A range of trace oxygen analyzers utilizing Michell's Metallic Sealed Reference Sensor (MSRS) technology. Designed to measure O2 as an impurity in pure inert gases such as N2, CO2,, He, Ar and Kr. The XZR400 can also be used for cylinder filling 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, flow alarms and digital communications to match customer needs.

See datasheet for the full specification of the XZR400 Series range.

Product Features

  • 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

Technical Specification

Sensor Type
Measurement Principle Zirconium Oxide Sensor with Metallic Sealed Reference and S Type thermocouple
Gas Clean, dry, oil free with particles less than 3μm
Measurement Range 0.1 ppm up to 25% O2 Extended ranges available up to 0 to 100% O2
Lowest detectable limit (LDL) 0.1ppm(v) O2
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°F)
Atmospheric Pressure Compensation Built-in as standard
Optional sensor
Moisture sensor Easidew sensor can be fitted as an option. Please, see a separate datasheet for full specifications.
Measurement range -100 °C to + 20 °C
Sample Flow rate 60 to 300 Nl/hour
Analog Output 0, 1 or 2 off 0/4-20 mA Linear with Galvanic Isolation output
Digital Communications Output Modbus RTU over RS485 protocol (Standard on XZR400A1)
RS232 output (optional)
Output Load Over 1000 Ω
Self-diagnostics Via HMI
Output Ranges 0.0 ppm to 1ppm up to 0 to 25% O2
Extended ranges available up to 0 to 100% O2
Alarms 2 threshold alarms, freely configurable
1 general fault alarm including flow alarm
1 flowalarm (optional)
Display Resolution 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%
Power Supply 90 to 264 V AC, 47/63Hz
Power Consumption 50 VA
Operating Conditions
Ambient Temperature Range 0 to +55°C (+32 to +131°F)
Sensor Temperature Optimized @ +634°C
Operating Humidity 5 to 90% RH without condensation
Mechanical Specification
Model Dimensions WeightGas connectors Ingress Protection
Rack mount: 19’’, 3U, 482.5 x 133 x 371.5mm 10kg1/8"IP20
Wall mount: 200 x 220 x 290mm 5kg6 mmIP40
Bench mount: 290 x 260 x 236mm 5.2kg6 mmIP20
Transportable: 450 x 300 x 330mm 13.5kg6 mmIP40
Sample Gas Connections All gas connections are Swagelok (MALE) Fittings (316 SS)

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