JH6 Water Level Sensor 3818080-1063/C

The water level sensor is a sensing element that detects the presence of liquid based on conductivity or changes in capacitance. When the sensor is immersed in the coolant, the liquid acts as a conductor to connect the circuit loop, or changes the capacitance value between the electrodes, thereby triggering the signal output. It does not rely on the mechanical movement of a float, so it is resistant to vibration, can withstand high temperatures, and has a fast response time. It remains stable and reliable in complex working conditions such as high-frequency start-stop in commercial vehicles and long-distance transportation. These sensors are usually encapsulated in stainless steel or engineering plastics and have a protection level of IP67 or above, capable of withstanding moisture, oil contamination, and electromagnetic interference. In the post-treatment system of the Euro VI standard, it works in coordination with the ECU. Once the coolant level drops below the safety threshold, it immediately triggers an instrument alarm to prevent engine overheating damage.

Experienced long-distance drivers who have driven J6 trucks know that a sudden spike in water temperature is no small matter Last time when driving on the Anhui North Expressway, the air conditioning was fully turned on, and the water temperature gauge quietly rose. Fortunately, the water level alarm light on the instrument panel lit up, and the car was pulled over for inspection. It turned out that the connection of the water supply pipe was loose and leaking, but the probe spoke up immediately, preventing the vehicle from getting stuck outside the service area. This 3818080-50A water level probe is specifically designed to fit the original structure of the J6 Liberation model. It is easy to plug and unplug, has a thick sealing ring, and is ready to use without the need for calibration. After repeated cold and hot shock tests in the temperature range of -40°C to 120°C, the signal remained clear and accurate, without false alarms or late reports. The probe body is small and does not interfere when hidden in the corner of the auxiliary water tank. Tightening it makes it stable, and even vibrations do not reach the terminal of the wiring harness. After replacing three old probes, this time there was no more "false alarm" or "silent" situation - it simply quietly follows the water level line, like a partner who never speaks but always keeps their appointment.

A water level alarm device with functions of water level display, automatic water level control, water level alarm and fault alarm. It is a water level sensing two-wire type sensor. The length of the water level immersion sensing line is displayed in the form of a single digit. When the water level is "0": the ultra-low alarm relay works and outputs; when the water level is "9": the ultra-high alarm relay works and outputs; when the water level is between "1" and "8": the water level automatic control relay works automatically.

The automatic water level alarm operates as follows: when the water level rises above the warning line, the float rises, causing the control circuit to be activated. The electromagnet then pulls down the armature, thereby connecting the alarm indicator circuit and lighting up the indicator light for an alarm. In terms of physics, the working principle can be described as an electromagnetic relay and buoyancy.