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WATCHDOG Oxygen Sensor
Brand: Advanced Micro Instruments, IncThe AMI Watchdog provides a set of desirable features that are needed for trace oxygen analysis at a remarkably low cost.
On the face of it, you might think that all you really need is the oxygen sensor, an off-the-shelf cell block and a single range amplifier so that you can plug it into your SCADA system or flow computer. What could possibly go wrong?
As many people have discovered, there is more to it than just that - A trace oxygen analyzer is an excellent leak detector.
The tiniest leak, due to improper assembly or incorrect choice of sample system components, will render trace oxygen readings meaningless.
The sample system has to be able to provide a controlled flow both of the measurement sample and a span gas and also allow the sensor to be replaced rapidly (excessive exposure to air can damage or destroy a trace oxygen sensor).
The electronics has to be able to deal with the wide range of possible oxygen readings from under 1 ppm to 20.9% and accurately compensate for temperature variations.
The Watchdog provides all of this – and extensive electronic capabilities - at a very low cost.
Features- Display reads oxygen from 0.05 ppm up to 25.0% with no range changes
- Analog output can be configured to operate over any of ten ranges from 0-10 ppm to 0-25% for best resolution
- Field selectable Analog output - 1-5 V or 4-20 mA, isolated
- Complete sample system built in to AMI’s patented cell block
- Very rapid response time from air to low ppm levels
- Easily replaceable sensor, no tools required
Specifications
Display
- 3-1/2-Digits
Enclosure, Body Material
- Metallic
Power Requirement
- 10-28 Vdc < 50 mA @ 12 Vdc
Process Connection - Other
- 1/4” Stainless Steel Compression Fittings for Sample, Span Gas & Exhaust
Range
- 0 to 1 %
- 0 to 1,000 ppm
- 0 to 10 ppm
- 0 to 10 %
- 0 to 100 ppm
- 0 to 25 %
- 0 to 5 %
- 0 to 50 ppm
- 0 to 500 ppm
Repeatability
- ± 1 % of Range or ± 0.2 ppm of Oxygen, whichever is greater
Wetted Materials
- 316 Stainless Steel