Pressure Transducers

AST4400 Intrinsically Safe Pressure Sensor

AST4400 Intrinsically Safe Pressure Sensor

The AST4400 is an intrinsically safe pressure transmitter with a wide variety of options. With its rugged construction and the best price-to-performance ratio in the industry, the AST4400 is the solution for pressure measurement in Intrinsically Safe (IS) areas. It utilizes AST’s proprietary Krystal Bond™ Technology, a one-piece sensing element that offers excellent long-term stability and repeatable results.

Design Benefits
– Krystal Bond™ Technology
– Class I Div 1 Groups C, D Intrinsically Safe when installed with approved barrier
– ATEX / IECEx: Class I Zone 0 Exia IIB T4 Ga (Ta = -40°C to +80°C)
– CE EN61326
– ABS Type Approved
– Sil2 available with 4-20mA
– ABS (American Bureau of Shipping) Type Approval
– High strength stainless steel, Inconel or Hastelloy C276 sensor
– No oil, welds or internal o-rings
– Pressures to 20,000 PSI
– Unparalleled Price and Performance
– Compatible with wide range of liquids and gases
– EMI/RFI Protection

Applications / Industries

– HVAC/R Equipment
– Water Management
– Intrinsically Safe Control Panels
– Industrial OEM Equipment
– Pneumatics
– Hydraulic Systems
– Data Loggers
– Hammer union option available
– See also: HLR750- Intrinsically Safe Position Sensor

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

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
ShockEN 60068-2-27
VibrationEN 60068-2-6, 60068-2-64,
and IEC 68-2-32
EMI/RFI ProtectionYes
RatingIP-66, minimum

Electrical Data

Output Signal4-20mA 1-5VDC, 1-6VDC 0.5-4.5V Ratiometric 0.5-2.5V
Excitation10-28VDC 10-28VDC 5VDC,reg 3-5VDC, unregulated
Output Impedance>10k Ohms <100 Ohms, Nominal >100 Ohms, Nominal >100 Ohms, Nominal
Current Consumption20mA, typ. 5mA, typical 5mA, typical <3mA, typical
Bandwidth(-3dB): DC to 250 Hz (-3dB): DC to 1kHz (-3dB): DC to 1kHz (-3dB): DC to 1kHz
Output Noise- <2mV RMS <2mV RMS <2mV RMS
Zero Offset<±1% of FS <±1% of FS <±1% of FS <±1% of FS
Span Tolerance<±2% of FS <±1.5% of FS <±1.5% of FS <±1.5% of FS
Output Load0-800 Ohms
@10-28VDC 10k Ohms, Min. 10K Ohms, Min. 10K Ohms, Min.
Reverse PolarityYes Yes Yes Yes