StoneL MQ2WE1R Valve Position Sensor

StoneL MQ2WE1R Valve Position Sensor is a Quartz‑series valve position indicator designed to monitor an actuator’s position and provide direct feedback to control systems. It offers two SPDT (form C) switches with gold contacts, enabling independent open/close signaling from a single valve actuator for safer interlock and control logic implementations. The unit is built for harsh process environments with a rugged enclosure rated 4X, suitable for installation on valve actuators in demanding installations. As part of StoneL’s Quartz family, the MQ2WE1R fits into the broader valve communication and monitoring ecosystem, where position indicators and transmitters can be configured with or without integrated switches to match specific safety and automation needs. The MQ2WE1R variant is listed as discontinued by the manufacturer, so current sourcing typically comes through Valmet/StoneL distributors or the latest catalog replacements. Common applications include automated on/off valve monitoring and safety interlocks in hazardous process environments where robust, dual‑signal position feedback is required for reliable controller input and fail‑safe operation.