HygroTrace meter

Moisture measurement in low parts-per-billion (ppb) measurement ranges for ultra-high purity (UHP) gases is critical to a variety of semiconductor, LCD, and other manufacturing processes. The HygroTrace meter uses aluminum oxide technology with a newly patented technique to provide accurate and reliable measurement for 0–100 ppb moisture levels with the sensitivity and speed of response matched only by current technology analyzers that are much larger and more expensive. The device also has the form factor of a transmitter package with the only wetted parts being essentially a flow-through 1/4-in. VCR tee fitting. The HygroTrace package is 80–90% smaller than competitive analyzers and costs 50–70% less. It features a large integrated backlit display, which can be easily read from several feet away. An integral six-button keypad allows users to program the unit for output range and to check performance. The unit is loop-powered using a 20–28-VDC source and provides a 4–20-mA output proportional to a user-programmed range.