The PHD-4 is able to detect very small leaks in objects that have a slight helium/air pressure inside. It is sensitive to helium concentrations as small as 2 ppm- equivalent to a leak rate of 5x 10-6 atm-cc/sec, far superior to the performance by other means of detecting leaks, such as bubble-testing. The PHD-4 sensitivity relies on Agilent’s proprietary and patented SIPD (Selective Ion Pump Detection) technology. Since it is controlled by a microprocessor, the PHD-4 is easy to use with no training required. All tuning and zeroing are handled automatically. The display can be set to use any of four languages (English, French, German, and Italian).
Tech Specifications
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Lowest detectable helium concentration |
2 parts per million |
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Smallest detectable leak |
5 × 10-6 atm-cc/sec |
|
Response time |
|
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Recovery time (from 50 to 0 ppm) |
|
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Start-up time, including self-check |
3 minutes (approximate) |
|
Power requirements |
12 VDC from battery pack, car battery, or transformer |
|
Transformer power supply |
110-240V 50-60 Hz |
|
Sealed, detachable battery pack |
4 hours of operation with full charge |
|
Ambient storage temperature |
-20 to +60 °C (4 to 140 °F) |
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Ambient operating temperature |
-5 to +35 °C (20 to 95 °F) |
|
Maximum relative humidity |
90% |
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Weight, basic module with battery |
5.7 lbs (2.6 kg) |
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Background suppression (zeroing) |
Automatic |
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Tuning |
Automatic |
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