The SLS level switch is designed for level monitoring of liquids and oil media, and is suitable for general industrial fields such as tanks, enclosures, liquid tanks, and deep wells. This product integrates liquid level switch, transmitter, and display. It comes standard with two switch outputs (PNP or NPN), one analog output signal (0... 20mA | 4... 20mA or 0... 5V | 0... 10V), and one RS485 interface.

The SLS pressure switch adopts a highly integrated ARM industrial grade MCU as its core, combined with a high-precision AD converter and a high stability pressure sensor. After careful calibration, it ensures fast and accurate liquid level measurement and switch action. The design of three large touch buttons with backlighting and integrated display makes on-site parameter settings very convenient.
There are multiple measurement ranges available from 0... 1mH2O to 100mH2O. Zero point can be adjusted by pressing the button. The contact components are air conducting cables with ventilation holes in the middle and stainless steel, with good sealing performance. The scope of application is very wide, even including corrosive media. Supports standard MODBUS protocol, enabling remote data collection or parameter setting without the need to purchase additional communication adapters. Use standard M12x1 electrical plug.
The device is designed to be compact, with a 330 ° rotation between the main body and the process connection, and the display can also be flipped 180 °, making it convenient for on-site installation and monitoring.

Product Features:
Liquid and oil level measurement
PNP switch, voltage, current output
Switch points can be set
The switch can be set to normally open or normally closed
Support switch delay action
Multiple analog output modes can be set
Auxiliary display of peak liquid level and ambient temperature
Can set analog output range
High brightness switch indicator
OLED self luminous display
Display can be flipped 180 degrees
The device body can rotate 330 degrees
Industrial grade touch button design
Multiple liquid level display units to choose from
Provide medium density settings
Provide password protection for parameter settings
Chinese and English menus are optional
Support MODBUS communication

Technical parameters:
Measurement range: 0... 1mH2O to 100mH2O
Accuracy ≤ 0.5% FS
Power supply 12... 30V DC
Temperature error ± 0.02% FS/℃ (zero point/full degree)
Long term stability ± 0.3% FS/year
Analog output accuracy ≤± 0.2% FS
Measurement of medium water, mineral based hydraulic oil, synthetic oil
The material for the liquid receiving part is stainless steel, nitrile rubber, or polytetrafluoroethylene

Output configuration
Switch+voltage+communication 2 x PNP+0V~5VDC/10VDC+MODBUS
Switch+current+communication 2 x PNP+0mA/4mA~20MADC+MODBUS
Switching current 1.0A (Max.)
Switch type: normally open, normally closed (adjustable)
Switch response<10ms
Switch delay 0.00s~1000.0s
Switch action mode, hysteresis mode or window mode
　　

Analog signal output and large load resistance RL
Current output 0/4... 20mA, 20... 4/0mA RL ≤ 0.5k Ω
Voltage output 0... 5/10V, 5/10... 0VRL>10k Ω

Screen display OLED
Menu language: Chinese English
Switch indicator 2X red LED
Display units kPa, mm, cm, m
3x blue backlit touch button

Auxiliary variables display environmental temperature, simulated output values, small peak values, and large peak values
The display mode of auxiliary variables is fixed or switched through the INFO button
　　

Working temperature -30 ℃~80 ℃
Medium temperature -30 ℃~80 ℃
Storage temperature -40 ℃~80 ℃

Electromagnetic compatibility GB/T 17626.2/3/4-2006
Vibration ≤ 10g/10Hz... 500Hz (IEC 60068-2-6:2007)
Impact ≤ 50g/11ms (IEC 60068-2-27:2008)

Protection level

Switch body | Liquid level probe IP65 | IP68