AST 4401 Intrinsically Safe Pressure Transmitter
Starting at $272.00

Not in stock. Call for availability [?]

Need Help? Call a Calibration Engineer 1-800-884-4967

We're open 8:00am to 5:30pm ET


  • UL/cUL 913 (CSA 157) Class 1 Div 1 Groups A, B, C, D when installed with an approved barrier
  • Pressures up to 10,000 PSI
  • Accuracy: < ±0.25% BFSL (<±0.5% BFSL for 7500 & 10,000 PSI )
  • No oil, welds or internal O-rings
  • Wide operating temperature
  • Compatible with a variety of liquids and gases
  • IP-66 rating

The AST4401 is an intrinsically safe pressure transmitter for accurate, reliable, and cost effective pressure measurement. With its rugged construction and the best price-to-performance ratio in the industry, the AST4401 is the solution for pressure measurement in Intrinsically Safe areas.

The AST4401 is suitable for a wide range of applications with most liquids and gases and conforms to Class I Division 1 Groups A, B, C, D Intrinsically Safe when installed with approved barrier (UL / CSA). A wide range of outputs including 0.5-4.5V, 1-5V, 4-20mA, and 1-6V are available. Each pressure sensor's high strength stainless steel construction contains no oil, no welds, and no internal O-rings. Measurements are available in gauge pressure covering ranges up to 10,000 PSI with a standard accuracy of ±0.25% BFSL.

Applications for the AST4401 Pressure Sensor:

  • Industrial OEM equipment
  • HVAC/R equipment
  • Water management
  • Intrinsically safe control panels
  • Pneumatics
  • Hydraulic systems
  • Data loggers

Required Components

These additional components are required for the operation of your product. We strongly advise you to purchase these components unless you already own them or own a suitable alternative.

AST Mini DIN Mating Connector
Mini DIN 43650C right angle mating connector (includes screw & gasket) for AST pressure switches
AST Packard Mating Connector
Packard 150 Metripak 3-pin Mating Connector (Includes 3 Terminal Pins). For AST Pressure Switches


Please consider these optional accessories.

AST A08670 Cooling Adapter
1/4in NPT female to 1/4in NPT male 316L SS cooling adapter for pressure sensors, reduces the temp by 100°F at ambient temp of 70°F
In Stock


This product can be used in the following applications: