UQD(UQDZ Intelligent) Electric0 pages

UQD (UQDZ Intelligent) Electric Ball Float Liquid Level Transmitter

Summary
UQD series electrical ball-float level transmitters belong to the electrical
type instruments, including
measuring unit and signal transmitting unit. The meter can be classified into 90 ordinary type, 91 big rotating
angle type, 92 external mounting type three types according to measuring unit structure. Also can it be classified
into analog (UQD.A) type and intelligent (UQD.Z) type according to the signal transmitting unit. UQD.Z type
transmitter not only can directly display local liquid level change, but also can it transmit 4-20mA analog signal
on which digital signal being conformity with HART protocol is superimposed. All the transmitters’ head cases
adopt modern fashionable case design and shape beautifully with all the working chambers separated. The meters
are safe and reliable. They widely applies to measure various kinds of liquid level and transmit liquid level change
signal, such as sticky, dirty, explosive, corrosive and other fluid. They are perfect instruments for liquid level
measurement in production process in petroleum, chemical, metallurgy, power industry and light industries.

Principle of Operation
The measuring unit of UQD series electric ball-float liquid level transmitter includes floating ball, balance lever,
balance weights ( these three elements comprise a torque balance device). The floating ball can float up and down
freely with liquid level changing. When the liquid level change, the floating ball position changes correspondingly
and drive the main shaft to rotate through the floating ball connecting rod. The angular displacement sensor in the
case couples with the main shaft via a pair of gears. In this way, the changes of the liquid level can be converted
into electric signal that will be turned into standard current signal in direct proportion by the electronic circuit in
the case.

Main Performances and Qualifications
Performance and qualifications

Analog Meter
( transmitter head)

Intelligent Meter
(transmitter head)

Supplying voltage

24V DC

24V DC

Output signal
Precision class

4

20mA
1.5

Add: No..10 Huanghai Street, Zhenxing District, Dandong City, Liaoning Province, P.R. China
Tel: +86-415-6227343
Fax: +86-415-6227341
Website: http://www.ddtop.com

4

20mA+HART protocol
0.5, 1.0

P.C.: 118000
E-mail: davidsong@ddtop.com