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A Paddle is rotated slowly by a stepper motor. An encoder coupled to the paddle shaft produces electrical pulses during its rotation. The pulses are monitored by a microprocessor to ascertain its movement. Paddle rotation stops when the material covers it. The microprocessor signals the material presence and sends the result in the form of potential free contacts. The microprocessor starts the motor periodically to check the material presence. The paddle flaps and vibrates to discard the clinging material ensuring the material has receded and paddle is now clean. Thereafter the output status is changed and motor starts rotating smoothly again waiting for the level to come.


Suitable for conductive and non-conductive application media

Built in universal supply of 90-260 V AC & 24 V DC

Direct stepper motor drive eliminates gear boxes and clutches

Variable torque control, one paddle suits all applications

Flap action to discard clinging material

2 potential free contacts with adjustable time delay

Fold-able paddle mechanism for ease of installation

Selectable fail-safe operation

Mechanical Specifications

Electrical Specifications


Cast Aluminium weatherproof integral with paddle (IP-67)

Probe Length

150mm to 500mm (Insertion)

Special supporting pipe available for lengths more than 200mm

Cable Entry

2 X 13.5 PG Glands

Ambient Temperature

0 to 80°C

Mounting (Standard)

1-1/2″ BSP / NPT, 50 NB Flange

Wetted Parts

SS 316 / SS 304

Operating Voltage

90-265 V AC & 24 V DC (Universal Supply)


Two sets of potential-free contacts

Power Consumption

3 VA (approx.)

Switching Delay

Available for Covered and Uncoverd situation

Checking Interval

Settable up to 25 Sec, by DIP switch

1s Cover Delay

2s Uncover Delay

Applications Specifications

Chemical powders

Animal feed industry

Plastic chips

PVC powders

Cement powder application

Food processing industry

Pharmaceutical powders

Switching Indication

2 LED’s

Red: Alarm, Green: Normal