Oxygen Analyser

Oxygen Analyser

The Oxygen Analyser measures oxygen concentrations from percentage levels to a fraction of parts per million (ppm) in clean gases. Packaged on a 19â€Â rack mounting enclosure, it uses a oxygen sensor to provide accurate measurement with minimal interference from other gases. The unique cell and heater design gives very fast warm-up times, rapid response, and long sensor life.

Specification of Oxygen Analyser

1. Display

• Multi-digit LCD, character height 12.7mm 

2. Range

• 0.1ppm to 100% oxygen, autoranging 

3. Display resolution

• From 10% to 100%: 0.1%
• From 0.5% to 9.99%: 0.01%
• From 500ppm to 4999ppm: 10ppm
• From 50ppm to 499ppm: 1ppm
• From 5ppm to 49.9ppm: 0.1ppm
• From 0ppm to 4.99ppm: 0.01ppm 

4. Accuracy

• 100% to 100ppm: ±2% of reading or better
• 99ppm to 10ppm: ±1ppm
• 0.1ppm to 9/9ppm: ±0.2ppm 

5. Stability

• Better than 2% of reading or 0.5ppm/month, whichever is greater 

6. Sample flow

• Between 100 and 300ml/min for optimum operation
• Speed of response in clean inert atmospheres
• % levels: less than 0.5s for 90% change
• Levels from 100 to 10ppm: less than 5s for 90% change
• Levels less than 100ppm: less than 30s for 90% change
• When the cell is stabilised/conditioned at low levels, response to changes at that level is of the order of 3 to 4s
• Sample inlet pressure (no pump fitted)
• 10mbar minimum
• 8bar maximum
• Sample temperature (at analyser)
• 100°C maximum
• Sampling system materials
• Materials include: nickel, brass, aluminium, stainless steel, platinum, zirconia, alumina, PTFE and nitrile-rubber
• Sample connection (located on back panel of unit)
• Captive seal compression fitting suitable for 0.25inch (6mm) outside diameter tube

7. Analogue outputs

• Standard: 0 to 5V
• Optional: 4 to 20mA
• Each user-programmable between 0 – 100% to 0 – 5ppm

8. Alarm outputs

• 2 alarms: each user-configurable to OFF, HIGH or LOW status
• Hysteresis programmable from 0 to 10% of set-point
• Volt-free changeover relay contacts rated 48V ac or dc, 0.5A, normally-energised
• Ambient temperature: 45°C maximum

9. Power supply: 110/120V, 50/60Hz at 80VA max, 220/240V, 50/60Hz at 80VA max

10. Mounting: 19â€Â Rack-mounting enclosure 3U high and 270mm deep