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. 446-2654
Mfr. Part No.EFLC3 230VAC 50/60HZ
$195.33
Each
units
2 DIN Rail Mount 8V ac 230 V ac 85mm 70mm 63.5mm - -20°C +60°C - - - -
RS Stock No. 240-9011
Mfr. Part No.MK9151.11 2-450kOhm AC220-240V
BrandDold
$232.90
Each
units
1 DIN Rail Mount 10V ac 220 → 240 V ac 82mm 22.5mm 99mm - -20°C +60°C - - - -
RS Stock No. 111-3527
Mfr. Part No.K7L-AT50B
BrandOmron
$350.86
Each
units
1 DIN Rail Mount - 12 → 24 V dc 12.8mm 46mm 28.8mm - -10°C +55°C - - - -
RS Stock No. 144-9334
Mfr. Part No.84800054
BrandXylem
$1,989.61
Each
units
10 Panel Mounted 10V ac 240 V ac 96mm 96mm 130mm - -10°C +60°C 800 μA - - -
RS Stock No. 135-6331
Mfr. Part No.1SVR740850R0100
BrandABB
$206.70
Each
units
1 DIN Rail Mount - 24 → 240 V ac/dc 113.4mm 22.5mm 113.4mm - -25°C +60°C 11 mA - IP20 (Terminal), IP50 (Housing) Voltage
RS Stock No. 746-7431
Mfr. Part No.1SVR550851R9400
BrandABB
$108.89
Each
units
- DIN Rail Mount, Screw Mount, Snap-On 30V ac 220 → 240 V ac 88.5mm 22.5mm 78mm - - - - - - -
RS Stock No. 144-0874
Mfr. Part No.K7L-AT50DPB
BrandOmron
$722.61
Each
units
1 Plug-In 24V dc 12 → 24 V dc 12.8mm 28.8mm 46mm - -10°C +55°C - - - Voltage
RS Stock No. 465-0766
Mfr. Part No.MK9151N.12 2-450kOHM DC24V 0.2-20s
BrandDold
$257.94
Each
units
1 DIN Rail Mount 10V ac 24 V dc 90mm 22.5mm 98mm - -20°C +60°C - - - -
RS Stock No. 135-6324
Mfr. Part No.1SVR730850R2200
BrandABB
$200.06
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
RS Stock No. 892-9766
Mfr. Part No.3491L1P6I1
BrandRosemount
$1,273.73
Each
units
1 Wall Mount 230/115Vac selectable 115 V ac, 230 V ac 213mm 185mm 84mm - -40°C +55°C 4 → 20 mA, 200 (Fuse) mA ATEX IP65 Current, Voltage
RS Stock No. 124-0114
Mfr. Part No.LI40-1001
BrandFlowline
$381.03
Each
units
1 Panel Mount - - 85.5mm 78.6mm 17mm - -20°C +60°C - - IP65 Sensor
RS Stock No. 768-2075
Mfr. Part No.MET381.CX
BrandVega
$1,189.07
Each
units
- - - - - - - - -20°C +60°C - ATEX - -
RS Stock No. 135-6330
Mfr. Part No.1SVR740850R2200
BrandABB
$214.01
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
RS Stock No. 135-6323
Mfr. Part No.1SVR730850R2100
BrandABB
$193.16
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
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