UST Programs - LG 113

Issue Date: June 5, 1998
Revision Date: April 8, 2011

Veeder-Root

Dispenser Pan Sensor 847990-001 and Differentiating Dispenser Pan Sensor 847990-002 with
Dispenser Control Interface

INTERSTITIAL DETECTOR (LIQUID-PHASE)

Detector:

Output type:	qualitative
Sampling frequency:	continuous
Operating principle:	product permeable, reed switch/float

Test Results:
*California requires annual certification of all leak detection equipment. The certification of discriminating sensors should include functional testing of both water and product detection capabilities.

Model 847990-002: This sensor can only respond to liquid directly in contact with the detection element, and is unable to detect a product release floating on an existing pool of water whose height exceeds the level of the detection element.

	polymer strip		float switch
	unleaded gasoline	diesel*	water
Dispenser Pan Sensor 847990-001
Detection time (sec)	<1	<1	<1
Minimum product level (in)	1.71	1.66	1.62
Precision (in)	0.006	0.004	0.008
Differentiating Dispenser Pan Sensor 847990-002
Minimum product thickness (in)	0.06	0.06	N/A**
Minimum product level (in)	0.03	0.06	6.39
Precision (in)	N/A***	N/A***	0.008
Detection time (min:sec)	06:30	19:50	<00:01

*Evaluations determined these sensors' responses to the liquids shown above and those indicated in the following section. Biodiesel blends B6-B20 meeting ASTM D7467 and biodiesel B100 meeting ASTM D6751 would also produce an alarm if the sensor threshold is exceeded. Responses to these fuels were not determined, but would be expected to be very similar to the diesel responses.
**See glossary.
***Tested at discrete levels only.

Specificity Results (in addition to above):
Activated: synthetic gasoline, n-hexane, toluene, xylene(s)
Not activated: water (polymer strip only)

Comments:
Sensors are reusable.
These sensors do not require a console.

Veeder-Root	Evaluator: Ken Wilcox Associates
125 Powder Forest Dr.	Tel: (816) 443-2494
Simsbury, CT 06070-2003	Dates of Evaluation: 11/15/93, 11/02/98
Tel: (860) 651-2700

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