CLT : Capacitance Type Level Transmitter

Description

Features :

	No moving parts, it is rugged and robust instrument.
	No dead band or dead zone like float based/ultrasonic instruments
	Trim-Pots for span and zero adjustment.
	Plug and play with reference probe and rod. Remote electronics as option with 2 Metre long coaxial cable
	Standard enclosure weather proof-cast Aluminium or Nylon 66. Flame proof as optional.
	Our new introduction is Micro processor based Blind Transmitter (available only in weather proof version) with Push Button Teach-in facility and damping arrangement.
	Suitable for operation from 12 to 32 VDC, with reverse polarity protection. Standard output 4-20mA.Voltage output of 0-10 optional. (For 12 V input supply output 0-5V and with 24 V supply output 0-10V).

Applications :

A capacitance is formed between the probe and the vessel wall.As the level of the measuring medium rises or falls capacitance between the probe and vessel wall changes proportionately. A high frequency sine wave is applied between the probe and tank wall. A change of medium level will induce a change in the current of the applied sine wave. From when the capacitance in the vessel increase, impedance will decrease and current will increase and vice-versa. (Z=Resistance,C=Capacitance, F= Frequency)

Head mounted electronics converts the capacitance variation to 4-20mA signal for long distance transmission. It is provided with trimpots for SPAN and ZERO adjustments. With no moving parts it is free from wear and tear, rugged and robust in construction. No dead zone like float based instruments.

It must be ensured that the probe is parallel to the tank wall throughout it’s length.