure Mode
Low ≤ 3.78 mA, High ≥ 21.1 mA
Process Temperature
-40 to +120 °C (-104 to +248 °F)
Rangeability
100:1
Stability
±0.125% URL for 60 months
Display
3-line LCD with diagnostics and engineering units
- Safety: SIL2 (TÜV, FMEDA)
- Hazardous Area: Ex d, Ex ia, FM, ATEX, IECEx, TR CU (EAC), INMETRO, KCs
- Marine Approvals: ABS, DNV, BV, LR, KR
- Other Approvals: CE, RoHS, NEMA 4X, IP66/67
- Oil & Gas – Custody transfer, process pressure & flow monitoring
- Chemical & Refining – Corrosive and high-pressure service
- Power Generation – Boiler, steam, and turbine applications
- Marine & Offshore – Certified for vessels and offshore systems
- Water & Utilities – Pressure and flow measurement in clean and industrial water systems
