Issue Date: November 22, 1995
Revision Date: March 10, 2000
PermAlert
PAL-AT Models AT20C, AT50C, AT40K with AGW Sensor Cable, TFH Hydrocarbon Sensor Cable
Out-of-Tank Product Detector (Liquid-Phase)
Detector
| Output Type | Qualitative |
|---|---|
| Sampling Frequency | Continuous |
| Operating Principle | Impedance change |
Test Results
| Unleaded Gasoline | |||
|---|---|---|---|
| 1/3 MER* | 2/3 MER | MER | |
| AGW Sensor Cable | 1348 ft. | 2644 ft. | 3982 ft. |
| Response time (min) | 9.92 | 6.25 | 21.28 |
| Recovery time (min) | 1.0 | 1.0 | 1.0 |
| Product activation height (cm) | 2.03 | 1.13 | 5.00 |
| Detection length (cm) | 116.3 | 64.8 | 286.1 |
| Lower detection limits (cm) | |||
| Product activation height | N/D* | N/D | 5.1 |
| Detection length | N/D | N/D | 295.6 |
| Unleaded Gasoline | |||
|---|---|---|---|
| 1/3 MER | 2/3 MER | MER | |
| TFH Hydrocarbon Sensor Cable** | 1368 ft. | 2685 ft. | 4046 ft. |
| Response time (min) | 3.40 | 7.48 | 16.21 |
| Product activation height (cm) | 0.65 | 1.33 | 3.53 |
| Detection length (cm) | 27.7 | 56.8 | 150.4 |
| Lower detection limits (cm) | |||
| Product activation height | N/D | N/D | 3 |
| Detection length | N/D | N/D | 152.9 |
** California regulations require sensors to be tested annually to verify proper operation. The detector is not reusable and must be replaced after contact with hydrocarbons.
Specificity Results (in addition to above)
Activated: synthetic gasoline, diesel, heating oil #2, water (AGW Sensor Cable only).
Comments
System can monitor interstitial spaces.
Evaluations also covered quantitative leak location.
AGW Sensor Cable is reusable.
TFH Hydrocarbon Sensor Cable is not reusable.
Lower detection limit is calculated at MER only. Cable is assumed to be equally or more sensitive at shorter lengths.
- PermAlert
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Niles, IL 60714
Tel: (847) 966-2235
Email: marketing@permalert.com
URL: www.permalert.com - Evaluator: Carnegie Mellon Research Institute
Tel: (412) 268-3495
Date of Evaluation: 01/17/92, 02/11/92
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