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Edwards (formerly BOC Edwards) Vacuum Gauges and Vacuum Calibration

Edwards Vacustat McLeod Gauges

1 to 10^-3 mbar

Edwards Vacustat Model 1

Miniature McLeod gauge
Simple operation
Bench, panel or system mounting (model 2G)

The BOC Edwards range of vacuums gauges is a family of three miniature McLeod gauges designed for general laboratory or industrial duties.
The gauge is normally positioned with the measuring capillary and scale horizontal. To take a measurement, the head is rotated through 90 degrees around its rotary seal to bring the tube and scale upright. The rotation causes the mercury to move within the glassware and isolate a fixed volume of the gas whose pressure is to be measured. The trapped gas is then compressed into the closed capillary tube. When the mercury in the open capillary is level with the zero mark on the measuring scale, the system pressure is given by the height of the mercury column in the closed capillary against the scale (which is calibrated direcly in mbar).

Edwards Vacustat Model 1: can be free-standing or panel mounted, measures from 10 to 10-2 mbar

Edwards Vacustat Model 2: can be free-standing or panel mounted, measures from 1 to 10-3 mbar

Edwards Vacustat Model 2G: is a lightweight glass gauge for mounting direcly to the vacuum system. Measures from 1 to 10-3 mbar

Edwards Vacustat McLeod Gauges

Edwards Vacustat Model 2G

Edwards Vacustat McLeod Gauges

Technical Data

Range
Model 1 10 – 10^-2mbar
model 2, model 2G 1 – 10^-3 mbar

Mercury charge
Model 1 97g
model 2, model 2G 140g

Weight without mercury
Model 1, model 2, 900g
model 2G 85g

Dimensions
Model 1 and model 2 fascia 105 x 180 mm
Model 1, model 2 height 220 mm
Model 2G 87 x 159 mm

Clearance needed for rotation
Model 1 and model 2 110 mm
Model 2G 95 mm

Vacuum connection
Model 1, model 2 BOC Edwards SC5
Model 2G B14 (male)

Edwards Vacustat McLeod Gauges

Ordering information

A mercury charge is not supplied with these items and is not available from BOC Edwards.

Edwards Vacustat McLeod Gauges Vacuum Product	Edwards Vacustat McLeod Gauges Ordering Number
Vacustat Model 1 Vacustat Model 2 Vacustat Model 2G Model 1 and Model 2 supplied with: SC5 'O' ring, 'O' ring carrier and nut, nozzle adapter for 7mm bore rubber tube. Model 2G supplied with b14 cone (Female) and retaining clip. Edwards Vacustat McLeod Gauges Spares Gauge head glassware Vacustat Model 1 Vacustat Model 2 Vacustat Model 2G	D06313000 D06314000 D06405000 D06301001 D06303001 D06402001