explosimeter

An explosimeter is a device which is used to measure the amount of combustible gases present in a sample.

A flashback arrestor is installed in the device to avoid the explosimeter igniting the sample external to the device.

Note, that the detection readings of an explosimeter are only accurate if the gas being sampled has the same characteristics and response as the calibration gas.

Variations on the Wheatstone bridge can be used to measure capacitance, inductance, impedance and other quantities, such as the amount of combustible gases in a sample, with an explosimeter.