Part 2 of this article continues with a list of features that make WIKA Cryo Gauges the leader in liquid level measurement for cryogenic gas tanks.A Pulse oximeter is a device created for the non-invasive measurement of arterial blood oxygen saturation and pulse rate. This innovative assembly combines the reliability and value of a mechanical gauge, along with a host of add-on accessories for greater usability, including remote signal transmission. The rest of the wetted parts and much of the non-wetted parts are also stainless steel for corrosion resistance. The measuring cells are made of a copper alloy (models 712.15.100/160) or 316 stainless steel (models 732.15.100/160). Metal bolsters (6) on either side of the diaphragm protect the gauge against overload and pressure spikes. This deflection, which is proportional to the DP, acts upon a lever mechanism (3) in the indicating case (4) to transmit the information to the movement (5). The differential pressure, or P 1minus P 2, causes the diaphragm to deflect against the measuring range spring (2). An elastic diaphragm (1) divides the two chambers.
Two media chambers, ⊕and ⊖, detect the gaseous (P 1) and liquid (P 2) pressures. With valuable input from major players in the industry, WIKA came up with an engineered solution: Cryo Gauge models 7X2.15.100and 7X2.15.160. Manufacturers of liquefied gases were looking for a compact all-in-one solution. WIKA’s Liquid Level Gauge for Cryogenic Gas Tanks The process was time consuming and labor intensive, and the resulting assembly was often a bulky mass of parts, connectors, and piping.
COST OF GAGET TO GAGE OXYGEN LEVEL IN HUMANS FULL
This meant manufacturers needed a different DP gauge for each type of gas, or use a gauge with three gas scales, of which only the argon scale would go over the full span. Assuming all three are in the same size of tank, the same dial that indicates N 2 at 100% would show a full tank of O 2 at only 70%, and a full tank of Ar at only 57%. N 2 is lighter than O 2, which is lighter than Ar. Let’s take nitrogen, oxygen, and argon as examples. The sensors need to be rugged enough to handle high pressures, yet sensitive enough to indicate a very low differential pressure.Īnother issue is that most DP gauges are limited to one pressure range and, thus, can be calibrated to only one particular gas over the full span. However, most DP gauges have their limitations when it comes to cryogenic gases. This differential pressure value indicates how much product – liquid gas – is left inside the tank.įor transport and storage, medical and industrial gases have to be liquefied.
These systems work by measuring the gaseous (P 1) and liquid (P 2) pressures of the fluid within a tank, and then calculating the differential pressure (DP). Differential Pressure Measurement for Cryogenic Tanksĭifferential pressure gauges are ideal for monitoring liquid levels in closed vessels.
That’s why large gas tanks are found outside every hospital, while smaller facilities – medical clinics, field hospitals, etc. As more people come down with acute cases of COVID-19, healthcare facilities require more oxygen to help patients breathe via medical ventilators. WIKA’s innovative Cryo Gauge is a compact, all-in-one solution that saves manufacturers time, money, and hassle.Ī variety of industries, from hospitals and laboratories to production facilities, rely on a steady supply of oxygen, nitrogen, argon, carbon dioxide, nitrous oxide, and other medical and technical gases. For years, makers of cryogenic equipment have had to fabricate their own differential pressure systems to measure the gas’s liquid level and working pressure.
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