- Brand: Michell Instruments
Tags: XZR250, Oxygen, Analyzer, Michell, Instruments
A compact zirconium-oxide analyzer to measure percentage level (0-25%) oxygen in
combustion processes. The probe is manufactured from 316 stainless steel and can handle
sample temperatures up to 700°C with an insertion length of 435mm. The sample is extracted
to the sensor chamber and returned to the flue via the Pitot effect, so there is no need for
instrument air. The analyzer uses our microion pump sensor (MIPS) technology and operates
without the need for an air reference.
Product Features
- Measures 0 - 25% O2 in Flue Gas
- Sample temperature up to +700°C
- Barometric pressure and temperature sensors included
- MODBUS as standard
- Single or Dual 4-20 mA outputs
- User configurable relays
- Easy to swap sensor, requiring no special tools
- Sensor exchange program
- Total weight is less than 5kg
Technical Specification
| Performance | |
| Measurement technology | Zirconium Oxide |
| Gas | Oxygen |
| Measurement range | 0.1-25% |
| Output resolution | 0.01 V, 0.01 mA or 0.01% O2 |
| Accuracy | (0.1-25%) < 0.25% O2 |
| Response time | (T90) < 15 seconds |
| Repeatability | < 0.25% |
| Sample Flow Effect | ±0.5% of full scale |
| Sample cell temperature | +700°C (1292°F) |
| Temperature measurement | PT100 |
| Display | 16 Character, 2 Line, with backlight |
| Electrical Input/Output | |
| Power supply | 24 V DC, ±10% (limited power source) |
| Power consumption | 700 mA maximum @ 24 V DC |
| Analog outputs | Single or Dual 4-20 mA |
| Output ranges (oxygen)* | 0-25% O2 |
| Output ranges (temperature)* | -50 - +300°C (-58 - +572°F) |
| Output ranges (pressure)* | 260 - 1260 mbara (0.017 - 0.086psia) |
| Relays | 1 x System alarm (SPST, N/O as standard) 1 x User configurable process alarm (SPST, N/O as standard) |
| Digital communications | RS485 protocol |
| Operating Conditions | |
| Ambient temperature | -20 to +55°C (-4 to +131°F) |
| Ambient Relative Humidity | 0-95% RH |
| Background gas | Combustion gas from natural gas, biogas or oil |
| Sample gas temperature** | +700°C (1292°F) |
| Sample pressure | 260 - 1260mbar Absolute |
| Mechanical Specifications | |
| Warm Up time | < 90 seconds |
| Stabilization time | < 5 minutes |
| Dimensions | 130 x 120 x 150mm (h x w x d) excluding probe |
| Probe dimensions | Nominally 50mm OD with 435mm insertion length |
| Weight: Head | 1.6kg (3.5lbs) |
| Weight: Probe | 2.9kg (Stainless steel: 435mm) (6.4lbs) |
| Wetted materials | Stainless steel, Macor®, aluminum, platinum & PTFE |
| Process connection | 2” 150lbs ANSI flange |
| Ingress protection | IP65 |
| Housing material | Painted aluminium |
| Warning: Sensor gets hot (250°C) allow to cool and do not touch without PPE! | |
| *Temperature and pressure are displayed on the main screen but can also be output via the MODBUS or the second mA output can be configured to either of these parameters. | |
| **Temporary excursions up to 750°C for 30 minutes will not damage the probe. | |
