Moisture Analyzer AquaVolt+™

Moisture Monitoring AquaVolt+™

The AquaVolt+™ provides precise, on-line moisture monitoring for ultra-high-purity applications, such as semiconductor manufacturing, specialty gas applications, mobile cart applications, and research and industrial labs.

Principle of Operation
Based on Faraday's Law of Electrolysis, the AquaVolt's sensor absorbs and electrolyzes moisture at fractional parts-per-million or parts per billion (ppm or ppb). 100% of the sample moisture is absorbed by a phosphorus pentoxide (P2O5) film that covers two spirally-wound electrodes embedded in a hollow glass tube. When the sample gas enters the cell at a known flow rate, the film absorbs all the moisture molecules present. By applying an electrical potential (voltage) to the electrodes, each absorbed water molecule is electrolyzed, generating a finite current. This current is precise and proportional to the amount of absorbed water. It is a direct measurement of the water vapor present in the sample gas.

The AquaVolt Line provides precise, on-line for:
  • European Pharmacopoeia requirements for moisture analysis in medical gases
  • Industrial process gases in production
  • Industrial gas at various stages of product purification
  • Trailer and cylinder filling operations
  • Instrument air used in pneumatic systems
  • Shielding gases used in welding
AquaVolt+ Specifications:
Operating range:0.035-20 ppmV in Inert Gases.
Please inquire regarding performance in other gases
Detection Limit (LDL):35 ppbV
Accuracy (greater of):5% of reading or 35 ppb,
whichever is greater **
Ambient Temperature:0C to +60C
Gas Connections:1/4" VCR Inlet 1/8" Compression outlet
Inlet Pressure:10-3000 psig
Flow rate:@1.1 liter/min combined sample and bypass
DIMENSIONS19" x 17" x 7" (48.3 cm x 43.2 cm x 17.8 cm)
WEIGHT25 lbs. (11.34 kg)
Alarm Indicators:One (1) System Alarm
One (1) Flow Alarm
Two (2) User Adjustable Moisture Level Alarms
Power requirement:100-240 vac, 50/60 Hz
* For pure O2: 10% of reading/3 ppm, whichever is greater
** For pure O2 or air: +/- 100 ppb or 20%, whichever is greater
© 2022 Rainer Lammertz