- Brand: Michell Instruments
Tags: QMA401, Michell, Instruments
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
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) |
