Application
Designed for measurement and control of liquid media parameters, including explosive media, during accounting and process operations.

Used in different systems of commercial accounting of petroleum products as well as in different industrial automation systems in oil and gas, chemical, food and municipal industries.

Main operation sites: Oil and gas stations, tank farms, Oil and gas filling terminals and refineries.

Features
transmits processed values of measured parameters
shock-resistant housing made of aluminum alloy or corrosion-proof steel
explosion-proof modification
inverted modification for installation at tank bottom
easy operation and commissioning
transit connection
transport modification for mobile tanks including naval and riverine vessels
chemical-proof modification for liquids with high chemical activity
continuous self-testing
various types of mounting devices for protective cable sheath (metal hose conduit, armored cable, pipe)

Description
The housing is manufactured is alluminium alloy AlSi7 with fluoride oxide electroconductive coating and powder-coated (might be manufactured of stailess steel as per Customer’s request). External grounding clamp, single or two cable entries. Can be completed with various cable protection sheaths fixture units. Electric board with terminals is placed inside the protective housing. The access to the board is provided with removable lid.

Tank fixture fitting is manufactured according to Customer’s requirements.

The sensing element with temperature sensors (up to 8 pcs.) is placed inside stainless steel guide-pipe. Floats (max. 3) travel along the guide pipe. For aggressive media usage floats and protective sheaths of cables might be manufactured of PVDF.

Liquid level measurement is based on magnetostriction effect. A pulse of current is transmitted via acoustic duct made of magnetostrictive material, forming magnetic field around acoustic duct. A pulse of elastic deformation occurs in the place of magnetic float location. Liquid level is determined by time interval required for the pulse to spread. Multi-point measurement of temperature is provided by integral temperature sensors. Density measurement is performed with an additional float, the immersion depth of which depends on liquid density.

The liquid volume is automatically calculated using the calibration table or calibration formulas (for tanks with simple geometrical forms).

Calculation of product weight and volume is executed according to the approved methods.

Specifications
Record in State registry of measurement instruments 24715-14
Measurable parameters of medium
liquid level,m
media interface level (produced water level), m
average liquid temperature, °C
tank infill level, %
liquid volume, m³
product weight, t
product density, g/cm³
main product volume (liquid volume above the produced water level), m³
LPG vapour phase temperature, °C
vapour phase weight, t
liquid phase weight, t
temperature in each measuring point (up to eight measuring points), °C
Guide pipe length, mm from 500 to 6 000
from 500 to 3 000 (modification without upper nonmetering zone)
from 500 to 2 500 (transport modification)
from 500 to 2 000 (inverted modification)
Acceptable main inaccuracy of level measurement, mm ±1
Controlled medium measurement temperature range, °C from -50 to +60
Limits for accepted absolute accuracy for temperature measurement, °C ±0.5 (in range from -40 to +60 °C)
±1 (in range from -50 to -40 °C)
Density measurement range, kg/ m³ from 500 to 1 500
Acceptable absolute inaccuracy for density measurement, kg/m³ ±1 (for petroleum products)
±2.5 (for liquefied petroleum gases)
Monitored media features: temperature, °C from -50 to +60 (for non-freezing)
pressure, MPa, not more than 2.5 1)
density, kg/m³ from 450 to 1 500 (gasoline, diesel fuel, LPG, petroleum, kerosene, odorant, etc.)
Upper / lower non-metering areas, mm, not less than 15 / 25
Limit of relative accuracy for measurement of petroleum products and liquefied petroleum gases weight, % ±0.65 (in range from 0 to 120 tons)
±0.5 (in range from 120 tons and more)
Measurement of media interface level within the entire measurement range
Number of control values of medium parameters (level, temperature, density, volume, weight, etc.) 8
Temperature for operation, storage and transportation, °С from -50 to +60
Water and dust ingress protection degree as per IEC 60529 IP66
Explosion protection marking Ga/Gb Ex db IIB T3
Length of power and signal line, m, not more than length of signal line 1500 (SENS)
1200 (RS-485)
Power supply voltage (Up), V from 4 to 15 (SENS)
from 6 to 50 (RS-485)
Power consumption, mW, not more than 100 (SENS)
400 (RS-485)
Weight without mounting type, kg, not more than 10
Average lifetime, years 15
Note.
1) Exact value is determined in accordance with types of fixture element and floats