StoneL Quartz QX33 QX44 Valve Position Monitors – SST and NAMUR Sensors
The StoneL Quartz QX33 QX44 Valve Position Monitors are industrial valve monitoring devices designed to provide discrete position feedback from automated valve actuators. These products belong to the StoneL Quartz QX family, a platform developed for demanding process automation applications. This variable product listing combines two sensor configurations: the QX33 solid-state switching sensor family and the QX44 NAMUR sensor family.
Although both families monitor valve position, they use different electrical interfaces. The QX33 incorporates a dual solid-state normally open switching module, while the QX44 uses a dual NAMUR sensor module designed for compatible NAMUR input circuits. Therefore, selecting the correct configuration is essential when replacing an existing device or specifying equipment for a new installation.
Wuhan Yuli Automation accepts inquiries for four complete ordering codes: QX33K02HDM, QX33K05HDM, QX44K02HDM and QX44K03HDM. Customers can select the required model variation and request availability, commercial pricing and confirmation of the applicable technical configuration.
Key Features and Benefits
- Valve position feedback: Monitors the position of compatible automated valve and actuator assemblies.
- Two sensor technologies: Select QX33 solid-state normally open switching or QX44 NAMUR sensor feedback.
- Dual sensor modules: Provides two sensing channels for suitable open and closed position applications.
- Quartz industrial construction: The enclosure platform is designed for challenging industrial process environments.
- Compact monitoring arrangement: Integrates sensing components within a field-mounted valve monitor housing.
- Local position indication: Quartz visual indicator options help personnel identify valve status at the installation.
- Configurable ordering options: Complete model codes identify the requested mechanical and electrical arrangement.
- International supply inquiries: Buyers can request individual replacement units or multiple model numbers.
Available StoneL Quartz QX33 and QX44 Models
The following four model numbers are included in this combined product listing. Each model should be configured as a separate WooCommerce variation. The complete ordering code must be checked against the original nameplate and manufacturer documentation before purchase.
| Model Number | Series | Sensor Technology |
|---|---|---|
| QX33K02HDM | QX33 | SST solid-state NO dual module |
| QX33K05HDM | QX33 | SST solid-state NO dual module |
| QX44K02HDM | QX44 | NAMUR dual sensor module |
| QX44K03HDM | QX44 | NAMUR dual sensor module |
Important: The four complete codes are reproduced from the requested model list. Exact suffix meanings, connection dimensions and individual approvals must be verified against the applicable StoneL ordering documentation.
Technical Specifications
| Brand | StoneL / Valmet |
|---|---|
| Product Platform | Quartz QX Series |
| Product Type | Industrial Valve Position Monitor |
| QX33 Function | Dual SST normally open solid-state switching sensors |
| QX44 Function | Dual NAMUR sensors |
| NAMUR Standard | EN 60947-5-6 sensor interface |
| Sensor Channels | 2 per module configuration |
| Position Feedback | Discrete actuator or valve position indication |
| Enclosure Family | Quartz QX explosionproof platform; exact approvals vary |
| Enclosure Material | Quartz platform offers epoxy-coated anodized aluminum and selected stainless steel options; confirm exact model |
| Connection and Indication | Dependent on complete ordering code |
| Application | Automated on/off valve monitoring |
These are series-level characteristics. Electrical voltage, current, operating temperature, ingress protection and hazardous-location certifications must be checked for the exact supplied unit. QX33 and QX44 should not share a single electrical rating.
StoneL Quartz QX33 Solid-State Valve Monitor
The StoneL Quartz QX33 uses a dual solid-state switching sensor module with normally open outputs. This technology is intended for compatible electrical monitoring circuits that require discrete valve position feedback. Solid-state switching differs from conventional mechanical contacts and from the current-based NAMUR interface used in the QX44 family.
In a typical application, the two sensors can be adjusted to represent selected actuator positions. When the actuator reaches a configured position, the corresponding sensor changes its electrical output state. The connected controller can interpret that signal according to the system’s input configuration.
Before ordering QX33K02HDM or QX33K05HDM, confirm the required input voltage, sensor load, wiring arrangement and original ordering code. The control system must be electrically compatible with the installed solid-state switching module.
