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UST Program - LG 113

Issue Date: August 23, 1999
Revision Date: March 10, 2000

Caldwell Systems Corp.

Tank Manager Liquid Sensor, Version TMLIQ

INTERSTITIAL DETECTOR (LIQUID-PHASE)

Detector:

Output type:	qualitative
Sampling frequency:	continuous
Operating principle:	ultrasonic

Test Results:

Horizontal Position	unleaded gasoline	diesel	water
Response time (sec)	<1	<1	<1
Recovery time (sec)	<1	<1	<1
Lower detection limit (cm)	1.28	1.30	2.43
Precision - standard deviation (cm)	0.05	0.06	0.25
Vertical Position
Response time (sec)	<1	<1	<1
Recovery time (sec)	<1	<1	<1
Lower detection limit (cm)	8.56	7.59	9.27
Precision - standard deviation (cm)	0.22	0.11	0.44

Specificity Results:
Evaluator claims sensor will detect fuels or other liquids.

Comments:
Sensor is designed to alarm only when liquid is present from one end of sensor to the other. Therefore, sensor orientation (vertical or horizontal) will effect lower detection limit.
Sensors are reusable.

Caldwell Systems Corp.	Evaluator: Ken Wilcox Associates
600 South Sunset Street, Unit D	Tel: (816) 443-2494
Longmont, CO 80501
Tel: (303) 684-8436	Date of Evaluation: 11/09/98

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