American Sensor Technologies - AST4520 (Cert. ATEX)(Flush Diaphragm / Non-Clogging Level Transducers (ATEX Cert.) American Sensor Technologies

AST4520 (Cert. ATEX) Flush Diaphragm / Non-Clogging Level Transducers (ATEX Cert.)


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  • Engraved 316L Housing 
  • Protective Steel Cage Assembly 
  • Compatible with Various Chemicals 
  • Suitable for Waste, Salt, Brackish, or Fresh Water Systems 
  • EMI/RFI Protection 
  • Reverse Polarity Protection 
  • Lightening and Surge Protection 
  • Ruggedly Designed for Harsh Waste Water Environments 
  • Competitively Priced for OEM Applications 
  • Kynar PVDF Cable 
  • Excellent Price to Performance Ratio 
  • ABS (American Bureau of Shipping) Type Approval


  • Lift Stations for Wastewater, Storm water and Industrial Applications 
  • Food Tanks 
  • Viscous Liquid Tanks 
  • Heavy Oil

The AST4520 non-clogging submersible transmitter is the cost effective solution for level monitoring of turbulent tanks with viscous liquids. Approved to Class 1 Division 1 IS, Groups C and D with an approved barrier and Class I Zone 0 Exia IIB T4 Ga (Ta = -40°C to +80°C), the product ensures a safe, reliable source for level measurement. The AST4520 submersible level sensor is offered with pressures 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, this level sensor is built to handle the toughest environments.