VD84 – Vacuum Insulation of Liquid Gas Tanks
Compact Vacuum Meter ● external Pirani ● 100 to 1e-3 mbar
The versatile VD84 digital Pirani vacuum meter with external, exchangeable sensor head (VSP841 or VSP842) reads absolute pressure in the fine vacuum range. It is equipped with USB interface and can be used as data logger.
Vacuum insulation of liquid gas tanks protects the liquified gas from the influence of ambient heat. The vacuum envelope effectively prevents heat conduction between the tank and its environment.
Challenge
To assure correct functioning of the insulation and detect leakage in the gas tank or the outer shell as soon as possible, the insulating vacuum is regularly checked. Failure of the vacuum insulation runs the risk of the contents heating up with consequent rise in pressure.
Solution
Using a VD84 vacuum meter with detachable sensor head VSP841 the insulating vacuum of a gas tank can be checked easily and quickly. Each gas tank is equipped with a separate sensor, which remains fixed at the insulation envelope. The vacuum meter is periodically connected to those sensors so that the vacuum can be checked
References
Top-ranked companies on the gas market use Thyracont mobile vacuum gauges for this and other applications in this field
Specifications
| Weight | 1.1 kg |
|---|---|
| Dimensions | 25 x 16 x 9 cm |
| Measurement principle | Heat conduction Pirani |
| Gas dependency | depending on gas type |
| Measurement range mbar | 100 – 1e-3 mbar |
| Measurement range Torr | 75 – 1e-3 Torr |
| max. overload | 4 bar abs. |
| Accuracy | 100 – 20 mbar: |
| Resolution | 100 – 10 mbar: 1 mbar | |
| Measurement rate | 1.0 s |
| Logging rate | 1 … 6000 s |
| Materials in contact with vacuum | Stainless steel 1.4307, tungsten, nickel, glass |
| Operating temperature | +5…+50 °C |
| Storage temperature | -20…+60 °C |
| Voltage supply | 9 V battery or 12…15 VDC external |
| Power consumption | Approx. 110 mW (clocked) |
| Operating time | Li-battery: |
| Serial interface | Mini-USB, Type B, 5pin, female, Virtual Com Port protocol |
| Electrical connection | Mini-jack 2.5 mm for plug-in power supply |
| Article Number (choice of vacuum connection): | 1/8″ NPT male thread (VD84/2), DN 16 ISO-KF (VD84/1) |
| Display | LCD 12 mm |
| Dimensions | 60 x 120 x 25 mm |
| Protection class | IP40 |
| Weight | 200 g (battery included) |
