Question

In analyzers based on gas density, the unbalance of the bridge is linearly proportional to which of the following?

(a) Temperature of sample detector

(b) Pressure at sample detector

(c) Pressure difference between both the detectors

(d) Gas-density difference between both the detectors

This question was posed to me by my college professor while I was bunking the class.

My query is from Analysers Based on Gas Density topic in section Industrial Gas Analysers of Analytical Instrumentation

Answer 1

The correct choice is (d) Gas-density difference between both the detectors

To explain I would say: In analyzers based on gas density, the unbalance of the bridge is linearly proportional to a gas-density difference between both the detectors. Instruments based on the principle of gas-density balance are commercially available.