StoneL Quartz QX45 NAMUR Valve Monitor
The StoneL Quartz QX45 NAMUR Valve Monitor is a valve position monitoring solution developed for automated on/off valves in industrial process control systems. As part of the StoneL Quartz product family, the QX45 combines two NAMUR solid-state sensors with a robust industrial enclosure to provide feedback on valve open and closed positions. This information helps operators and control systems confirm valve movement during normal operation.
For plants using compatible NAMUR interface equipment, the QX45 offers a practical approach to discrete valve position feedback. Its dual-sensor arrangement is useful when both end positions must be monitored. Furthermore, the Quartz platform supports configurable visual indication, conduit connections and other ordering options, allowing customers to select equipment that matches existing valve assemblies.
Key Features and Benefits
- Dual NAMUR sensing: Two solid-state sensors support separate open and closed valve position signals.
- Industry-standard interface: NAMUR sensor technology conforms to EN 60947-5-6 and is intended for compatible interface circuits.
- Low-power sensing: The QX45 sensor module operates within the documented 5–25 VDC sensor range.
- Durable Quartz construction: The QX enclosure family is engineered for challenging industrial process environments.
- Convenient position adjustment: The sensor and cam arrangement allows valve end positions to be configured during installation.
- Multiple ordering configurations: Full model codes distinguish connection, indication and other selectable options.
- Maintenance-friendly selection: Complete model-number identification helps buyers source appropriate replacement equipment.
Available StoneL Quartz QX45 Models
Wuhan Yuli Automation accepts inquiries for the following five StoneL Quartz QX45 NAMUR Valve Monitor configurations. Each ordering code should be treated as a separate selectable variation. Although these products belong to the same QX45 family, different codes may represent different conduit entries, indicator arrangements or enclosure configurations. Therefore, the complete code should always be confirmed before purchase.
| Model Number | Product Family |
|---|---|
| QX45E02NRA | Quartz QX45 NAMUR Valve Monitor |
| QX45E03NRA | Quartz QX45 NAMUR Valve Monitor |
| QX45R05NRA | Quartz QX45 NAMUR Valve Monitor |
| QX45R06NRA | Quartz QX45 NAMUR Valve Monitor |
| QX45CK02HDM | Quartz QX45 NAMUR Valve Monitor |
Important: The exact configuration, approvals and interchangeability of each complete ordering code must be checked against manufacturer documentation and the product nameplate.
Technical Specifications
| Brand | StoneL / Valmet |
|---|---|
| Series | Quartz QX45 |
| Function | On/off valve position monitoring |
| Sensor Configuration | Two NAMUR solid-state sensors |
| Sensor Standard | EN 60947-5-6 |
| Sensor Voltage Range | 5–25 VDC (manufacturer installation manual) |
| Target Present | Current below 1 mA |
| Target Absent | Current above 3 mA |
| Sensor Module Temperature | -40°C to +80°C; installation approval may impose narrower limits |
| Enclosure Family | Quartz QX industrial enclosure |
| Connections and Indication | Depend on the complete ordering code |
How NAMUR Valve Position Monitoring Works
The QX45 uses two sensors to detect the position of an actuator-mounted target. During valve movement, the target changes its relationship to the sensors, allowing compatible NAMUR interface equipment to interpret the valve’s position. One sensor can represent the closed end position, while the other represents the open end position. The exact signal interpretation depends on the control circuit and the installed configuration.
According to the StoneL installation documentation, the QX45 sensor arrangement provides current-based switching signals. A target-present condition is associated with a current below 1 mA, while a target-absent condition is associated with a current above 3 mA. Proper interface equipment and approved installation practices are important, especially where intrinsic safety requirements apply.
Industrial Applications
The StoneL Quartz QX45 is intended for valve automation applications that require dependable discrete feedback. Typical sectors include oil and gas production, petrochemical processing, chemical manufacturing, power generation, water treatment, pulp and paper, and other process industries. For example, operators may use valve position feedback to confirm that an automated isolation valve has reached its commanded position.
However, selection must consider the actuator arrangement, ambient conditions, electrical interface, mounting requirements and hazardous-area classification. A model suitable for one installation should not automatically be assumed suitable for another. Always review the applicable approval markings and manufacturer’s installation instructions.
QX45 NAMUR vs. QX35 SST Valve Monitor
The StoneL Quartz QX45 and QX35 belong to the same general Quartz valve monitoring family, but their electrical sensing approaches are different. The QX45 uses NAMUR sensor signaling and requires a compatible NAMUR interface. By comparison, the QX35 uses SST universal-voltage switching technology. Consequently, buyers should not substitute one series for the other without checking the control system’s electrical requirements and the complete ordering code.
Ordering and Replacement Guidance
When requesting a replacement StoneL Quartz QX45 valve monitor, record the complete model number from the existing product label. In addition, provide photographs of the nameplate, the required quantity and any relevant connection or approval requirements. This information helps identify the intended configuration and reduces the risk of selecting a unit with an unsuitable electrical or mechanical arrangement.
If a specific configuration is unavailable, an alternative should be reviewed for compatibility rather than assumed interchangeable. Mounting hardware, actuator interface and delivery requirements may also need to be confirmed separately. For international procurement, providing the destination country helps the sales team prepare an appropriate quotation.
Why Choose Wuhan Yuli Automation?
Wuhan Yuli Automation Technology Co., Ltd. supplies industrial automation products and replacement components to customers worldwide. Our team assists buyers with StoneL Quartz model identification, quotation requests and international procurement coordination. We focus on helping customers specify the correct complete model number rather than relying only on a general product family description.
For maintenance teams, equipment distributors and industrial purchasing departments, clear model identification can simplify sourcing. Customers can send their required StoneL QX45 configuration to our sales team for a quotation based on the requested quantity and delivery location.
Frequently Asked Questions
What is the StoneL Quartz QX45 used for?
The QX45 provides open and closed position feedback from automated valves through dual NAMUR sensors. It is intended for use with compatible industrial control and interface equipment.
Does the QX45 use mechanical switches?
The QX45 dual module uses solid-state NAMUR sensors rather than conventional mechanical contacts. Other Quartz models may offer different switching technologies.
Can I replace QX45E02NRA with QX45CK02HDM?
Not without checking the complete configurations. Different ordering codes may specify different connection, indication, enclosure or approval options, even when both products belong to the QX45 series.
Is the StoneL QX45 suitable for hazardous areas?
The Quartz QX family includes hazardous-area configurations. Suitability depends on the exact unit’s certification, the applicable installation requirements and the hazardous-area classification.
How can I request a quotation?
Send the complete StoneL Quartz QX45 model number, quantity, delivery destination and any required documentation to Wuhan Yuli Automation. We will review your inquiry and provide available supply information.
