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.