QMA401 Michell trace moisture analyser

Description

The QMA401 Michell trace moisture analyser is designed to provide reliable, fast and accurate moisture content measurement in a wide range of applications.

Provides real-time and accurate trace moisture measurements. This consistency is achieved by a self-calibration system that adjusts the sensor according to the internal humidity generator. The QMA401 Moisture Content Analyser is supplied with calibration traceable to NPL and NIST. This ensures long-term stability of the measurements. Due to these features, the moisture analyser requires very little maintenance, thus avoiding unnecessary costs.

The QMA401 is suitable for use in natural gas applications containing up to 20% hydrogen without the need for additional adjustments.

Technical features QMA401

• Measuring technology: Quartz Crystal Microbalance
• detection limit: 0,1 ppmV
• response time: T63 < 2 minutes for a change in either direction or T95 < 5 minutes for a change in either direction
• fast response times for dry-to-wet and wet-to-dry transitions
• easy, affordable on-site maintenance with long service intervals
• automatic calibration: the internal source of the moisture generator is calibrated with NPL and NIST traceability
• the user can replace the dryer in 10 minutes
• intuitive user interface
• Ethernet or USB communication
• data logging on SD card
• Power supply: 85 … 264 V AC, 47/63 Hz
• optional treatment of the internal sample and bypass loop
• alarms: 1 x system alarm for de-energised switchover and 3 x process alarms, selectable for different parameters, de-energised switchover

Areas of use, applications

• production of high purity gases
• air separation plants
• cleaning of the semiconductor CVD chamber
• semiconductor core chambers
• H2 refrigerant for aggregates

Special features

The analyser’s technology consists of a new generation of precision crystal oscillators, which ensures high accuracy in moisture measurements. They are completely insensitive to changes in the background composition of the gas.