Features: `Flashing or continuous warning indication`Warning threshold externally adjustable`Control circuitry for thermal-resistive probe`Switch on reset and delay to avoid transients`600 mA flashing lamp drive capability`Short and open circuit probe detection`70V transient protection on supply a...
LM903: Features: `Flashing or continuous warning indication`Warning threshold externally adjustable`Control circuitry for thermal-resistive probe`Switch on reset and delay to avoid transients`600 mA flashi...
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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.