Prior to the release of the AMI Watchdog, competitive low cost solutions consisted of either a two-wire transmitter or an O2 sensor and cellblock. Both are inadequate by themselves since they lack an essential sample system and basic electronic components. A trace oxygen analyzer is a great leak detector; inadvertently adding substandard valving and fittings after the purchase of such a device can create minute leak paths into the analyzer, which can cause disastrously misleading results.

This is why AMI goes the extra distance with our patented cellblock technology.

AMI's patented cellblock begins with a single compact metallic block that undergoes a complex machining process, followed with corrosion-resistant nickel plating. The block contains a series of drilled intersecting gas passages and mounted directly on it are: a custom designed flow control valve, 3-way selector valve (for sample/span/shut off control), flow meter and 3 gas connection fittings. All become an integral part of the cellblock.

This eliminates the techniques used by competitors of piecing several lengths of tubing between numerous compression fittings, valving and a flow meter. In using this approach, they add many potential leak paths, increase response times and the need for additional space.