StoneL Quartz QX44 NAMUR Valve Monitor
The StoneL Quartz QX44 incorporates a dual NAMUR sensor module. NAMUR sensors use a defined electrical interface commonly connected to compatible switching amplifiers or intrinsically safe interface equipment. The QX44 family is therefore relevant when the control architecture specifically requires NAMUR-type position feedback.
Because the NAMUR interface is different from a conventional solid-state switching output, the QX44 must be matched to the appropriate input device. A QX33 cannot be assumed to provide an equivalent electrical signal. Similarly, a NAMUR sensor should not be connected as though it were a standard dry contact without reviewing the manufacturer’s wiring requirements.
When purchasing QX44K02HDM or QX44K03HDM, customers should verify the existing interface equipment, original sensor configuration and complete model number. Where intrinsic safety is required, the complete installation must be assessed against the relevant approved equipment and documentation.
QX33 vs. QX44: Understanding the Difference
Both QX33 and QX44 belong to the StoneL Quartz valve monitoring platform, and both are designed to detect valve or actuator position. Their main difference is the sensor interface. QX33 provides normally open solid-state switching, while QX44 uses NAMUR sensing technology.
This distinction matters during replacement projects. A device with the correct mechanical housing may still be electrically incompatible with the existing control panel. The input module, wiring method and applicable protection concept must therefore be checked before considering any substitution.
For maintenance departments, the safest purchasing approach is to begin with the original complete StoneL model number. For new installations, the electrical design and project specifications should determine whether an SST or NAMUR configuration is required.
Industrial Applications
StoneL Quartz QX33 and QX44 valve monitors can be considered for process automation installations in oil and gas, chemical processing, petrochemical manufacturing, power generation, water and wastewater treatment, pulp and paper, pharmaceutical manufacturing and other industrial sectors.
Automated valves often require position feedback so that a control system can distinguish between open, closed and intermediate operating conditions. A properly configured position monitor provides discrete information about selected actuator positions. This feedback can assist operators during normal operation, commissioning and equipment maintenance.
Quartz enclosures are developed for demanding environments where equipment may encounter moisture, corrosion or frequent cleaning. Nevertheless, material selection, environmental suitability and certifications must be checked for each complete product configuration. A family-level description does not establish approval for every installation.
Installation and Model Selection Guidance
Before selecting a replacement valve monitor, identify the existing manufacturer’s complete ordering code. Confirm whether the control system requires an SST normally open output or a NAMUR interface. Next, review the actuator mounting arrangement, shaft interface, conduit entry, position indicator and electrical connections.
When a unit is installed in a classified hazardous location, the exact nameplate certification and installation instructions are essential. The approval status of one Quartz model must not be assumed to apply to a different model. Qualified personnel should carry out installation and commissioning according to the manufacturer’s instructions and applicable site requirements.
For purchasing inquiries, providing photographs of the original unit and its identification plate can help clarify the requested configuration. Customers should also specify quantity, destination country and any special technical requirements so the quotation can be prepared accurately.
Why Choose Wuhan Yuli Automation?
Wuhan Yuli Automation Technology Co., Ltd. supplies industrial automation products and replacement components to international customers. Our product range includes StoneL valve monitors, valve positioners, industrial communication products and other process automation equipment.
We assist purchasing teams and maintenance professionals with complete model-number inquiries, product sourcing and international quotations. Customers can request a single Quartz QX33 or QX44 unit or submit several model numbers together for commercial review.
Final availability, pricing, delivery lead time, product revision and warranty conditions will be confirmed before order acceptance. We recommend checking the complete manufacturer code rather than relying only on photographs or general product family descriptions.
Frequently Asked Questions
What is the StoneL Quartz QX33?
The QX33 is a Quartz valve position monitor configuration using a dual SST normally open solid-state switching sensor module.
What is the StoneL Quartz QX44?
The QX44 is a Quartz valve position monitor configuration using a dual NAMUR sensor module intended for compatible NAMUR interface equipment.
Can QX33 replace QX44?
Direct interchangeability should not be assumed. The two series use different sensor interfaces, and the connected electrical system must support the selected configuration.
Are all four listed models identical?
No. They belong to two different sensor families, and their complete ordering codes may also identify different mechanical or connection arrangements.
How can I request a quotation?
Send the complete model number, required quantity, delivery destination and any relevant technical requirements to Wuhan Yuli Automation.
