Model 200

The Model 200 uses a sophisticated, microprocessor-based circuit to measure from atmosphere to hard vacuum using a rugged,  inexpensive, thermocouple vacuum gauge tube.

The Model 250WT LCD uses a combination thermocouple/transducer sensor.  It combines the range of a thermocouple with the accuracy of a capacitance manometer, far surpassing convection-based wide range gauges, for a price only modestly higher than a thermocouple. It has a character type liquid crystal display.  Its accuracy is better than 1/2 % +/- torr at pressures above 20 torr.

Because they are microprocessor based, they can have sophisticated features, including RS-232 output, control output, and a backlit LCD character display.

They can be adapted to any kind of vacuum transducer including the Edwards AIM series of Ion gauge transmitters.  (The Model 200 is considerably lower in cost!)

Special versions of the Model 200 can use the Granville-Phillips Convectron ^™ wide-range gauge tube.

The Model 200 and all other wide-range thermocouple and Piraini gauges rely on convection (a form of thermal conduction) to achieve their wide range with a thermal sensor. As such, they are sensitive to the gas species.  For filling applications, transducer gauges, such as the Model 100(P)/760, are preferred.

The Model 200 is normally used as a bench-top gauge, but it can be panel mounted. A special adapter is also available which will allow 5 of the gauges to be mounted in a 19" instrument rack.

For a panel-mounted wide-range instrument in a conventional black plastic case, refer to the Model 100P/200P or the 801w.

The Model 200 is powered by 115 to 230 Volts, AC or 5 volts DC.

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