| Webster's Online Dictionary |
| Expressions | Domain | Definition | |
| Bell prover | Chemical Industry | A device for testing the accuracy of a gas meter. A quantity of air is collected over water or oil in a calibrated cylindrical bell and then passed through the meter by allowing the bell to sink into the water or oil. A comparison of the measured amount of air passing through the meter and the amount registered on the meter dial gives a measure of meter accuracy. Source: European Union. (references) | |
Source: compiled by the editor from various references; see credits. | Top | ||
