This type of instrument uses thermal conductivity detection principle to detect helium gas and electrochemical primary cell principle to detect oxygen gas. The core detection component is a constant temperature thermal conductivity sensor and electrochemical oxygen sensor with temperature compensation function. The thermal conductivity sensor consists of two chambers, each with an identical thermal conductivity meter. One of the chambers is sealed and filled with reference gas, while the other chamber receives sample gas. The controller converts the difference in thermal conductivity between the reference gas and the sample gas into the current concentration value of the detection sample gas. Electrochemical oxygen sensors are designed to measure oxygen and can be used in various background atmospheres.

The instrument is enclosed in a sturdy desktop casing. Can be placed on a desktop for use, with a handle on the shell for easy movement.

There are different gas path design options to adapt to different high and low pressure gas source detection.

The large LCD displays the detected concentration, as well as information and prompts that appear when using the menu to set and calibrate the instrument. The instrument panel has a self fault diagnosis function. If a fault occurs, the instrument panel will display corresponding fault prompt information.

Optional analog outputs of 0-1V, 0-5V, 0-10V, or 4-20mA, as well as RS232/RS485/HART digital outputs.