Aplisens

SMART LEVEL PROBES - SGE-25.SMART

Features:

• Programmable zero shift, range and damping ratio

• 4...20 mA output signal + HART protocol

• Accuracy 0.1%

• Integrated internal overvoltage protection circuit

• ATEX Intrinsic safety

• Special version with Titanium wetted parts ( SGE-25S.Smart)

• Marine certificate DNV

Application

The SGE-25.Smart level probe is applicable to measure liquid levels in tanks, deep wells or piezometers.

Principles of operation, construction

The probe measures liquid levels, basing on a simple relationship between the height of the liquid column and the resulting hydrostatic pressure. The pressure measurement is carried out on the level of the separating diaphragm of the immersed probe and is related to atmospheric pressure through a capillary in the cable.

The active sensing element is a piezoresistant silicon sensor separated from the medium by an isolating diaphragm. The electronic amplifier, which works in combination with the sensor, is additionally equipped with an overvoltage protection circuit, which protects the probe from damage caused by induced interference from atmospheric discharges or from associated heavy current engineering appliances.

Configuration

The following metrological parameters can be configured:

• the units of pressure;

• start and end-points of set range;

• damping time constant;

• inverted characteristic (output signal 20 ÷ 4 mA).

Calibration

It is possible to calibrate the probe in relation to a model pressure.

Communication

The communication standard for data interchange with the probe is the Hart protocol.

Communication with the probe is carried out with:

- a KAP-03 communicator,

- some other Hart type communicators,

- a PC using an HART/USB converter and RAPORT 2 configuration software.

The data interchange with the probe also enables the users to:

• identify the probe;

• read the currently measured hydrostatic pressure value, output current and percentage of measuring range.