Issue Date: November 22, 1995
Revision Date: August 23, 1999
Mallory Controls
Pollulert Probes MD221G/T, MD221G/TRA, MD241R, MD241RRA, MD241G, MD241GRA
Out-Of-Tank Product Detector (Liquid-Phase)
Mallory Controls no longer produces, services, or supports the use of this method.
Detector
| Output Type | Qualitative |
|---|---|
| Sampling Frequency | Continuous |
| Operating Principle | Electrical conductivity |
Test Results
| Unleaded Gasoline | Synthetic Gasoline | JP-4 Jet Fuel | |
|---|---|---|---|
| MD221G/T, MD221G/TRA* | |||
| Detection time (sec) | 4 | 7 | 2 |
| Fall time (sec) | 3 | 4 | 4 |
| Lower detection limit (cm) | 0.08-0.32 | 0.08-0.32 | 0.08-0.32 | MD241R, MD241RRA, MD241G, MD241GRA** |
| Detection time (sec) | 2 | 2 | 1 |
| Fall time (sec) | 1 | 2 | 2 |
| Lower detection limit (cm) | 0.16-0.32 | 0.16-0.32 | 0.16-0.32 |
*Evaluation was conducted using probe FD221G/TRA.
**Evaluation was conducted using probe FD241R.
Specificity Results
Activated: n-hexane, diesel, jet-A fuel, toluene, xylene(s).
Comments
According to manufacturer, probes beginning with "MD" have identical performance as older probes beginning with "FD."
Sensors are reusable.
Manufacturer no longer produces, services, or supports this equipment.
- Manufacturer's previously listed contact information is no longer valid.
- Evaluator: Radian Corp.
Tel: (512) 454-4797
Date of Evaluation: 07/08/91
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