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Title: Remote Measurement And Control Instruments
Author: E, H, Hart
Source: 1940 Southwestern Gas Measurement Short Course (Now called ISHM)
Year Published: 1940
Abstract: Every one who is associated with a business concern which rroduces, distributes, or consumes gas is -ivell aware of the inportance of mechanical or electrical devices which pcr- t accurate regulation and measurement of flow, pressure ind temperature. The Bristol Company has cooperated with the ga.s in- iiitrj in solving many of the problems which have arisen 3 the measurement and control of pressure and flow. Many : the earlier applications were of a relatively simple type but as distribution systems were e.ctended the matter of disjiices and time factors became of greater importance and is a result automatic controllers have greater demands placed ipon them. The equipment used for control naturally becomes somewhat more complex hut the benefits dcri-ed easily offset all disadvantages. Remote measurement is accomplished by means of a trans- :2itter which measures the variable condition such as pres- cre or flow, and a receiver which records on a round cliart -he value of that condition for any instant. The transmitter is usually connected to the receiver by two wires or through a telephone circuit.

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