GE Sensing”s HygroTrace moisture meter uses a newly patented technique to provide accurate and reliable measurement for zero to 100 PPB moisture levels with sensitivity and speedy response. Typical semiconductor applications include measurement of moisture in UHP gas delivery and distribution systems and point-of-use moisture measurement protection. Current technologies for low PPB moisture measurement include tunable diode laser absorption spectroscopy (TDLAS), vibrating quartz crystal, and phosphorous pentoxide. However, these technologies typically require a rack-mount instrument package that is relatively large in size and includes complicated parts and temperature control. The HygroTrace meter uses aluminum oxide technology with a patented technique that vastly improves sensor speed of response to provide PPB moisture measurement in minutes. In addition, the meter has the form factor of a transmitter package with the only wetted parts being essentially a flow-through ¼” VCR tee fitting. The HygroTrace package is 80-90 percent smaller than competitive analyzers and costs 50-70 percent less. The meter features a large, integrated backlit display, which can be read from several feet away. An integral six-button keypad allows users to program the unit for output range and to check on performance. The unit is loop-powered using a 20-28 VDC source and provides a four to 20 mA output proportional to a user-programmed range.