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. 135-6328
Mfr. Part No.1SVR730850R0300 CM-ENS.31S
BrandABB
SGD253.63
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. 892-9340
Mfr. Part No.3493L1P7I1
BrandRosemount
SGD3,026.87
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. 135-6325
Mfr. Part No.1SVR730850R0100 CM-ENS.11S
BrandABB
SGD174.35
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. 884-2464
Mfr. Part No.4431AD1
BrandGIC
SGD90.42
Each
units
- - - 400 V ac - - - 0 → 10s -10°C +60°C - - - -
RS Stock No. 135-6324
Mfr. Part No.1SVR730850R2200 CM-ENS.23S
BrandABB
SGD180.57
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. 804-3945
Mfr. Part No.7ML5050-0AA11-1DA0
BrandSiemens
SGD1,986.13
Each
units
2 Panel Mount - 10 → 32 V dc, 100 → 230 V ac 190mm 144mm 155mm - -20°C +50°C - - - -
RS Stock No. 889-1532
Mfr. Part No.LI55-1011
BrandFlowline
SGD1,054.22
Each
units
- - - 85 → 265 V ac - - - - -40°C +60°C 3 A - - -
RS Stock No. 206-7060
Mfr. Part No.CR - 222 22E
BrandVega
SGD1,051.52
Each
units
1 Wall Mount 27V 100 → 230 V 200mm - 76mm - -40°C - 5 W - IP65 Voltage
RS Stock No. 135-6333
Mfr. Part No.1SVR740850R0200 CM-ENS.21P
BrandABB
SGD193.16
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. 386-8556
Mfr. Part No.202995/00-91/000
BrandJumo
SGD380.34
Each
units
3 - - - 66mm - - - -10°C +60°C - - - -
RS Stock No. 144-0875
Mfr. Part No.K7L-UDPB
BrandOmron
SGD679.40
Each
units
1 Plug-In 24V dc 12 → 24 V dc 12.8mm 28.8mm 46mm - -10°C +55°C - - - Voltage
RS Stock No. 884-2451
Mfr. Part No.4411AD1
BrandGIC
SGD57.24
Each
units
- - - 110 V ac - - - 0 → 10s -10°C +60°C - - - -
RS Stock No. 144-9334
Mfr. Part No.84800054
BrandXylem
SGD1,550.07
Each
units
10 Panel Mounted 10V ac 240 V ac 96mm 96mm 130mm - -10°C +60°C 800 μA - - -
RS Stock No. 780-0292
Mfr. Part No.SB20
BrandCynergy3
SGD138.53
Each
units
1, 2, 3 DIN Rail Mount - 240 V ac, 415 V ac - - - - 0°C +50°C - - - -
RS Stock No. 348-7927
Mfr. Part No.MXL-10.115/RS
SGD184.84
Each
units
2 DIN Rail Mount 12V ac 24 V ac, 115 V ac 104mm 22.5mm 80mm - -20°C +55°C - - - -
RS Stock No. 889-1536
Mfr. Part No.LI55-1201
BrandFlowline
SGD1,058.72
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. 818-4276
Mfr. Part No.61FGPN224ACCE
BrandOmron
SGD138.01
Each
units
1 DIN Rail Mount 8V ac 24 V ac 49.4mm 38mm 80mm - -10°C +55°C - - - -
RS Stock No. 348-7911
Mfr. Part No.MXL-10.924/RS
SGD180.10
Each
units
2 DIN Rail Mount 12V ac 24 V dc 104mm 22.5mm 80mm - -20°C +55°C - - - -
RS Stock No. 446-2632
Mfr. Part No.MCU901WX-A
SGD1,512.04
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. 768-2075
Mfr. Part No.MET381.CX
BrandVega
SGD1,116.14
Each
units
1 Panel Mount - - - - - - -20°C +60°C - ATEX - Current