This meter is of the volumetric positive displacement type, using a chamber (drum) sealed with liquid (water or oil). As such, almost all types of gas can be measured without influence from relative density, viscosity, etc. Since the structure has no leakage, it can measure minute flow rates and has high reproducibility.
Both measurement drum and case is made of stainless steel as standard; therefore, it has high durability and resistance to corrosion.
This model has been continually improved for a long time; as such, it has stable performance and high durability.
The case is designed for capacity to endure high pressure. It is airtight and has excellent pressure-resistance.
This model uses an over-flow system to provide easy, semi-automatic adjustment of the liquid level. The use of synthetic materials means that this is a compact, light-weight and easily portable meter.
-ST type gas meter (calibration gas meter) is an alternative to the Reference Standard gas meter. This meter does not fulfill the criteria for Reference Standard meters as set out in the Japanese Measurement Law, but is calibrated to equal the Reference Standard meter of Shinagawa Corporation. This gas meter can be used to calibrate gas meters in-house, and can be used in Japan without a specified manufacturing license.
-S type gas meter is a Reference Standard gas meter certified by the Japanese government as conforming to the Japanese Measurement Law. A specified manufacturer license is required to use this in Japan, but such a license is not necessary for overseas use. If used as a Reference Standard meter outside Japan, please ensure that local standards are compatible with Japanese standards, or have the meter certified by local authorities.