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Electronic Control Units

Mahalaxmi make Electronic control unit in conjunction with level switches can be used for pump control, opening and closing of electrically operated valves, heaters and or high and low level indication.

The electronic unit Model LC1 FL reduces the voltage and converts it to 5 VDC for operation of reedswitches enhancing their life, above all ensuring operational safety. The LED's in the front panel indicates Main Power Supply On, Pump Start and Stop conditions. The start/stop push buttons in the front panel enables testing of the control unit and also manual start and stop. The control unit has a Change over potential free relay output contact-hold on type. Contact change over takes place between High and Low level only. Relay contacts are rated 5 Amps at 230 VAC. Control action can be reversed at site by changing connections from NC to NO.

For certain applications where high and low level indications are required, 2 separate relay output contacts are provided in the control unit-with LED indications for High, Low and Mains on.

Model LC2FL are used in boilers where High and Low Level Contacts are used for Pump start & stop while Very Low Level Contact is used for heater cut off.

Technical Specification


Model No : LC1 FL-HOC

This Controller is used in conjunction with our level switch to Start/Stop pumps or open and close solenoid valve.

Overall Dimension 72 x 72 x 110mm
Mounting Flush Panel / DIN Rail
Panel Cutout 69 x 69
Mains Power Supply 230 VAC / 24 VDC
Input Signal Float Switch Contacts
Output 1 Potential Free c/o contact (Latching)
Contact rating 5 A at 230 VAC Res.
LED Indication Mains On, HL, LL
Optional For High & Low Level Two Separate Relays shall be provided.

Model No : LC1FL-2SR

Overall Dimension 72 x 72 x 110mm
Mounting Flush Panel / DIN Rail
Panel Cutout 69 x 69
Mains Power Supply 230 VAC / 24 VDC
Input Signal Float Switch Contacts
Output 2 Nos. Potential Free Relay contacts
Contact rating 5 A at 230 VAC Res.
LED Indication Mains On, HL, LL
Optional For High & Low Level Two Separate Relays shall be provided.

Model No : MLC-03

Overall Dimension 96 x 96 x 65mm
Mounting Flush Panel
Panel Cutout 94x94
Mains Power Supply 230 VAC / 24 VDC
Input Signal Float Switch Contacts
Output 3 Potential free Changeover Relays with latching contacts
Contact rating 5 A at 230 VAC Res.
LED Indication Mains On, High, Medium & Low

Model No : Mi COMBO

This controller is used in conjunction with conductivity level sensor for starting and stopping pump and heater along with inbuilt timer.

Type Electronic Control Unit For Pump & Heater
Model MI-Combo
Size 72 X 72 X110mm
Mounting DIN Rail
Power Supply 230VAC
Input Conductivity Level Sensor contacts
Output 2 Nos. potential free relay contacts with inbuilt timer. 1 relay for Pump & 1 for Heater.
Relay Rating 5 Amps at 230VAC
Display LED indications for MAINS ON, LL, Pump ON, Heater ON, Dry Run.
Push Button For Reset.

Model No : LC-CT2

This controller is used in conjunction with conductivity levelsensor for starting and stopping pump or opening and closing a solenoid valve.

Type Electronic Control Unit for Conductivity type level switch
Model LC-CT2
Size 72 X 72 X 110 mm
Mounting DIN Rail Mounting
Power Supply 230VAC to controller & 6VDC to sensor,hence ensuring Operational safety
Input Conductivity probes ( Reference,High & Low) 4 levels can be given on request
Output 2 nos. potential free relays for high & low level.
Relay Rating 5Amps at 230VAC
Display LED indications for HL, LL & Mains ON.

Model No : MLC-723

This controller is used in conjunction with 2 nos. cable float switches for underground and overhead tank for pump control.

Type Electronic Control Unit for 2 nos Cable float switches
Model MLC-723
Size 72 X 72 X 65 mm
Mounting Panel / DIN
Power Supply 230VAC to controller & 6VDC to sensor, hence ensuring Operational safety
Input 2 Nos. Cable Float Switches.
Output 1 No. potential free relay contact for Starting & Stopping Pump
Display LED indications for MAINS ON , Overhead Tank –High & Low, Underground Tank - High & Low
Enclosure General Purpose ABS plastic.

Model No : MLI-144 / MLI-146BG

Model MLI-144/ MLI-146BG
Size 96 X 96 X 110mm
Mounting Flush Panel
Display 0.5”, 7 segment Red LED.
Upper Display 0 - 9999 / 0 - 99999
Lower Display mA or % / Bar graph
Power Supply 230VAC
Stabilized supply 24 VDC Built-in for Transmitter.
Input Signal 4-20 mA from level transmitter
Output 2 Nos. potential free relay contacts rated 5 Amps at 230VAC Optional – Additional Relay outputs & 4- 20mA retransmission
Enclosure General Purpose ABS plastic.

Model No : MLC-72F1-FLP

Type Flameproof Electronic Control Unit For Pump On /FF with Auto / Manual selection
Model MLC-72F1-FLP wall mounting
Power Supply 230VAC to controller & 6VDC to sensor, hence ensuring operational safety
Input From Level Sensor – High & Low
Output Latching contacts for Pump On & Off ( Direct Phase for Pump in Auto & Manual Mode)
Display LED indications for MAINS ON, HL,LL, Auto, Manual & Pump On.
Selector Switch Selector Switch
Enclosure Flameproof suitable for GrII A & GrII B

Model No : MLC-04

This controller is used in conjunction with 4 point level sensor. Logic For 4 levels can be given as per customers requirement.

Type Electronic Control Unit for 4 point Level Switch
Model MLC-04
Size 96 X 96 X 65mm
Mounting Flush Panel
Panel Cutout 94 X 94
Power Supply 230VAC to controller & 6VDC to sensor, hence ensuring Operational safety
Input 4 nos SPST Reed switches from 4 levels - Very high , High Low & Ver low.
Output Option 1 - 2 nos. potential free relays with latching contacts Option 2- 4 nos potential free relay contacts
Display LED indications for MAINS ON, L1, L2, L3 & L4 or display names as per customer requirement.
Enclosure General Purpose ABS plastic.

Model No : LLI-10 & LLI-12

This controller is used in conjunction with 4 point level sensor. Logic For 4 levels can be given as per customers requirement.

LED Type Level Indicators Model LLI-10 & LLI - 12
Overall Dimension 48 x 96 x 60 or 110 mm
Mains Power Supply 230 VAC / 12 or 24 VDC
Input Signal 3-wire-Resistance from Transmitter (Resistance Value depends on Range)
Display 3 mm dia LED- 11 nos- 10 for Level and 1 for Power On.
Range 0 to 100%, in 10 equal steps of Height i.e, Millimeters or Litres
Mounting Flush Panel or Projection