+4 Single Gas Detector-Micro IV - has-environmental.com "micro gig h2s" refers to the GfG Micro IV H2S single gas detector, a portable, single-button device that monitors hydrogen sulfide (H2S) gas levels for worker safety. This robust, compact monitor provides visual, audible, and vibration alarms, features a three-year sensor warranty, and offers over 3,000 hours of operation on a single AA battery. Key Features and Benefits Compact & Robust Design: The GfG Micro IV is designed for harsh environments, with rubber boots to protect against shocks and dust ingress. Simple Operation: Most day-to-day functions are controlled with a single button. Intelligent Sensors: It uses smart, swappable sensors that can be replaced without reconfiguring the device. Alarms: It features configurable high, low, STEL (Short-Term Exposure Limit), and TWA (Time-Weighted Average) alarms with audible, visual, and vibration alerts. Long Battery Life: It delivers up to 3,000 hours of continuous operation from an off-the-shelf AA alkaline battery. Data Logging: Event and data logging are standard features, allowing for post-event analysis. Auto-Calibration: The device has a fully automatic calibration function. Common Applications This type of monitor is used in various industries where workers may be exposed to hydrogen sulfide, such as: Crude oil and natural gas production Wastewater treatment facilities and sewers Confined spaces, including on farms with manure storage