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Performance Report
UST Program - LG 113

UST Program - LG 113

Issue Date:  May 10, 2004
Revision Date: September 7, 2006

Hectronic GmbH

Optilevel Electronic Level Gauge HLS 3010 HF
(Capacitance Probe)



Leak rate of 0.2 gph with PD = 95.0% and PFA = 5.0%.

Leak Threshold

0.1 gph. 
A tank system should not be declared tight if the test result indicates a loss or gain that equals or exceeds this threshold.


Gasoline, diesel, aviation fuel, fuel oil #4.
Other liquids may be tested after consultation with the manufacturer.

Tank Capacity

Maximum of 20,000 gallons.
Minimum product level required is 25% of the tank diameter.

Waiting Time

Minimum of 2 hours between delivery and testing.
There must be no delivery during waiting time.

Test Period

Minimum of 20 hours.
There must be no dispensing or delivery during test.


Average for product is determined by a temperature-averaging probe.
Temperature is measured by a resistance temperature detector (RTD).
The RTD is mounted in a metal pipe that runs the length* of the probe allowing for temperature averaging.
(*starts about 1 inch above the tip of the probe)

Water Sensor

Must be used to detect water ingress.
Minimum detectable water level in the tank is 1.298 inch.
Minimum detectable change in water level is 0.046 inch.


The probe features 10 measurement segments (10 capacitance segments) and uses a comparison method (self calibration process) which allows the sensor to run without any external calibration. 


Not evaluated using manifolded tank systems. Therefore, this certification is only applicable when there is a probe used in each tank and the siphon is broken during testing.
System consists of a capacitance probe, a micro processing unit inside the head of the probe, and a separate control panel to record and display test data.
Probe was not tested with oxygenated fuels.  However, manufacturer states that probe will work with these types of blended products.
Probe is based on the capacitive comparison method.
Product Level measurements taken by probe are not affected by liquid properties such as density or dielectric constant, electrical resistance, or surface turbulence.
Tests only portion of tank containing product.
As product level is lowered, leak rate in a leaking tank decreases (due to lower head pressure).
Consistent testing at low levels could allow a leak to remain undetected.
EPA leak detection regulations require testing of the portion of the tank system which routinely contains product.

California regulations require at least one test per month after routine product delivery or when the tank is filled to within 10% of the highest operating level of previous month.  


Hectronic GmbH

Evaluator:  Ken Wilcox Associates

Tank und Parksysteme

Tel:  (816) 443-2494

Allmendstrasse 15

Date of Evaluation: 04/06/04

D-79848 Bonndorf, Germany


Tel: +49 (0)7703 93 88 0  
E-mail:  mail@hectronic.com  
URL:  www.hectronic.com/en/  


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