AST4520 Submersible Liquid Level Sensor

Submersible flush diaphragm pressure sensor built to handle the toughest environments

About the AST4520 Submersible Liquid Level Sensor

The AST4520 Flush Submersible liquid level sensor is the cost effective solution for level monitoring of turbulent tanks with viscous media. Approved to UL/cUL913 Class 1 Division 1 IS, Groups C and D with an approved barrier, the product ensures a safe, reliable source for level measurement. The AST4520 is also certified to ATEX / IECEx Class I Zone 0 Exia IIB T4 Ga (Ta = -40°C to +80°C).
The AST4520 is offered with pressure ranges from 0-2.5 to 0-15 PSIG. The AST4520 steel cage front end design allows for proper flow of liquids while keeping the sensor at the bottom of the tank or well. With an engraved stainless steel housing and Kynar PVDF cable, thissensor is built to handle the toughest environments.


Key features AST4520

  • Engraved Housing
  • Protective Steel Cage Assembly
  • Kynar PVDF Cable
  • Compatible with Wide Variety of Chemicals
  • Ruggedly Designed for Harsh Waste Water Environments
  • Suitable for Waste, Salt, Brackish, or Fresh Water Systems
  • EMI/RFI and Reverse Polarity Protection
  • Lightning and Surge Protection
  • Competitively Priced for OEM Applications
  • ABS (American Bureau of Shipping) Approved


Applications AST4520

  • ABS (American Bureau of Shipping) Approved
  • Lift Stations - Wastewater, Storm Water, Industrial Applications
  • Food Tanks
  • Viscous Media Tanks
  • Heavy Oil


Measurement Range
0 - 0.14 bar to 0 - 1 bar
0.5 - 2.5V non - ratiometr. [3 - 5 VDC], 1 - 5 VDC, 4 - 20 mA
Pressure Type
2X, Min
Supply Voltage
10 – 28 V, 3 – 5 V
Operating Temperature
-40 to 80 °C
Port Material
316L, Alloy C276
Pressure Port/Fitting
1/2 MNPT Flush, G 1/2 M Flush, Steel Cage
Electrical Connection
Conduit 25 ft, Conduit 50 ft, Conduit 75 ft
Custom Cable Lengths
  • Follow us: