Products

The AST4300 is a Class I Division 2 non-incendive pressure transmitter for use in hazardous areas. In addition to its rugged construction and industry-leading price-to-performance ratio, the AST4300 pressure transmitter is the solution for pressure measurement for a variety of applications.

AST can package the AST4300 pressure transmitter for indoor or outdoor use. It utilizes AST’s proprietary Krystal Bond™ Technology , a one-piece stainless steel sensing element that offers excellent long-term stability and repeatable results. This MEMS technology completely isolates the media to all 316L stainless steel or all Inconel718, depending on the application. A variety of process connection threads are available including 1/4″ NPT and 1/2″ NPT. Output signals are available for long transmissions (4-20mA) or low power (voltage) applications.

Design Benefits
– Krystal Bond™ Technology
– Class I Division 2 Non-Incendive Groups A, B, C, D
– ATEX / IECEx: Ex nA IIC T4 Gc (Ta = -40°C to 85°C) for conduit electrical connections
– ANSI/ISA 12.27.01 Single Seal
– CE EN61326
– American Bureau of Shipping (ABS) Type Approval
– High Strength Stainless Steel Construction with all 316L or Nickel Alloy
– No Oil-filled Cavities, Welds or O-rings
– From Vacuum to 20,000 PSI
– Unparalleled Price and Performance
– Compatible with Various Liquids and Gases
– EMI/RFI Protection

Applications / Industries
Process Control
– Gas Compression & Storage
– Off-Shore Platform ESD Compressor Systems
– Natural Gas Engine Pressure
– Oilfield SCADA Pressure Equipment
– Test Equipment
– Oxygen Pressure Measurement (316L)
– Hydrogen Fuel (316L)
– Refrigeration Pressure
– Water Management

Performance @ 25°C (77°F)

Accuracy1<±0.25% BFSL
<±0.5% BFSL from 7,500 up to 20,000 PSI
Stability (1 Year)±0.25%FS, typ
Proof Pressure2X Rated Pressure
Burst Pressure5X or 20,000 psi (whichever is less)
Pressure Cycles>100 Million
1 Accuracy includes: Non-linearity, Hysteresis and Non-repeatability

Environmental Data

Temperature
Operating-40 to 80°C (-40 to 176°F)
Storage-40 to 100°C (-40 to 212°F)
Thermal Limits
Compensated Range0 to 55°C (30 to 130°F)
TC Zero<±1.5% of FS
TC Span<±1.5% of FS
Other
ShockEN 60068-2-27
VibrationEN 60068-2-6, 60068-2-64,
and IEC 68-2-32
EMI/RFI ProtectionYes
RatingIP-66 (IP-67 optional)

Electrical Data

Output Signal4-20mA 1-5VDC, 1-6VDC 0.5-4.5V Ratiometric
Excitation10-28VDC 10-28VDC 5VDC Regulated
Output Impedance>10k Ohms <100 Ohms, Nominal <100 Ohms, Nominal
Current Consumption20mA, typ. 5mA, typical 5mA, typical
Bandwidth(-3dB): DC to 250 Hz (-3dB): DC to 1kHz (-3dB): DC to 1kHz
Output Noise- <2mV RMS <2mV RMS
Zero Offset<±1% of FS <±1% of FS <±1% of FS
Span Tolerance<±2% of FS <±1.5% of FS <±1.5% of FS
Output Load0-800 Ohms
@10-28VDC 10k Ohms, Min. 10K Ohms, Min.
Reverse PolarityYes Yes Yes