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The Edwards APG, is a Pirani vacuum gauge and gauge controller in a single compact unit. The measurement range of the APG-M and of the corrosion-resistant APG-MP is 100 to 1 x 10-3 mbar: the range of the APG-L is 10 to 1 x 10-4 mbar. All of the gauges will indicate pressures up to 1000 mbar at reduced accuracy. The APG requires a 20 to 36 V d.c. power supply: it has a 2 to 10 V d.c. analogue output which is related to pressure. The APG is compatible with all of the Edwards AGC’s (Active Gauge Controllers) and with the appropriate versions of the Edwards AGD’s (Active Gauge Displays). Alternatively, you can use an independent power supply for the APG and you can read the Edwards APG output signal with a voltmeter or an analogue- to-digital converter.

An 8-way electrical connector socket on the APG is used to connect the APG to your AGC, AGD or electrical supply and voltmeter. Electrical cables fitted with suitable connector plugs are available as accessories. A gauge identification signal is available on the electrical connector: this signal is used by Edwards AGC’s to identify which type of Active gauge is connected, that is one of the following types:

• APG-M/MP
• APG-L