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Self-Calibrating Trace Moisture Analyzer - Michell QMA401

Updated:2025-03-13

Brand: Ophir
Model: SF82 Online
Description: 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 appl
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Product Details

Self-Calibrating Trace Moisture Analyzer - Michell QMA401 Description：

Product Manual Datasheet

Low Maintenance Quartz Microbalance Technology

Features

Precision measurement from 0.1 to 2000ppmV

Fast response in both dry to wet and wet to dry transitions

Simple, low cost, on-site maintenance with long service intervals

Dryer can be replaced by the user in 10 minutes

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

Intuitive user interface

Ethernet or USB digital communications

SD card data logging

Optional internal sample handling and bypass loop

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.

Specifications

Performance
Measuring technology	Fast Response Quartz Crystal Microbalance
Calibrated range*	0.1 ... 700 ppm_V
Measurement range	0.1 ... 2000 ppm_V
Accuracy	±10% of reading from 1 to 2000 ppm_V 0.1 ppm_V between 0.1 and 1 ppm_V
Repeatability	±5% of reading from 1 to 2000 ppm_V ±0.1 ppm_V between 0.1 and 1 ppm_V
Limit of detection	0.1 ppm_V
Available units	ppm_V, ppm_W, mg/Nm³, vapor pressure (Pa), dew point (°C/°F), lb/MMscf
Response speed	T63 <2 mins to step change in either direction T95 <5 mins to step change in either direction
Automatic calibration	Internal moisture generator source calibrated traceable to NPL and NIST
Sensitivity	0.01 ppm_V or 1% of reading, whichever is greater
Electrical Specifications
Supply voltage	85 ... 264 V AC, 47/63Hz
Max power consumption	150 VA
Alarms	1 x System alarm, volt-free change-over FORM C) 3 x process alarms, selectable for various parameters, volt free changeover (FORM C)
Communications	Analog Outputs: 2 channels, user selectable 4 ... 20 mA or 1 ... 5 V Digital Communications: RS485/USB Modbus RTU, Ethernet Modbus TCP
Data logging	Direct logging to SD card or PC via application software
Local interface	7” color touch screen LCD
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 without bypass
Sample gas temperature	0 ... +100 °C
Operating environment	+5 ... +45 °C up to 90 % rh
Mechanical Specifications
Enclosure	19” Rackmount, 4U x 434mm
Gas connections	1/4” VCR(M)
Weight	13.5 kg