LM903 Datasheet | National Semiconductor

LM903 Fluid Level Detector February 1995 LM903 Fluid Level Detector General Description The LM903 uses the thermal-resistive probe technique to measure the level of nonflammable fluids A low fluid level is indicated by a warning lamp operating in continuous or flashing mode All supervisory requirements to control the thermal-resistive probe including short and open circuit probe detection are incorporated within the device The circuit has possible applications in the detection of hydraulic fluid oil level etc and may be used with partially conducting fluids Features Y Y Y Y Y Y Y Y Y Y Flashing or continuous warning indication Warning threshold externally adjustable Control circuitry...