Issue Date: November 22, 1995
Revision Date: March 10, 2000
FCI Environmental, Inc.
Analog Hydrocarbon Probe AHP-100, Digital Hydrocarbon Probe DHP-100
Out-Of-Tank Product Detector (Vapor-Phase)
Detector
| Output Type | Quantitative |
|---|---|
| Sampling Frequency | Continuous |
| Operating Principle | Fiber optic |
Test Results (for tests conducted with 1000 ppm test gas):
| Unleaded Gasoline | Synthetic Gasoline | Xylene | Benzene | 2-methylbutane | |
|---|---|---|---|---|---|
| AHP-100 | |||||
| Relative accuracy* (%) | 12 | 22 | 2 | 35 | N/R |
| Bias (%) | -7 | -2 | 1 | -23 | N/R |
| Precision (%) | 4 | 15 | 1 | 11 | N/R |
| Detection time (min) | < 1 | < 1 | < 1 | < 1 | N/R |
| Fall time (min) | < 1 | < 1 | < 1 | < 1 | N/R |
| Lower detection limit (ppm) | 137 | 220 | 84 | 519 | N/R |
| DHP-100 | |||||
| Relative accuracy* (%) | 18 | 29 | 0 | 17 | N/R |
| Bias (%) | 1 | -12 | 0 | 17 | N/R |
| Precision (%) | 9 | 10 | 0 | 11 | N/R |
| Detection time (min) | < 1 | < 1 | < 1 | < 1 | N/R |
| Fall time (min) | < 1 | < 1 | < 1 | < 1 | N/R |
| Lower detection limit (ppm) | 73 | 118 | 45 | 280 | N/R |
Specificity Results (%) (corrected for sensitivity differences)
| AHP | DHP-100 | |
|---|---|---|
| Unleaded gasoline | 93 | 101 |
| Synthetic gasoline** | 100 | 92 |
| Synthetic gasoline*** | 98 | 88 |
| JP-4 jet fuel | 105 | 109 |
| Benzene | 76 | 89 |
| Trimethylbenzene | 107 | 104 |
| P-xylene | 101 | 100 |
| Xylene | 103 | N/R |
| Toluene | 96 | 97 |
| Pentane | N/R | N/R |
| Methane | N/R | N/R |
| Butane | N/R | N/R |
| 2-methylbutane | N/R | N/R |
| N-hexane | N/R | 108 |
** EPA March 1990 protocol
*** Radian June 1990 protocol
Comments
1000 ppm tests used a certified blend of concentrated gas to simulate a leak. 10 ppm test used a measured quantity of liquid product to simulate a leak.
- FCI Environmental, Inc.
1181 Grier Dr., Bldg. B
Las Vegas, NV 89119
Tel: (800) 510-3627 - Evaluator: Ken Wilcox Associates
Tel: (816) 443-2494
Date of Evaluation: 03/07/94, 12/05/94
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