QMA401

Trace Moisture Analyzer


The next generation Advanced Quartz Crystal Microbalance analyzer from Michell Instruments is designed to provide reliable, fast and accurate measurement of trace moisture content in a variety of applications where keeping moisture to a minimum is of critical importance.

The analyzer provides consistently accurate measurements of trace moisture. This consistency is achieved using a self-calibration system, which adjusts the sensor with reference to an internal moisture generator. The moisture generator is supplied with a calibration traceable to NPL and NIST, so long term stability of its measurements is guaranteed.


Product Features

  • Precision measurement from 0.1 to 2000ppmV
  • Simple, low cost, on-site maintenance
  • Accuracy of 0.1ppmV or 10% of reading, whichever is greater
  • Reliable measurement even in varying sample conditions — analyzer corrects automatically for flow variations
  • Unaffected by changes in background gas composition
  • Long intervals between maintenance
  • Dryer can be replaced by the user in 10 minutes
  • Intuitive user interface
  • Ethernet or USB digital communications
  • SD card datalogging
  • Optional internal sample handling and bypass loop
QMA401

Technical Specifications

Performance
Measuring technology Fast Response Quartz Crystal Microbalance
Measurement range 0.1 to 2000ppmV
Accuracy ±10% of reading from 1 to 2000 ppmV
0.1 ppmV between 0.1 and 1 ppmV
Repeatability ±5% of reading from 1 to 2000ppmV
±0.1ppmV between 0.1 and 1ppmV
Available units ppmV, ppmW, mg/nm3, vapor pressure (Pa), frost point (°C), lb/MMscf
Response speed T63 <2 mins to step change in either direction
T95 <5 mins to step change in either direction
Sensitivity 0.1ppmV or 1% of reading, whichever is greater
Automatic calibration Internal moisture generator source calibrated traceable to NPL and NIST
Monitor
HMI 7” color LCD with touch screen
Analog outputs 2 channels: user selectable 4–20 mA or 1 to 5 V
Digital communications USB and Modbus TCP over Ethernet
Data logging Direct logging to SD card or PC via application software
Alarms 1 x System alarm, volt-free change-over (FORM C)
1 x Flow alarm, volt-free change-over (FORM C) settable high or low
2 x Level alarm, for ppmV or DP, settable to be active high or low
Power supply 85 to 264 V AC, 47/63Hz
Operating Conditions
Inlet pressure User-controlled to 1 barg
With optional inlet pressure regulator: 300 barg max
Outlet pressure Atmospheric
Sample flow requirement 300ml/min total flow @ atmospheric pressure
Sample gas temperature 0 to +100°C (+32 to +212°F)
Operating environment +5 to +45°C (+41 to +113°F) up to 90% RH
Mechanical Specifications
Case 19” x 4U x 434mm (19” x 4U x 17.08”) Housing
Sample connections 1/4” VCR Swagelok®
Weight 13.5kg (29.8lbs)

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