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The capacitance formed by the sensing probe and the water is measured which is directly proportional to the level of water known as ‘Head’. By measuring heads at two points called ‘High Head’ and ‘Low Head’, a difference can be calculated. This difference is ‘Loss of Head’. MPLOH measures the heads in mm and thus a calibration at site might be required. The two sensors digitally send their level values of head heights in digital format over the same set of wires, a shielded cable should be used to assure flawless operation.


Latest RISC core microcontroller technology

‘Heads’ and ‘Difference’ are measured in mm from -400mm to 1500mm. -50.0% to +150.0% is also provided for 4-20mA associated Head / Difference

Multi-purpose 5 digit Seven Segment LED display for best resolution and better viewing from distance

Two wire Pulse Coded Digital communication enabling two sensors to be connected on same pair of wires to the evaluation unit. Supporting as far as 1 KM distance between Sensor and Evaluation Unit with shielded two core cables

Two independent potential-free relays, providing flexibility of selecting six combinations of switching

Galvanically isolated true two wire 4-20mA proportional to 0.0% and 100.0% level is available for remote indication purposes

Two wire implementation solves the malfunction problems that occurs with various PLC 4-20 input interfaces and thus better suits for higher-end automation.

4-20mA loop can handle 700 Ohm loop resistance with internal isolated supply. The loop resistance can be 1K Ohm for external DC Supply of 24 Volts

Mechanical Specifications

Electrical Specifications


W: Cast Aluminium weatherproof IP-67 Stoving enamel painted

Cable Entry

3 X 1/2” BSP / NPT gland brass

Extension (Probe Length)

Pipe SS (Still Well) extended up to 3000mm

Process Connection(Mounting Arrangement)

Threaded Mounting: 1-1/2”, 2” BSP/NPT

Flanged Mounting: As per specification

Wetted Parts

S4: SS-304

S6: SS-316

Power Supply

16VDC @ 5mA derived from Sensor Communication Interface of Evaluation Unit

Measuring Frequency

250Khz to 100Khz

Reverse Frequency Measurement

Operating Temperature

Ambient: 20C to +60C


10 counts per PF


Digitally Encoded Current (8mA – 16mA) Pulse

Input power supply & Outputs

Universal Supply: 90-265 V AC, 50 Hz

24 V DC


03 SPDT Relay outputs

0-100% Display

4-20mA current output

Applications Specifications

Measuring differential level In Open Channel

Water treatment plants

Effluent treatment plants

Filtration stations

Switching Indication

Seven Segment Display

LED for 3 Relay Outputs