When comparing different models of quantitative gas leak detectors, it is advisable to first confirm the detection principle and minimum detection limit. The DRD-5B uses a solid-state semiconductor detection principle, with a minimum detection limit of 1ppm and a range covering 1–1000ppm, which can meet the need to find low-concentration leak points in routine leak detection of power equipment. The response time is instantaneous, and the warm-up time is about 30 seconds, so it can quickly enter the measurement state after power-on. Procurement personnel can compare these parameters item by item with on-site detection accuracy requirements to avoid mismatches between the range or detection limit and actual working conditions.
This model supports combined use of the handheld unit and the main unit, and the probe hose length is provided as a 50mm specification according to the configuration. The main unit weighs 1.6Kg and the handheld unit weighs 0.4Kg, so the handheld portion imposes less burden when moving around the equipment area for detection. The power supply method and battery life need to be confirmed according to the specific configuration; during procurement, the supplier can be asked to clarify the battery type and continuous working time. The operating ambient temperature is 0–52°C, covering most indoor power equipment operating environments. For teams that need to frequently move up and down equipment and conduct long inspections, it is recommended to focus on checking whether the handheld unit weight and probe hose length make it easy to reach connectors on switchgear, GIS gas compartments, and other locations.
Quantitative gas leak detectors are commonly used to locate leak points in SF6 gas-insulated equipment, including circuit breaker gas compartments, flange surfaces of combined electrical apparatus, and pipe joints. The DRD-5B's 1ppm minimum detection limit and 1–1000ppm range are suitable for qualitative and quantitative judgment from trace leaks to obvious leaks. During procurement comparisons, attention can be paid to the equipment's stability performance in a 0–52°C environment and whether the probe response speed meets the pace of point-by-point inspection. If the site is mainly indoor substations, this operating temperature range can cover detection conditions in most seasons.
In addition to items such as detection principle, detection limit, range, response time, warm-up time, probe hose length, power supply, and battery life, it is recommended to require the supplier to provide a clear configuration list distinguishing the main unit, handheld unit, probe, and supplied accessories. For scenarios with weight and size requirements for handling, on-site trial use can be conducted to confirm the actual grip feel of the 0.4Kg handheld unit. Parameter information is subject to the product nameplate and factory instructions; checking item by item during procurement can reduce adaptation problems in subsequent use.
