Product Description

The STONEL QX2VB02HDM QX2VB02SDM QX2VCK02SDM series offers a streamlined family of compact industrial position switches engineered for reliable valve status feedback in applications where space, simplicity, and certified safety are paramount. STONEL has developed these three models around a common low profile polymer enclosure, providing dual independent microswitches with either standard heavy duty, SIL capable, or pre wired cable termination options. This series is ideal for small bore pneumatic actuators, modular skid systems, analyser houses, dust collection valves, and any installation requiring dependable open close indication without the bulk of traditional limit switch boxes.

The STONEL QX2VB02HDM is the base model in this series, featuring a glass reinforced polyester enclosure rated IP67 for dust tight protection and temporary immersion. Two mechanical snap action microswitches provide SPDT contacts rated at 5A 250V AC, sufficient for most PLC and relay inputs. The cam mechanism is externally adjustable using a hex key, allowing stroke angle setting from 30 to 120 degrees without removing the enclosure cover. A high contrast visual position indicator with red and green sectors offers immediate local confirmation. The STONEL QX2VB02HDM includes two M20 cable entry threads and operates from -25°C to +85°C. This model is the cost effective choice for general purpose valve monitoring in water treatment, food processing, and light industrial applications.

For safety instrumented systems requiring documented reliability, the STONEL QX2VB02SDM provides the same compact form factor but with microswitches selected and tested for SIL 2 capability per IEC 61508. Each unit receives a unique serial number and certificate of conformance, with mean time to failure data available for safety calculations. The STONEL QX2VB02SDM maintains identical IP67 protection, external cam adjustment, and visual indicator as the HDM version, but adds full traceability of components and factory functional test records. Plant engineers specifying emergency shutdown valves or high integrity pressure protection systems on space constrained actuators will find the STONEL QX2VB02SDM delivers certified safety in a compact package.

The STONEL QX2VCK02SDM distinguishes itself with an integral 2 meter long heavy duty cable instead of threaded cable entries. This pre wired configuration eliminates the need for conduit, glands, or field wiring of the enclosure, significantly reducing installation time and potential moisture ingress points. The cable contains four color coded conductors for common, normally open, and normally closed connections, plus a ground wire. The STONEL QX2VCK02SDM incorporates the same SIL rated dual microswitches as the SDM model, rated at 5A 250V AC, and retains the IP67 sealed polymer enclosure. The factory molded cable entry is strain relieved and fully potted, ensuring long term reliability even in vibrating environments. This model is particularly well suited for prefabricated valve packages, offshore modules, and any location where quick disconnect wiring is advantageous.

All three STONEL switches feature a low profile design with overall height of just 70 millimeters, making them compatible with compact rack and pinion actuators where larger switch boxes would interfere with adjacent equipment. The NAMUR VDI VDE 3845 mounting interface uses standard 30mm drive shaft coupling with adapters for 9mm and 11mm square shafts. An optional stainless steel mounting bracket is available for non standard actuator top works. The visual indicator is visible from 10 meters distance, and the enclosure material is UV stabilized for outdoor use. For maintenance teams seeking a unified, compact, and certifiable position feedback solution, the STONEL QX2VB02HDM QX2VB02SDM QX2VCK02SDM series delivers application specific configurations without sacrificing reliability. Specify STONEL for intelligent valve monitoring solutions that fit where others cannot.