B59011E0160A040, PTC Thermistor (Glass Encapsulated, Axial Lead)

1. Core Function

High-precision oil level / liquid level detection.It adopts PTC positive temperature coefficient characteristic: it generates heat automatically after power-on. When immersed in oil, heat dissipation is fast with low temperature, low resistance and high current; when exposed to air, heat dissipation is slow with high temperature, sharp resistance rise and current drop. It judges whether the probe is immersed in oil through parameter changes.

Essence: Contact liquid level switch / point liquid level sensor. It is not for temperature measurement, but to detect liquid presence.

2. Key Parameters

Model: B59011E0160A040 (E11 Series)Type: Glass encapsulated PTC, axial through-holeRated Resistance: 140Ω ±60% @ 25℃Max Voltage: 25V DC (12V for common use)Operating Temperature: -40℃ ~ +60℃ (with voltage applied)Features: 4bar pressure resistance, oil resistance, long service life (≥5000 cycles)

3. Application Scope

Automotive Electronics (Main Application)

• Engine oil pan oil level detection

• Transmission gear oil level monitoring

• Fuel level alarm for diesel vehicles

• Low liquid level protection for brake fluid and coolant

Industrial Equipment

• Lubricating oil level monitoring for hydraulic stations & lubrication systems

• Low oil level protection for gearboxes and compressors

• Fixed-point liquid level alarm for oil tanks and storage tanks

Home Appliances & Small Machinery

• Shutdown protection for insufficient oil of generators and water pumps

• Oil / water level detection for kitchen equipment and HVAC systems

4. Summary

B59011E0160A040 is a TDK glass encapsulated PTC oil level sensor. Powered by 12V/25V DC, it is specially used for liquid level detection of engine oil, fuel, hydraulic oil in automotive and industrial equipment, to identify oil shortage or normal oil level.