Capacitive fuel level sensors


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EPSILON EZ

Fuel level sensor Epsilon EZCan 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.

 

                                                                              

EPSILON EZ
EPSILON EZ

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

 

 

 

Operation temperature range

°С

– 40 … + 75

 

Protection level of measuring head

 

IP68

 

Mode of operation

 

Long-term

 

Measurements

 

 

 

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

Average period of measurement results

sec

0…128

 

Measurement information width

bit

10/12/14/16

level

8

temperature

Estimated vehicle-tilt angle

 

 

 

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

 

 

 

Digital

 

 RS-485 

Between FLS and spark protection unit

Attachment features

 

 

 

Slip-on flange design

 

5 holes Æ4,5 mm

 

Height of a measuring head over a tank top, including slip-on flange, up to

mm

32

 

 

 

Instal program

ES Install V10143

 

 

 

 

Contact details

Address

Novozabarskaya Str. 2/6

Kiev, Ukraine 04074

Email Address

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Phone Number

+38 044 206 69 79

+38 093 887 46 26

Quick Contact