QMA401 Micro Water Analyzer

Michell Company continuously improves its quartz crystal oscillation micro balance technology and has recently developed a new product QMA401. The latest analyzer adopts a new generation of precision quartz crystal sensors to ensure high-precision measurements that are not affected by changes in background gas composition. Even though other humidity technologies perform poorly in the micro water field below 1ppm, the latest product QMA401, which uses industry recognized crystal oscillation technology, can provide high reliability and easy measurement, and greatly reduce maintenance costs for users.

reliability

To ensure high reliability, the main components of QMA401- humidity generator, sensors, and flow control device - ensure precise temperature control. Ensure that the measurement results are not affected by changes in sample gas or ambient temperature. This analyzer uses a mass flow meter to ensure precise control of the flow rate of sample gas and standard gas, with a flow accuracy of no more than ± 0.1 ml/minute. In addition, a pressure sensor is added to ensure that the system can continuously maintain the accuracy of measurement and calculation parameters even when the sample gas pressure fluctuates.

QMA401 Micro Water Analyzerhighlight

• Achieve high-precision measurement within the full range of 0.1~2000 ppmV

• Easy to use, convenient and fast on-site maintenance, low maintenance cost

Accuracy up to 0.1ppmV or 10% of the reading, whichever is greater

• Reliable measurement for changing sampling conditions - automatic adjustment based on changes in sample gas pressure and flow rate

• Not affected by changes in background gas composition

• Long maintenance intervals

It only takes ten minutes to replace the drying cylinder

• Intuitive menu interface

Ethernet or USB digital communication

SD card data recording

• Optional built-in sampling system and bypass

QMA401 Micro Water Analyzerapplication

• High purity gas production

• Air separation enterprises

Semiconductor CVD cleanroom

• Semiconductor etching chamber

• Hydrogen cooling device for generator

Plastic particle drying

Technical Specifications

performance

Quartz crystal oscillator technology with fast response measurement technology

Verification range 0.1~700ppmV

Measurement range 0.1~2000 ppmV

Accuracy 0.1 ppmV (0.1~1 ppmV)

± 10% of the reading (1~2000 ppmV)

Repeatability ± 0.1 ppmV (0.1~1 ppmV)

± 5% of the reading (1~2000 ppmV)

Minimum measurement value 0.1 ppmV

测量单位 ppmV, ppmW, mg/nm3, vapor pressure (Pa), frost point (°C), lb/MMscf

Response speed T63<2 minutes T95<5 minutes

Automatic verification of internal humidity generator

Traceable from NPL to NIST

Sensitivity of 0.1 ppmV or 1% of the reading, whichever is greater

Electrical parameters

Power supply 85~264 V AC, 47/63Hz, 110~300 V DC

Maximum power consumption of 111 W

Alarm 1 x system alarm, no voltage conversion (FORM C)

3 x process alarm, optional parameters, no voltage conversion

(FORM C)

Communication analog output: 4-20 mA or 1~5 V2 options available

Digital communication: RS485/USB Modbus RTU, Ethernet

Modbus TCP

Data recording can be directly recorded onto an SD card or transmitted through PC application software

Display 7 "color LCD touch screen

working conditions

The maximum intake pressure is 1 barg

Optional high voltage version: up to 300 barg

Exhaust pressure atmospheric pressure

Sample gas flow rate 300ml/minute, total flow rate @ atmospheric pressure

Sample gas temperature 0~+100 ° C

Working environment+5~+45 ° C, up to 90% RH

mechanical parameters

Shell 19 "x 4U x 434mm shell

Gas interface 1/4 "VCR (M)

Weight 13.5kg