Level Controllers

Level controllers are automated units for measuring the level of fluid in a contained area. They're used in systems that prevent liquid levels becoming excessively high or low.  


How do level controllers work?

Firstly, a sensor detects the fluid level in either a container or a natural setting, such as a lake. It then sends a signal – normally either pneumatic or electrical – to a control valve, solenoid, or other external control device. If the fluid level needs to be adjusted, the control valve will open or close according to the information it has received.


Types of level controllers

The two main types of level controllers are pneumatic and electric. Your choice of controller will depend on factors such as the type and density of fluid being measured, as well as the pressure of the container.

  • Pneumatic level controllers are preferred when the material is hazardous, or electricity is unavailable. 
  • Electric level controllers are useful in pressurised tanks and are generally very accurate and reliable. 

Level controllers measure either exact volumes or when fluid drops above or below a fixed point.



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Description Price Number of Inputs Mounting Style Probe Voltage Supply Voltage Overall Length Overall Width Overall Depth Response Time Minimum Operating Temperature Maximum Operating Temperature Current Rating Hazardous Area Certification IP Rating Input Type
RS Stock No. 889-1545
Mfr. Part No.LI55-1211
BrandFlowline
SGD1,266.99
Each
units
1 DIN Rail Mount, Panel Mount - 85 → 265 V ac 119mm 62mm 136mm - -40°C +65°C 3 A - IP65 Sensor
RS Stock No. 780-0298
Mfr. Part No.SM20
BrandCynergy3
SGD128.24
Each
units
1, 2, 3 DIN Rail Mount - 240 V ac, 415 V ac - - - - 0°C +50°C - - - -
RS Stock No. 746-7447
Mfr. Part No.1SVR550851R9500 CM-ENE MIN
BrandABB
SGD128.76
Each
units
- DIN Rail Mount, Screw Mount, Snap-On 30V ac 220 → 240 V ac 88.5mm 22.5mm 78mm - - - - - - -
RS Stock No. 746-7431
Mfr. Part No.1SVR550851R9400 CM-ENE MAX
BrandABB
SGD129.47
Each
units
- DIN Rail Mount, Screw Mount, Snap-On 30V ac 220 → 240 V ac 88.5mm 22.5mm 78mm - - - - - - -
New
RS Stock No. 214-6708
Mfr. Part No.61F-GP-N8H 230VAC
BrandOmron
SGD136.96
Each
units
3 - 8V 230 V 84mm - - - - - - - - -
RS Stock No. 746-7444
Mfr. Part No.1SVR550850R9500 CM-ENE MIN
BrandABB
SGD126.28
Each
units
- DIN Rail Mount, Screw Mount, Snap-On 30V ac 110 → 130 V ac 88.5mm 22.5mm 78mm - - - - - - -
New
RS Stock No. 214-6707
Mfr. Part No.61F-GP-N8D 230VAC
BrandOmron
SGD166.94
Each
units
3 - 8V 230 V 84mm - - - - - - - - -
RS Stock No. 135-6329
Mfr. Part No.1SVR740850R2100 CM-ENS.13P
BrandABB
SGD186.56
Each
units
1 DIN Rail Mount - 110 → 130 V ac, 220 → 240 V ac 113.4mm 22.5mm 113.4mm - -25°C +60°C 8.5 (220 → 240 V ac) mA, 20 (110 → 130 V ac) mA - IP20 (Terminal), IP50 (Housing) Voltage