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. 331-7547
Mfr. Part No.S1384
BrandAssemtech
$62.57
Each
units
1 - - 12 V dc 64mm 58mm 35mm - -10°C +50°C - - - -
RS Stock No. 884-2451
Mfr. Part No.4411AD1
BrandGIC
$78.53
Each
units
- - - 110 V ac - - - 0 → 10s -10°C +60°C - - - -
RS Stock No. 303-0414
Mfr. Part No.61FGPN8230AC
BrandOmron
$464.91
Each
units
1 DIN Rail Mount 8V ac 230 V ac 84mm 38mm 49.4mm - -10°C +55°C - - - -
RS Stock No. 446-2632
Mfr. Part No.MCU901WX-A
$1,688.50
Each
units
2 Wall Mount 230/115Vac selectable 15 → 30 V dc, 98 → 132 V ac, 198 → 254 V ac 185mm 213mm 84mm - -40°C +55°C - - - -
RS Stock No. 746-7444
Mfr. Part No.1SVR550850R9500 CM-ENE MIN
BrandABB
$143.79
Each
units
- DIN Rail Mount, Screw Mount, Snap-On 30V ac 110 → 130 V ac 88.5mm 22.5mm 78mm - - - - - - -
RS Stock No. 201-0775
Mfr. Part No.CLD1EA1CM24
$167.64
Each
units
1 DIN-rail 5V 24 V 100000mm - - - - - - - - Analog
RS Stock No. 201-0776
Mfr. Part No.CLD2EB1BU24
$162.40
Each
units
2 DIN-rail 5V 24 V 100000mm - - - - - - - - Analog
RS Stock No. 510-9297
Mfr. Part No.61F-GPN-BC 24VDC
BrandOmron
$547.58
Each
units
- DIN Rail Mount 5V ac 24 V dc 84mm 38mm 49.4mm - -10°C +55°C - - - -
RS Stock No. 144-0875
Mfr. Part No.K7L-UDPB
BrandOmron
$728.51
Each
units
1 Plug-In 24V dc 12 → 24 V dc 12.8mm 28.8mm 46mm - -10°C +55°C - - - Voltage
RS Stock No. 386-8556
Mfr. Part No.202995/00-91/000
BrandJumo
$432.85
Each
units
3 - - - 66mm - - - -10°C +60°C - - - -
RS Stock No. 206-7058
Mfr. Part No.CR - 222 223
BrandVega
$854.56
Each
units
1 Wall Mount 27V 100 → 230 V 162mm - 76mm - -40°C - 5 W - IP65 Voltage
RS Stock No. 780-0292
Mfr. Part No.SB20
BrandCynergy3
$166.43
Each
units
1, 2, 3 DIN Rail Mount - 240 V ac, 415 V ac - - - - 0°C +50°C - - - -
RS Stock No. 621-1571
$136.78
Each
units
2 Panel Mount 17V ac 115 V ac, 230 V ac 75mm 48mm 48mm - -20°C +60°C - - - -
RS Stock No. 804-3945
Mfr. Part No.7ML5050-0AA11-1DA0
BrandSiemens
$3,166.79
Each
units
2 Panel Mount - 10 → 32 V dc, 100 → 230 V ac 190mm 144mm 155mm - -20°C +50°C - - - -
RS Stock No. 135-6329
Mfr. Part No.1SVR740850R2100 CM-ENS.13P
BrandABB
$208.33
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. 768-2075
Mfr. Part No.MET381.CX
BrandVega
$1,246.40
Each
units
1 Panel Mount - - - - - - -20°C +60°C - ATEX - Current
RS Stock No. 135-6323
Mfr. Part No.1SVR730850R2100 CM-ENS.13S
BrandABB
$194.69
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. 892-9340
Mfr. Part No.3493L1P7I1
BrandRosemount
$3,380.13
Each
units
1 Panel Mount 230/115Vac selectable 115 V ac, 230 V ac 144.8mm 74.7mm 173mm - -40°C +55°C 4 → 20 mA, 200 (Fuse) mA - IP40 Current, Voltage
RS Stock No. 144-9335
Mfr. Part No.84800056
BrandXylem
$1,836.83
Each
units
10 Panel Mounted 10V ac 24 V dc 96mm 96mm 130mm - -10°C +60°C 800 μA - - -
RS Stock No. 804-3954
Mfr. Part No.7ML5050-0AA21-1DA0
BrandSiemens
$3,403.72
Each
units
2 Panel Mount - 10 → 32 V dc 190mm 144mm 155mm - -20°C +50°C - - - -