StoneL Quartz QX4G QX4H 4-Switch Maxx-Guard Valve Monitors
The StoneL Quartz QX4G QX4H 4-Switch Maxx-Guard Valve Monitors are industrial valve position monitoring devices designed for applications requiring four discrete SPDT switching elements. Part of the StoneL Quartz QX family, these monitors provide position-related electrical feedback for automated valve and actuator assemblies in industrial process control environments.
This variable product includes the QX4G Maxx-Guard low-current series and the QX4H Maxx-Guard higher-current series. Although the two families share a four-switch architecture, their electrical ratings are different. Therefore, buyers should select the appropriate series based on their control circuit, actuator arrangement and complete StoneL ordering code.
Wuhan Yuli Automation accepts inquiries for eight model numbers: QX4GE02NRA, QX4GE03NRA, QX4GR05NRA, QX4GR06NRA, QX4HE02NRA, QX4HE03NRA, QX4HR05NRA and QX4HR06NRA. Each is presented as a selectable variation to simplify product discovery and quotation requests.
Key Features and Benefits
- Four SPDT sensing elements: Supports multiple discrete valve or actuator position feedback points.
- Maxx-Guard proximity technology: Provides industrial switching functionality for compatible monitoring circuits.
- Two electrical families: QX4G supports low-current applications, while QX4H provides a higher-current switch option.
- Quartz enclosure platform: Designed for industrial environments where durable valve monitoring equipment is required.
- Configurable indication: Ordering options may include different visual indication and connection arrangements.
- Process automation integration: Enables compatible controllers and input modules to receive discrete switching feedback.
- Replacement flexibility: Complete ordering codes help distinguish electrical, mechanical and enclosure configurations.
- International procurement: Buyers can request quotations for individual models or multiple variations.
Available StoneL Quartz QX4G and QX4H Models
The following eight model numbers are included in this product listing. All models belong to the Quartz QX four-switch platform, but complete ordering codes must be checked individually before purchase.
| Model Number | Switch Family | Configuration |
|---|---|---|
| QX4GE02NRA | QX4G Low Current | Four SPDT Maxx-Guard switches |
| QX4GE03NRA | QX4G Low Current | Four SPDT Maxx-Guard switches |
| QX4GR05NRA | QX4G Low Current | Four SPDT Maxx-Guard switches |
| QX4GR06NRA | QX4G Low Current | Four SPDT Maxx-Guard switches |
| QX4HE02NRA | QX4H 3A | Four SPDT Maxx-Guard switches |
| QX4HE03NRA | QX4H 3A | Four SPDT Maxx-Guard switches |
| QX4HR05NRA | QX4H 3A | Four SPDT Maxx-Guard switches |
| QX4HR06NRA | QX4H 3A | Four SPDT Maxx-Guard switches |
Ordering note: The model codes are reproduced from the requested list. Exact enclosure material, conduit entry, shaft, indication and approval options require confirmation against the applicable StoneL ordering guide.
Technical Specifications
| Brand | StoneL / Valmet |
|---|---|
| Product Family | Quartz QX4G / QX4H |
| Product Type | Four-Switch Industrial Valve Monitor |
| Number of Switches | 4 |
| Switch Configuration | SPDT Maxx-Guard proximity switching |
| QX4G Electrical Ratings | 0.20 A at 120 VAC; 0.30 A at 24 VDC |
| QX4H Electrical Limits | Vmax 240 V; Imax 3 A; Pmax 100 W; subject to minimum-load requirements |
| Monitoring Function | Discrete valve and actuator position feedback |
| Enclosure | Quartz QX industrial housing; material depends on configuration |
| Visual Indication | Dependent on complete ordering code |
| Hazardous-Area Approval | Verify exact model and nameplate certification |
Electrical values are switch-family limits from StoneL technical documentation. They must not be combined as simultaneous maximum operating conditions. Always confirm the rating and approval of the exact delivered unit.
StoneL Quartz QX4G Maxx-Guard Low Current Valve Monitor
The QX4G series is designed for applications that require four SPDT Maxx-Guard low-current proximity switches. This configuration is useful when a valve or actuator installation needs more than the two switching elements provided by a conventional dual-switch monitor.
According to StoneL technical documentation, the G-type Maxx-Guard sensor is rated for 0.20 A at 120 VAC and 0.30 A at 24 VDC. These electrical characteristics should be considered when selecting a monitor for PLC inputs, discrete feedback circuits or other compatible control devices.
Because QX4G is a low-current family, it should not be selected solely on the basis of its enclosure appearance. The switching circuit and full model number must match the application requirements. When replacing an existing QX4G, confirm the original wiring and terminal arrangement before ordering.
