BX176 portable single gas detector can make continuous detection to combustible and toxic gases. It is suitable for combustible and toxic gas leakage detection in underground pipe or mines, and keeps the workers safe, prevents the facilities from being destroyed. Key Features 2000 detected records Two alarm level, adjustable Calibration point adjustable STEL alarm and TWA alarm for toxic gases Visual, audible, vibrating alarm Self protection against high concentration combustible gas Low battery alert Data uploading Password management Self-test when power on Self-diagnostic and self correction function