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Issue
Date: August 10, 2001
Preferred
Utilities Manufacturing Corporation
TG-EL-D3
Controller with HD-A1 Sensor
INTERSTITIAL DETECTOR (LIQUID-PHASE)
Detector:
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Output
type: |
qualitative,
discriminating |
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Sampling
frequency: |
continuous |
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Operating
principle: |
optical
sensor, electrical conductivity |
Test Results:
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|
unleaded
gasoline
|
diesel
|
water
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HD-A1
|
|
|
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Detection
time (sec)
|
<1
|
<1
|
<1
|
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Fall
time (sec)
|
<1
|
<1
|
<1
|
|
Lower
detection limit (in)
|
0.179
|
0.162
|
0.190
|
Specificity
Results:
Manufacturer claims the sensor
responds to any liquid after the sensor’s threshold is exceeded.
The sensor display on the controller indicates whether product is oil or
water. No additional liquids
tested.
Manufacturer’s
Specifications:
Manufacturer states that the HD-A1 leak
sensor used with the TG-EL-D3 controller and a tank level sensor (TG-EL-LF,
TG-EL-VF, or TG-EL-WF) is a system that is generally applied to oil tanks for
boilers and emergency generators.
Comments:
This system is NOT sold for retail
gasoline station applications.
Manufacturer
recommends a periodic test for the system by the user.
The test entails placing a magnet near the HD-A1 transmitter/sensor.
When the magnetic “Test Switch” is activated, it simulates an oil
leak. This completely tests the wiring to the sensor, the optical
detector, the HD-A1 transmitter electronics, and the controller.
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Preferred Utilities
Manufacturing Corporation
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Evaluator:
Ken Wilcox Associates
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31-35 South Street
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Tel: (816) 443-2494
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Danbury, CT 06810
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Date of Evaluation:
10/12/00
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Tel: (203) 743-6741
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E-Mail: DCosgrove@preferred-mfg.com |
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URL: www.preferred-mfg.com |
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