REO TEMP Series 42TL Tank Level Sensor uses a highly sensitive, solid-state pressure transmitter which is completely isolated from the fluid by an elastomer sleeve and fluid fill.

Catalog (pdf)		Features: Accurate dependable level readings +/- 2" Can be flushed or rodded clean without removing from tank or dissembly Full 360 degrees pressure reading Integral LED display available Simple design Available for both vented and pressurized tanks 4-20mA output Materials of Construction: Body and flanges: Carbon Steel, optional 316SS Elastomer diaphragm: Buna-N, EPDM, Viton, Food-Grade Rubber Fill fluid: Silicone Oil

The Red Valve Tank Level Sensor are not affected by foaming, ice and other conditions that can cause errors in Ultrasonic and capacitance Level Sensors. The Red Valve Tank Level Sensors uses a high sensitivity, solid state, pressure transmitter that is completely isolated from the process fluid by an elastomer sleeve that transmits pressure through a fluid fill.

The unit can be outfitted to read pressure in vented tanks or differential pressure in pressurized tanks.  It can easily be calibrated for specific gravity and depth of tank.  A 4~20 mA output signal is provided and an integral LED displays pressure in any desired units. 

The elastomer diaphragm allows maximum surface area within a minimum diameter, allowing installation at the very bottom of the tank.  The sensor can be mounted to a pipe stub and blind-flanged to allow cleaning in the event of a blockage.  The Tank Level Sensor has also been tested for installation on the  drain/fill line of a tank, and performs equally well with static pressure or under flow conditions during filling or draining.  The Tank Level Sensor is available in 2" and 3" threaded sizes, or with standard ANSI flanges in sizes 2" to 12".