: A large, easy-to-read display with a local magnetic interface allows for calibration and maintenance without opening the transmitter housing, making it ideal for hazardous, high-temperature areas. Maintenance and Reliability

Because of its adaptability, the XNX is widely used in sectors where gas hazards are a critical concern: Resource Article: XNX Universal Transmitter

Do you need a (like Modbus or HART)?

The XNX communicates its health status, diagnostic faults, and gas concentrations via specific milliamp levels. Understanding these states prevents false alarms during system maintenance. Signal Level (mA) Operational State Description System Fault

The XNX features a non-intrusive magnetic user interface, allowing technicians to configure and calibrate the unit in classified explosive areas without breaking the explosion-proof seal of the housing. [ ^ ] Up [ < ] Left [ > ] Right [ v ] Down Initial Sensor Initialization

Using or OneWireless™ network, a safety supervisor can view gas readings from every worker in a hot work zone from a control room.

The "4 hot" terminology typically refers to the interface of the XNX EC sensor. This allows for: