Can be used for control of both petrol and diesel fuel level in any fuel tanks and in any vehicles including big fuel tanks and mobile fuellers. EPSILON EZ with an external low-voltage blast barrier has level of explosion proofness of 0 EX ia IIB T6 that guarantees safe operation of the sensor which is in an explosive environment.
Sensor description
Sensor is used for fuel level measurement in cylinders and fuel tanks of vehicles. Sensor can be used with equipment that supports unified communications protocol Epsilon Data Exchange. Measurement of fuel level is provided by a measuring head together with the probe submerged in fuel, which carries out function of the condenser, capacity of which linearly depends on fuel level in tank.
The measuring of the fuel level is provided by the measuring head with the probe, which is immersed into fuel. The probe is a coaxial capacitor formed by an aluminum tube (outer electrode) and insulated copper string (inner electrode). The necessary tension of the string is supported by a spring which is located in a contact connector of the probe.
The mounting of the sensor is performed using self-drilling screws, flange fixing probe (together with a gasket) on the tank. Tightness of the measuring head is provided by O-ring seal located in the front groove.
Protection of the interface cable from mechanical effects is provided by a flexible metal hose.
Safety of the sensor is provided with the application of:
- intrinsically safe measuring circuit with normalized values of voltage, inductance, capacitance and resistance;
- multi-layered security and front-end supply chain;
- metal shell of the measuring head with a proper degree of protection (IP-68 according);
- compound filling the shell of the measuring head.
Modifications
Various modifications of sensors, which differ in ranges of dielectric permittivity of measured liquid, presence of an inclinometer and lengths, are produced.
"Epsilon EZ6" allows operation only in conjunction with spark protection unit "BIZ-EZ".
Spark protection unit "BIZ-EZ" provides explosion protection for sensor of "EZ" model, and data exchange with external monitoring devices via RS-232 or RS-485 interfaces.
Parameters
|
Parameter or characteristics name |
Units of measurement |
Value |
Notes |
|
1 |
2 |
3 |
4 |
|
General |
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Operation temperature range |
° С |
- 40 ... + 75 |
|
|
Protection level of measuring head |
IP68 |
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|
Mode of operation |
Long-term |
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|
Measurements |
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|
Upper limit of level measurement range |
mm |
150 ... 3000 |
|
|
Ranges of permissible reduced error of measurement |
% |
± 1,0 |
|
|
Range of values of relative permittivity of measured liquid (ε) |
- |
1,5-3,3 |
Model EZ6 |
|
1,5 ... 5 |
Model EZ6R |
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|
Average period of measurement results |
sec |
0 ... 128 |
|
|
Measurement information width |
bit |
10/12/14/16 |
level |
|
8 |
temperature |
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|
Estimated vehicle-tilt angle |
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|
Range of the measured values of vehicle-tilt angle |
deg. |
± 75 |
|
|
Minimum grade value of vehicle-tilt angle measurement |
deg. |
0,1 |
|
|
Code length of data presentation |
bit |
16 |
|
|
Power supply |
|||
|
Power voltage, operation range |
V |
+9 ... + 36 |
Nominal |
|
Current consumption, up to |
mA |
250 |
With spark protection unit |
|
Acceptable exposure of impulse voltage through power circuits |
V |
+160, 1 sec -1000, long |
With spark protection unit |
|
Acceptable short-term exposure of potentials difference between signal ground and body of measuring head |
V |
1500 in 1 sec |
With spark protection unit |
|
Interface |
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|
Digital |
RS-485 |
Between FLS and spark protection unit |
|
|
Attachment features |
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Slip-on flange design |
5 holes Æ4,5 mm |
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|
Height of a measuring head over a tank top, including slip-on flange, up to |
mm |
32 |
