Michell Instruments XZR400 Specifications

Oxygen Analyzers

XZR400 Series

Oxygen Analyzers

A range of trace oxygen analyzers utilizing Michell's Metallic Sealed Reference Sensor (MSRS)
technology. Designed to measure O
and Kr. The XZR400 can also be used for cylinder fi lling and other applications where a precise
measurement of oxygen is required. There are 4 different chassis to choose from and various
internal options including pumps, fl ow alarms and digital communications to match customer
needs.

as an impurity in pure inert gases such as N2, CO2, He, Ar

2

Highlights

• Fast response time

• Simple and easy operation

• Low maintenance and cost of ownership

• No need for reference air

• Barometric pressure compensation

• Multiple Outputs available from 4-20 mA, RS485
Modbus RTU and RS232

• Rack, wall-mount, bench-mount, and transportable
versions available

• Optional built-in Easidew Transmitter with rack-mount
version

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Applications

• Gas quality measurements

• Environmental control applications

• Control of pure gas for semiconductor and nuclear
industries

• Control of gas purity for industrial gas manufacturers

• Tracing leaks in glove boxes

• Measuring oxygen traces in Carbon Dioxide for
breweries

• Heat-treating applications such as galvanizing
furnaces

• Simulation in laboratories

Oxygen Analyzers

Michell XZR400 Series
Trace Oxygen Analyzers

MSRS Technology

The MSRS (Metallic Sealed Reference Sensor) technology was
developed from a sensor originally designed for ultra harsh
applications in volcanoes. The innovative design with the fast
speed of response and long life-time makes it the technology
of choice for oxygen measurement in a range of applications
such as industrial gas purity.

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In fi eld tests, the drift of MSRS was found to be less than 140
ppb in one month for concentrations of oxygen at 1 ppm.
Compared to other sensors which required weekly calibration,
MSRS technology proved superior.

The XZR400 Series from Michell Instruments is designed
to detect trace oxygen in clean gases, such as nitrogen,
argon, helium, and carbon dioxide, to monitor purity both in
production and when used in processes.

The XZR400 series rapidly detects trace amounts of oxygen. It
is an ideal instrument for detecting leaks and reacts quickly to
avoid costly contamination of the pure product.

The MSRS responds quickly to oxygen
and has a T90 of under 11 seconds.
Another benefi t of having a sealed
reference is that measurements can
be made without a reference gas
and independent of the quality of
the surrounding air. The analyzer
is virtually drift-free, extending
calibration interval time.

Highlights and Benefi ts

Fast response time

Due to its miniature size and unique design, the MSRS
Technology sensor of the XZR400 Series responds to input
changes in less than 11 seconds.

Simple and easy operation

The intuitive touch screen offers two operation levels with
a basic mode for daily work and an expert mode that can
only be used by authorized personnel with an access code

- preventing accidental or unauthorized operation. The
operation follows the NAMUR recommendation.

Low maintenance and cost of ownership

MSRS technology-based sensors have an extremely long life
expectation and are very easy to calibrate using dry air. For
simplicity, Michell offers an optional Auto Calibration facility in
addition to a choice of calibration kits.

Due to the highly stable nature of the sensor, calibration is
only required once or twice a year allowing for signifi cant cost
savings.

No need for instrument air

MSRS Technology based sensors do not require reference
air to be connected to the reference side of the sensor. The
analyzer can be calibrated using just a single reference gas.

High accuracy with built-in pressure compensation

Pressure has a signifi cant infl uence on oxygen measurements.
The XZR400 maintains high accuracy of less than 2% of
reading across the full range due to the built-in atmospheric
pressure compensation (system pressure infl uence can be
compensated via the external pressure sensor input).

Minimal sample requirements

Due to the size and construction of the cell, only 2 l/hr sample
is required – as opposed to other units requiring up to 1 l/min.

Highly stable and drift free

All MSRS technology-based sensors are resistant to pollution
and operate virtually drift free. This positively impacts on both
the maintenance and calibration costs.

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