4250260 SENSOR for Hitachi ZX120-3/4JJ1T

Hitachi's original SENSOR - detects the slightest change and warns thousands of miles away

Hitachi Genuine Sensors are a series of high-precision sensing elements based on semiconductor technology and MEMS processes that convert subtle changes in the physical world into electrical signals that can be recognized by the control system. From the engine to the hydraulic pump, from the slewing mechanism to the running gear, every sensor is silently guarding the healthy operation of the equipment.

Pressure and temperature sensors - "pulse" of the sensing system: In the engine common rail system, hydraulic main pump, and pilot oil circuit, Hitachi's original pressure sensors monitor changes in oil and air pressure in real time with millisecond response speed. Once the pressure deviates from the set range, the control system immediately adjusts the actuator action to avoid overload damage. The water and oil temperature sensors use high-precision thermal components to ensure that the engine and hydraulic system are always operating in the optimal temperature range.

Position and angle sensors – control every rotation: From boom angle sensors to slewing encoders, Hitachi's original position sensors accurately sense the attitude of the working device. Taking LPT020A linear position sensor as an example, the resolution is as high as 1 micron, and the repeatability ± 0.05% measurement range, ensuring accurate digging trajectory and accurate bucket positioning. In intelligent construction scenarios such as automatic leveling and depth control, it is these sensors that give the equipment a "feel".

Vibration and Accelerometer - Predicting Fatigue and Failure: Hitachi's next-generation MEMS accelerometer has a noise density as low as 30 ng/√Hz, 25,000 times more sensitive than conventional commercial sensors, and a power consumption of only 20mW, which is 50% lower than conventional products. Installed in key parts such as slewing bearings, engine feet, and pump bodies, it can capture micron-level vibration anomalies and warn of early failures such as bearing wear and rotating component imbalance. This "predictive maintenance" capability allows maintenance to change from "post-remediation" to "pre-intervention".

Fluid level and flow sensors - protect the health of the "blood": the fuel level sensor ensures that the engine is constantly fed, the hydraulic oil level sensor prevents the oil pump from being sucked out, and the submersible water level gauge is used to monitor the depth of the chassis. ELR200 series water level gauge adopts semiconductor pressure sensor, with a range accuracy of ±0.2% to ±0.3%, which can work stably in extreme environments such as rivers, dams, and mines. In coal mines, water conservancy projects and other working conditions, these sensors guard the safety bottom line of equipment.

Intelligent diagnostics and environmental awareness – towards autonomous construction: Hitachi's latest sensor technology extends to the external environment of the equipment. The CoreSense™ series hydrogen sensors can continuously monitor the hydrogen content in transformer oil online and provide early warning of initial faults. The monitoring system around the excavator senses obstacles through multiple sensors and intelligently adjusts the movement of the equipment to ensure construction safety. These cutting-edge technologies have enabled Hitachi equipment to move from "mechanical" to "intelligent".

Precise sensing, intelligent decision-making, making every operation data-driven.

In the maintenance market, imitation sensors often suffer from accuracy drift, slow response, and insufficient protection—pressure sensor reading deviations can lead to overload, temperature sensor failures can cause overheating, and position sensor signal jitter can result in automatic control malfunctions. Hitachi’s original SENSORs follow the strictest industrial standards from chip design and packaging to factory calibration. Whether it’s the intense vibrations of mining machinery or cold starts in extreme low temperatures, original sensors remain consistently stable. Choosing Hitachi original sensors equips your equipment with the most sensitive “nerve endings,” ensuring every data point is reliable and every decision is precise.

Check now for the Hitachi original sensor kit corresponding to your model, and restore your equipment’s “perception system” to its factory-level sensitivity and accuracy.