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LM1042 Datasheet

Part NameDescriptionManufacturer
LM1042 Fluid Level Detector National-Semiconductor
National ->Texas Instruments National-Semiconductor
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LM1042 image

General Description
The LM1042 uses the thermal-resistive probe technique to measure the level of non-flammable fluids. An output is provided proportional to fluid level and single shot or repeating measurements may be made. All supervisory requirements to control the thermal-resistive probe, including short and open circuit probe detection, are incorporated within the device. A second linear input for alternative sensor signals may also be selected.

Features
■ Selectable thermal-resistance or linear probe inputs
■ Control circuitry for thermal-resistive probe
■ Single-shot or repeating measurements
■ Switch on reset and delay to avoid transients
■ Output amplifier with 10 mA source and sink capability
■ Short or open probe detection
■ +50V transient protection on supply and control input
■ 7.5V to 18V supply range
■ Internally regulated supply
■ -40°C to +80°C operation

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