StoneL Quartz QX4H Maxx-Guard 3A Valve Monitor
The QX4H series uses four SPDT Maxx-Guard switches with a higher-current electrical configuration. The documented H-type switch limits include a maximum voltage of 240 V, maximum current of 3 A and maximum power of 100 W, with additional minimum-load requirements.
These limits must be interpreted together with the manufacturer’s electrical specifications. For example, the maximum current and maximum voltage are not automatically permitted at the same time if that combination exceeds the power rating. Proper selection therefore requires an assessment of the actual switching load.
QX4H models are relevant when the installed circuit requires the documented H-type switch technology. However, QX4H and QX4G should not be treated as directly interchangeable because their electrical behavior and load requirements differ.
How a Four-Switch Valve Monitor Works
A valve monitor detects actuator movement through position-related switching elements. In the Quartz platform, cams associated with the actuator shaft operate the sensing devices. Each switch provides a discrete signal that can be connected to a compatible monitoring or control circuit.
With four switches, the assembly offers additional discrete feedback points compared with a two-switch configuration. The specific assignment of those points depends on the actuator, cam setup and project wiring design. For example, some installations may require redundant end-position signals or additional status points for a particular control arrangement.
Correct adjustment is important because the switching points must correspond to the intended mechanical positions. Installation, configuration and maintenance should follow the StoneL instructions applicable to the supplied device. For safety-related applications, system-level requirements and documented testing procedures must also be considered.
Industrial Applications
StoneL Quartz QX4G and QX4H monitors can be considered for automated valve applications in oil and gas facilities, petrochemical plants, chemical processing, power generation, pulp and paper, water treatment, food processing and other industrial environments.
In these installations, valve position feedback can help operators and control systems determine whether an actuator has reached a required position. Four-switch arrangements may be useful where multiple discrete feedback signals are required by the automation architecture.
The Quartz enclosure platform is designed for demanding process environments, including applications where corrosion resistance and robust mechanical construction are important. Nevertheless, enclosure material, ingress protection and hazardous-location suitability must be confirmed for the specific product configuration.
QX4G vs. QX4H: Which Series Should You Choose?
Both series provide four SPDT Maxx-Guard sensing elements, but they address different electrical requirements. QX4G is the low-current switch family, while QX4H offers the higher-current H-type switch configuration. The correct choice depends primarily on the connected circuit and the required switching characteristics.
Before purchasing, identify the existing monitor’s full model number. Then verify its switching voltage, current, load characteristics, terminal arrangement, visual indicator and installation approvals. These checks are especially important when replacing older industrial equipment or reviewing a possible alternative model.
If the required product is intended for a new project, provide the actuator information and control circuit requirements to the equipment supplier. This can help clarify whether the G-type or H-type configuration is appropriate.
Ordering and Replacement Guidance
Wuhan Yuli Automation accepts inquiries for all eight listed QX4G and QX4H model numbers. When requesting a quotation, please provide the complete ordering code, quantity, delivery destination and any special technical requirements.
For replacement applications, photographs of the existing unit and its nameplate can be helpful. Customers should also confirm the conduit connections, enclosure material, visual indicator, shaft arrangement and relevant certification markings. Similar-looking Quartz monitors may contain different electrical switching modules.
Availability, final pricing and delivery lead time depend on the requested model and supply conditions. Any proposed substitute or superseding model should be checked for compatibility before an order is confirmed.
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 Quartz valve monitors, valve positioners, communication equipment and related process automation components.
We support model-number inquiries, international procurement requests and commercial quotations. Customers can request a single QX4G or QX4H unit or submit multiple model numbers for a combined quotation. We aim to provide clear product identification, supply information and responsive communication throughout the purchasing process.
Frequently Asked Questions
What is the StoneL Quartz QX4 Series?
It is a group of Quartz valve monitors using four discrete switching elements. This product listing covers the QX4G low-current and QX4H higher-current Maxx-Guard SPDT configurations.
How many switches do QX4G and QX4H have?
Both families use four SPDT Maxx-Guard proximity switching elements.
What is the difference between QX4G and QX4H?
The main difference is their electrical switch rating. QX4G is intended for low-current applications, while QX4H uses the higher-current H-type switch family.
Can QX4G replace QX4H?
Direct interchangeability should not be assumed. The electrical load, complete ordering code, connections and installation approvals must be checked.
How do I request a quotation?
Send the complete StoneL model number, required quantity and destination country to Wuhan Yuli Automation. Our team can review your request and provide available commercial information.
