SLS Intelligent Electronic Level Switch
  • SLS Intelligent Electronic Level Switch
  • SLS Intelligent Electronic Level Switch
  • SLS Intelligent Electronic Level Switch
  • SLS Intelligent Electronic Level Switch

SLS Intelligent Electronic Level Switch



SLS - electronic level switch, transmitter and display in one device.

    SLS Intelligent Level Switch is designed for level monitoring and measurement of liquid and oil media. It is applied to general industry such as tank, case, liquid cell and deep well. It is level switch, transmitter and display in one device. In its standard configuration it has optional two switching outputs (PNP or NPN), an analog output signal (0...20mA| 4…20 mA or 0...5V| 0…10 V) as well as with RS485 Link.

     The level switch SLS takes the high integrated ARM industrial-grade MCU as the core. The SPS ensures fast-speed and precise level measurement and switch movement by carefully adjustment and combining high-precision AD switch and high stabile pressure sensor. The setup using the three big back-lighted buttons and the display on machine make it very easy for on-site parameters setting.

     There is a large number of measurement ranges available from a smallest measurement range of -0…1m H2O to 100mH2O. The zero point can be adjusted by bottons. The connection elements are consist of stainless steel and airway cable with a blowhole in the core. Hence, it has high sealing perfromance and is well suited for a large variety even of corrosive media. Supporting standard MODBUS, the SLS makes it possible to remote data collection and parameters setting, free customers from buying extra communication adapters. For electrical connection the SLS has an M12x1 connector.

     The SLS is compactly designed with housing with electrical connection against process connection rotatable 330°, display against housing turnable 180°, making it very easy for on-site installation and monitoring.


General industry such as tank, case, liquid cell and deep well


Product features:

1. Liquid and oil media level measurement

2. PNP switching, voltage and current outputs

3. Switching points settable

4. Switching can be set normally open / normally closed

5. Supporting Switching delay

6. Various analog output ways available

7. Displaying pressure peak value and environment temperature

8. Analog output span settable

9. High light switch indicating

10. OLED self-luminous display

11. Display turnable 180°

12. Housing with electrical connection against process connection rotatable 330°

13. Industrial touch button

14. Various display pressure units

15. Media density settable

16. Parameters setting up for Password protection

17. Optional Chinese and English menu

18. Support MODBUS communication


Technical Parameters:

Measuring range

0…1mH2O to 100mH2O



Supply Power

12…30V DC

Temp. Error


Long-term Stability


Analog output accuracy


Measuring Media

Water, mineral-based hydraulic fluid and Synthetic oil

Wetted material

Stainless steel, Nitrile Butadiene Rubber and PTFE

Output Configurations


switching+voltage+ communication


switching+current+ communication

2×PNP + 0mA/4mA20mADC + MODBUS

Switching current 


Switching type

normally open , normally closed (settable)

Switching respond time


Switching  delay


Switching motion mode

delay or windows mode

Analog signal output and maximum ohmic load RL

Current output

0/4…20mA20…4/0mA RL≤0.5kΩ

Voltage output

0…5/10V5/10…0V     RL>10kΩ

Screen display


Menu language


Switching instruction

2X Red LED

Displaying pressure units

kPa, mm, cm, m


3X blue back-lighted touch buttons

Displaying supplementary variables

environment temp., analog output value, max. Peak value,mini. peak value

Supplementary variables displaying mode

fixed displaying or INFO button switching Display

Working temperature


Media temperature


Storage temperature


Electromagnetism compatible

GB/T 17626.2/3/4-2006

Shock resistance

≤10g/10Hz...500Hz(IEC 60068-2-6-2007)

Vibration resistance

≤50g/11ms(IEC 60068-2-27-2008)

Protection Rating

IP65 / IP68



  • Company Name:Hefei WNK Smart Technology Co., Ltd
  • Add:5F, Bldg 2A-2B, Mingzhu Industrial Park,  Intersection of Mingzhu Ave and ChuangXin Ave, High-Tech Zone Hefei 230000, China
  • Contact:WNK
  • Mob:+86-18156545248
  • Tel:
  • Email:[email protected]