Corrosive Chemical Compatible Flush Diaphragm Liquid Level Sensors Fluid level sensors with plastic bodies and flush ceramic diaphragms for use with corrosive chemicals where no metal parts can be exposed to the media. LMK331 Screw-In Ceramic Level Transmitter LMK809 Plastic Submersible Low Level Transmitter LMK351 High Overpressure Flush Level Transmitter LMK807 Plastic Submersible Level Transmitter 1 metre screw-in plastic level sensor for biodiesel/sulphuric acid mixture with 4 to 20 mA output200 inch range 0-10Vdc output level sensor for soap water with up to 50% NaOH concentration50in range 4-20mA output chemical liquid level sensor with flush diaphragm and IS approval