ULLC2001 – ULTRASONIC LIQUID LEVEL GAS INDICATOR INTRINSICALLY SAFE

Datasheet

How the ULCC2001 Indicator works - The Transducer assembly transmits pulses of acoustic energy. The reverberation caused is dependent on the nature of the container (steel, glass, etc.) and the nature of the fluid, (liquid gas and air), contained within it.

Due to the way that the transducer couples with the surface of the container, most of the power tends to be transmitted at the centre of contact, allowing a fairly precise measure of the point at which the acoustic energy has been launched.

Due to the variable nature of the reverberation, the “tune” control allows us to reduce or increase the amount of received energy in order to get it within the range of sensitivity of the instrument. The returned signal is then rectified and smoothed to give a measure of the signal level.

Using the Comparator to find Extinguisher Gas Levels: The transducer is placed against the cylinder body, 120mm below the calculated liquid gas level, where the extinguisher fill should be certain (normally mathematically calculated). While retaining the transducer at this point the Comparators ultrasonic level is set to around two or three divisions / bars-■■■, by use of the 0-10 Tune Control. This gives a reference level against which the signal at the gas level / air interface is compared.

By slowly sliding the transducer up the cylinder body, we will arrive at the gas level / air interface. At which point the signal will rise sharply, this is visible on the Comparator usually as all 16 divisions / bars-■■■■■■■■■■■■■■■■ and is due to the enhanced propagation of the Surface Acoustic Wave (SAW), across the liquid gas.

The unit also incorporates an ambient temperature sensor; the temperature is indicated on the units display, this is useful for making temperature adjustments to the mathematically calculated level.

ULLC2001 - ULTRASONIC LIQUID GAS LEVEL INDICATOR
TECHNICAL DATA
Technical Specification Datasheet

ACCESSORIES AND SPARES

CONTACT

LINK INSTRUMENTS LTD
The Courtyard
Steepmarsh
Petersfield
Hampshire GU32 2BJ
United Kingdom

Tel +44 (0)1730 897 100
Fax +44 (0)1730 897 103

Email: sales@linkinst.com