REMS Detect GS4 Set F. The perfect solution for reliable leak detection. A super-small, super-compact electronic leak detector with a detachable, flexible extension and interchangeable sensors. For reliably locating various types of gas, such as natural gas, methane, LPG, propane, butane, hydrogen, ammonia, and various refrigerants. Robust, impact-resistant plastic housing. Soft grip for safe, ergonomic operation. A single button for switching on/off and manually starting the initialization phase. After switching on and with the sensor inserted, the REMS Detect GS4 automatically starts the initialization phase. Status indicator with two green LEDs: alternating flashing = initialization phase, both continuously lit = ready for operation. Visual and audible signaling via three colored LEDs – yellow, orange, red – and frequency adjustment of the signal tone when the gas concentration changes. Flexible 200 mm extension, removable without tools. For hard-to-reach areas. Interchangeable sensors for locating various types of gases/refrigerants, e.g., flammable gases, refrigerants, ammonia, hydrogen (see description below). Color-coded. Tool-free installation directly onto the REMS Detect GS4 or onto a flexible extension. Measuring principle: Semiconductor sensor, warm-up phase 15–150 s, response time approx. 2 s (at high concentrations). Interchangeable GS4-LED attachment with high-intensity LED light. German quality product. Electronic leak detector, flexible 200 mm extension, removable without tools, GS4-F interchangeable sensor for flammable gases, 2 x 1.5 V AAA LR3 batteries. Supplied in a sturdy soft bag.