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.
V
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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XZR400 Range
The 4 chassis types available offer maximum fl exibility
and ease of use in many different applications.
XZR400-RM
XZR400 rack mount comes in a 3U high, 19” rack mount
chassis and is supplied with 2 off 4-20 mA outputs and
ModBus RS485 as standard.
Oxygen Analyzers
XZR400-WM
XZR400 wall mount
is primarily designed
for cylinder fi lling or
applications where the
analyzer needs to be
mounted as close to the
process as possible.
XZR400-BM
Transportable version with
a carry handle and rubber
feet for use in laboratories
or processes where
multiple sample points are
required.
XZR400-PT
Essentially this is an
XZR400 wall mount in
an aluminium fl ight case
designed to be protected
in transport when moving
between sites.
Available Options for the Range
Each unit comes with a variety of standard and optional features, the table below gives a
quick reference:
Feature XZR400-RM XZR400-WM XZR400-BM XZR400-PT
1st 4-20 mA analog output
2nd 4-20 mA analog output
2 threshold alarms and 1 general fault alarm
RS485 digital output
RS232 digital output (instead of RS485) Option Option Option Option
Integrated pump Option
Pump in a separate housing
Auto adjustment Option Option
Total pressure correction Option Option Option Option
Wilder range beyond 25% Option Option Option Option
Automatic commutation of the scale Option Option Option Option
Contact for abnormal fl ow Option Option Option Option
Option Option Option
Option Option Option
Option
Option
Option
Option
= Standard
= Unavailable
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Oxygen Analyzers
Appendix A Technical Specifi cations
Sensor Type
Measurement Principle
Performance
Gas Clean, dry, oil free with particles less than 3 μm
Measurement Range
Lowest detectable limit (LDL) 0.1ppm(v) O
Accuracy (Intrinsic Error) Less than 2% of reading
Response Time < 11 seconds
Repeatability ±0.1% of reading
Stability 1% per month
Linearity Better than ±1%
Drift <1% of reading per week
Sample Flow Rate 1 to 3 Nl/h with built-in fast loop
Maximum Sample Pressure 2 barg (29 psig)
Maximum Sample Temperature +100°C (+212
Atmospheric Pressure Compensation Built-in as standard
Optional sensor
Moisture sensor Easidew sensor can be fi tted as an option. Please, see a separate datasheet for full specifi cations.
Measurement range -100 °C to + 20 °C
Zirconium Oxide Sensor with Metallic Sealed Reference
and S Type thermocoupe
0.1 ppm up to 25% O
Extended ranges available up to 0 to 100% O
2
2
2
°F)
Sample Flow rate 60 to 300 Nl/hour
Outputs
Analog Output 0, 1 or 2 off 0/4-20 mA Linear with Galvanic Isolation output
Digital Communications Output
Output Load Over 1,000 Ω
Self-Diagnostics Via HMI
Output Ranges
Alarms
Display Resolution
Power Supply 90 to 264 V AC, 47/63 Hz
Power Consumption 50 VA
Modbus RTU over RS485 protocol (Standard on XZR400A1)
RS232 output (optional)
0.0 ppm to 1ppm up to 0 to 25% O
Extended ranges available up to 0 to 100% O2
2 threshold alarms, freely confi gurable
1 general fault alarm including fl ow alarm
1 fl ow alarm (optional)
0.01 ppm between 0.1 ppm and 10 ppm
0.1 ppm between 10 ppm and 10,000 ppm
0.01% between 1 to 10%
0.1% between 10 to 25%
2
Operating Conditions
Ambient Temperature Range 0 to +55°C (+32 to +131°F)
Sensor Temperature Optimized at 634°C
Operating Humidity 5 to 90% RH without condensation
Mechanical Specifi cation
Model Dimensions Weight Gas Connectors Ingress Protection
Rack mount:
Wall mount: 200 x 220 x 290mm 5kg 6 mm IP40
Bench mount:
Transportable:
Sample Gas
Connections
19’’, 3U, 482.5 x 133 x 371.5mm 10kg 1/8" IP20
290 x 260 x 236mm 5.2kg 6 mm IP20
450 x 300 x 330mm 13.5kg 6 mm IP40
All gas connections are Swagelok (MALE) Fittings (316 SS)
Michell Instruments Ltd, Rotronic Instruments Corp. 135 Engineers Road, Suite 150, Hauppauge NY 11788 Tel: 631 427
3898, Email: us.info@michell.com, Web: www.michell.com/us
Michell Instruments adopts a continuous development programme which sometimes necessitates specifi cation changes without notice.
Issue no: XZR400_97204_V10_US_0818
© 2018 Michell Instruments
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