A McLeod gauge is a high-precision vacuum gauge used to measure very low pressures, typically in the range of 10^-3 to 10^-9 torr. The McLeod gauge consists of a glass tube with two bulbs, one connected to the measured vacuum system. The other bulb is used to measure the pressure indirectly by measuring the volume of gas that is evacuated from the first bulb. This is done by isolating the first bulb and then opening a valve that connects it to the second bulb, which has a known volume. As gas is evacuated from the first bulb, the pressure decreases, and the volume of the gas expands to fill the second bulb. The pressure can be calculated from the change in volume using Boyle’s Law.
The McLeod gauge is a highly accurate and precise instrument for measuring low pressures, but it is also a relatively complex and fragile instrument that requires careful handling and maintenance. It is typically used in scientific research, vacuum technology, and other specialized applications requiring high-precision pressure measurement.
Specification
Body: ‘C’ section MS/Aluminium/PVC/PP/FRP/Wooden
End Block: SS304/SS316/BRASS/MS/PVC/PTFE/PP
Connection: 1/4”, 1/2” 3/8”
Connection Type: BSP (M/F), NPT (M/F), Hose nipple and ferrul fitting
Enclosure: Dust proof
| Available in | : | Wall Mounted And Stand Mounted |
| Range | : | 100-0-100 to 1000-0-1000 MM WC/Hg |
| Min. Div. | : | 1 MM WC/Hg |
| Available in | : | Wall Mounted And Stand Mounted |
| Range | : | 0 to 3000 MM WC/Hg |
| Min. Div. | : | 1 MM WC/Hg |
| Available in | : | Wall Mounted And Stand Mounted |
| Range | : | 0 – 5 MM WC/Hg to 0 -150 MM WC/Hg |
| Min. Div. | : | 0.1,0.25 and 0.5 MM WC/Hg depending upon range |
| Available in | : | Wall Mounted And Stand Mounted |
| Range | : | 100-0-100 to 250-0-250 MM WC/Hg |
| Min. Div. | : | 1 MM WC/Hg |
| Available in | : | Wall Mounted And Stand Mounted |
| Range | : | 0 to 500 MM WC/Hg |
| Min. Div. | : | 1 MM WC/Hg |
| Available in | : | Wall Mounted And Stand Mounted |
| Range | : | 0 – 5 MM WC/Hg to 0 -30 MM WC/Hg |
| Min. Div. | : | 0.1, 0.25 and 0.5 MM WC/Hg depending upon range |
Use to measure vacuum at last stage
Ranges:
50-0-50 MM (abs)
100-0-100 MM (abs)
150-0-150 MM (abs)
Use to measure vacuum at last stage
Ranges:
50-0-50 MM (abs)
100-0-100 MM (abs)
150-0-150 MM (abs)
Suitable for measurement of pressures in the range of 10 mm to 10² mm or 10³ mm of Hg. This convenient gauge is a modification of Macleod Gauge. This gauge eliminates the use of a movable reservoir of mercury, and also requires only about 12 cc of mercury for filling. The total size of this gauge is about 9”x6”.