Specifications:
The document outlines specifications for two models of personal gas monitors: XC-2200 and XS-2200. Both models use electrochemical cell sensors and diffusion sampling methods. The XC-2200 detects carbon monoxide (CO) with a measuring range of 0-300ppm, while the XS-2200 detects hydrogen sulfide (H2S) with a range of 0-30.0ppm. Both models have a resolution of 1ppm for lower ranges and higher increments for extended ranges.

Features:
Both models can operate continuously for up to 5,000 hours and include features such as a loud buzzer, alarm lamp, peak hold function, and time-weighted average (TWA) gas concentration display. They are designed to be thin and lightweight and offer optional gas calibration kits.

Alarm and Display:
The devices feature an LCD with manual backlight, and alarm modes include a buzzer, flashing red light, and vibrator. Alarm set values for the XC-2200 are 50ppm and 150ppm, while for the XS-2200, they are 10.0ppm and 15.0ppm.

Operating Conditions:
Both models operate within a temperature range of -10℃ to 40℃ and a relative humidity of 30-90% RH (non-condensing). They are powered by a single AAA alkaline dry cell.

Additional Functions:
Additional functions include remaining battery level indication, peak hold, memory of peak value, and various alarm functions excluding gas alarms, such as sensor malfunction and zero-adjustment malfunction.