HD-HLDZ-LoRa/Ex and HD-HLDZ-NB/Ex explosion-proof grounding resistance monitors are specially designed for explosion-prone environments. They are mainly used for online monitoring of the connection status of grounding down conductors, grounding resistance and metal bonding resistance. Adopting non-contact measurement technology, the monitor requires no self-inspection process and supports real-time online monitoring, eliminating the cumbersome disassembly, wiring and on-site construction required by traditional contact measurement. It meets the demands for safe and efficient monitoring in explosion-proof scenarios.
HD-HLDZ-LoRa/Ex: LoRa communication version, to be used with a LoRa gateway. The LoRa gateway manages all grounding resistance monitor nodes within a designated area, controlling the measurement operations of each node device and reading measured data. Under line-of-sight open space conditions, the LoRa communication range can reach 3 km.
HD-HLDZ-NB/Ex: NB-IoT communication version, supports periodic scheduled measurement. Measurement data can be uploaded to the cloud server via the NB-IoT network. Users can log in to the platform with the account provided by the manufacturer’s back-end management system to view the operating status and historical collected data of the monitor. No additional gateway deployment is required, suitable for single-point or distributed explosion-proof monitoring sites. Note: When selecting the NB-IoT communication version for use outside Guangdong Province, contact the manufacturer to re-modify the registration address information of the IoT card; otherwise, communication abnormalities will occur.
