详情描述


I. Overview


The JEF101 series intelligent pressure switches are integrated intelligent digital pressure measurement and control products that combine pressure measurement, display, output, and control. This product features a full electronic structure, utilizing an oil-filled, isolated-diaphragm pressure sensor at the front end. The output signal is amplified and processed by a high-precision, low-drift amplifier, then sent to a high-precision A/D converter, which converts it into a digital signal that the microprocessor can handle. The processed signal controls two switches to measure and control the pressure of the control system. The intelligent digital pressure switch is versatile, easy to operate, simple to tune, and reliable. It is widely used in industries such as hydropower, tap water, oil, chemicals, machinery, and hydraulics for measuring, displaying, and controlling fluid medium pressure.


Section II: Features


◆ 4-digit display for the current pressure value.


◆ Pressure preset switch points and delay switching output


◆ The switch quantity can be set arbitrarily between 0 and full scale.


The housing features nodes with action-emitting LEDs for easy observation.


◆Adjustable via buttons and on-site parameter settings, easy to operate.


◆ 2-channel switch output, 1.2A load capacity


◆ Analog Output (4-20 mA)


III. Technical Specifications


Control Range0~100MPaControl Precision≤±0.5%FS
Stability≤0.2% /yearDisplay Accuracy±0.1%FS
Display Method4-digit digital tubeDisplay Range-1999~9999
Power Range24V±20%Power Consumption< 3W
Load Capacity<24V1.2AWire methodFive-core aviation plug
Ingress Protection (IP) ratingIP65Switch lifespanOver 1 million times
Ambient Temperature-30℃~70℃Medium Temperature-40℃～85℃
Storage Temperature-40℃～85℃Relative Humidity0~80%


IV. Installation


4.1 Mechanical Connections:



JEF101 can be directly mounted on the hydraulic pipeline through a pressure tube fitting (DIN3582 external thread G1/4) (other size fittings can be specified upon order). In critical applications (such as severe vibration or impact), the pressure tube fitting can be mechanically decoupled through a micro-hose.


4.2 Electrical Connections:



1 Red: Power+ 2 Yellow: Power- 3 Blue: Switch 1 4 Green: Switch 2 5 Grey: 4-20mA


To prevent the impact of electromagnetic interference, the following precautions should be taken:


● Keep the line connections as short as possible


● Shielded wire


Avoid direct proximity to user equipment or wiring of electrical and electronic devices that may cause interference.


If micro-tubing installation is used, the housing must be grounded separately.


Panel buttons and menu functions


Switch Function


Delays Function


If the system pressure fluctuates around the preset value, the lag function can maintain the stability of the output state. If the system pressure increases, the output state will switch when reaching the activation point (ALxH). If the system pressure decreases, the output state will only return to the original when the main valve closure point (ALxF) is reached.


ALxH > ALxF is a normally open function


　　ALxH


Window Function


The window mode allows monitoring the specified allowable range. When the system pressure varies between the opening point (ALxH) and the closing point (ALxF), the output function will switch (window function/open) or not switch (window function/closed). The width of the window can be set by the difference between ALxH and ALxF. The delay time (0.1~30.0 seconds) filters out unnecessary instantaneous pressure peaks or high-frequency signals. When the pressure reaches the switching condition, the switch output does not change immediately but only after the delay time ends. If the delay time ends and the switch event is also gone, the switch output will not change.